diff --git a/404.html b/404.html
index 525bffc9..80fdd4db 100644
--- a/404.html
+++ b/404.html
@@ -12,7 +12,7 @@
       
       
       <link rel="shortcut icon" href="/static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -501,8 +501,8 @@
       
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+      <script src="/assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="/assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
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diff --git a/assets/javascripts/bundle.994580cf.min.js b/assets/javascripts/bundle.994580cf.min.js
new file mode 100644
index 00000000..905533db
--- /dev/null
+++ b/assets/javascripts/bundle.994580cf.min.js
@@ -0,0 +1,2 @@
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\t// install a JSONP callback for chunk loading\n \tfunction webpackJsonpCallback(data) {\n \t\tvar chunkIds = data[0];\n \t\tvar moreModules = data[1];\n \t\tvar executeModules = data[2];\n\n \t\t// add \"moreModules\" to the modules object,\n \t\t// then flag all \"chunkIds\" as loaded and fire callback\n \t\tvar moduleId, chunkId, i = 0, resolves = [];\n \t\tfor(;i < chunkIds.length; i++) {\n \t\t\tchunkId = chunkIds[i];\n \t\t\tif(Object.prototype.hasOwnProperty.call(installedChunks, chunkId) && installedChunks[chunkId]) {\n \t\t\t\tresolves.push(installedChunks[chunkId][0]);\n \t\t\t}\n \t\t\tinstalledChunks[chunkId] = 0;\n \t\t}\n \t\tfor(moduleId in moreModules) {\n \t\t\tif(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {\n \t\t\t\tmodules[moduleId] = moreModules[moduleId];\n \t\t\t}\n \t\t}\n \t\tif(parentJsonpFunction) parentJsonpFunction(data);\n\n \t\twhile(resolves.length) {\n \t\t\tresolves.shift()();\n \t\t}\n\n \t\t// add entry modules from loaded chunk to deferred list\n \t\tdeferredModules.push.apply(deferredModules, executeModules || []);\n\n \t\t// run deferred modules when all chunks ready\n \t\treturn checkDeferredModules();\n \t};\n \tfunction checkDeferredModules() {\n \t\tvar result;\n \t\tfor(var i = 0; i < deferredModules.length; i++) {\n \t\t\tvar deferredModule = deferredModules[i];\n \t\t\tvar fulfilled = true;\n \t\t\tfor(var j = 1; j < deferredModule.length; j++) {\n \t\t\t\tvar depId = deferredModule[j];\n \t\t\t\tif(installedChunks[depId] !== 0) fulfilled = false;\n \t\t\t}\n \t\t\tif(fulfilled) {\n \t\t\t\tdeferredModules.splice(i--, 1);\n \t\t\t\tresult = __webpack_require__(__webpack_require__.s = deferredModule[0]);\n \t\t\t}\n \t\t}\n\n \t\treturn result;\n \t}\n\n \t// The module cache\n \tvar installedModules = {};\n\n \t// object to store loaded and loading chunks\n \t// undefined = chunk not loaded, null = chunk preloaded/prefetched\n \t// Promise = chunk loading, 0 = chunk loaded\n \tvar installedChunks = {\n \t\t0: 0\n \t};\n\n \tvar deferredModules = [];\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__webpack_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __webpack_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__webpack_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \tvar jsonpArray = window[\"webpackJsonp\"] = window[\"webpackJsonp\"] || [];\n \tvar oldJsonpFunction = jsonpArray.push.bind(jsonpArray);\n \tjsonpArray.push = webpackJsonpCallback;\n \tjsonpArray = jsonpArray.slice();\n \tfor(var i = 0; i < jsonpArray.length; i++) webpackJsonpCallback(jsonpArray[i]);\n \tvar parentJsonpFunction = oldJsonpFunction;\n\n\n \t// add entry module to deferred list\n \tdeferredModules.push([51,1]);\n \t// run deferred modules when ready\n \treturn checkDeferredModules();\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve an element matching the query selector\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Element or nothing\n */\nexport function getElement<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T | undefined {\n  return node.querySelector<T>(selector) || undefined\n}\n\n/**\n * Retrieve an element matching a query selector or throw a reference error\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Element\n */\nexport function getElementOrThrow<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T {\n  const el = getElement<T>(selector, node)\n  if (typeof el === \"undefined\")\n    throw new ReferenceError(\n      `Missing element: expected \"${selector}\" to be present`\n    )\n  return el\n}\n\n/**\n * Retrieve the currently active element\n *\n * @return Element or nothing\n */\nexport function getActiveElement(): HTMLElement | undefined {\n  return document.activeElement instanceof HTMLElement\n    ? document.activeElement\n    : undefined\n}\n\n/**\n * Retrieve all elements matching the query selector\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Elements\n */\nexport function getElements<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T[] {\n  return Array.from(node.querySelectorAll<T>(selector))\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Create an element\n *\n * @template T - Tag name type\n *\n * @param tagName - Tag name\n *\n * @return Element\n */\nexport function createElement<T extends keyof HTMLElementTagNameMap>(\n  tagName: T\n): HTMLElementTagNameMap[T] {\n  return document.createElement(tagName)\n}\n\n/**\n * Replace an element with another element\n *\n * @param source - Source element\n * @param target - Target element\n */\nexport function replaceElement(\n  source: HTMLElement, target: Node\n): void {\n  source.replaceWith(target)\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\nimport { getActiveElement } from \"../_\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set element focus\n *\n * @param el - Element\n * @param value - Whether the element should be focused\n */\nexport function setElementFocus(\n  el: HTMLElement, value: boolean = true\n): void {\n  if (value)\n    el.focus()\n  else\n    el.blur()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element focus\n *\n * @param el - Element\n *\n * @return Element focus observable\n */\nexport function watchElementFocus(\n  el: HTMLElement\n): Observable<boolean> {\n  return merge(\n    fromEvent<FocusEvent>(el, \"focus\"),\n    fromEvent<FocusEvent>(el, \"blur\")\n  )\n    .pipe(\n      map(({ type }) => type === \"focus\"),\n      startWith(el === getActiveElement())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Element offset\n */\nexport interface ElementOffset {\n  x: number                            /* Horizontal offset */\n  y: number                            /* Vertical offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve element offset\n *\n * @param el - Element\n *\n * @return Element offset\n */\nexport function getElementOffset(el: HTMLElement): ElementOffset {\n  return {\n    x: el.scrollLeft,\n    y: el.scrollTop\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element offset\n *\n * @param el - Element\n *\n * @return Element offset observable\n */\nexport function watchElementOffset(\n  el: HTMLElement\n): Observable<ElementOffset> {\n  return merge(\n    fromEvent(el, \"scroll\"),\n    fromEvent(window, \"resize\")\n  )\n    .pipe(\n      map(() => getElementOffset(el)),\n      startWith(getElementOffset(el))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  NEVER,\n  Observable,\n  Subject,\n  defer,\n  of\n} from \"rxjs\"\nimport {\n  filter,\n  finalize,\n  map,\n  shareReplay,\n  startWith,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Element offset\n */\nexport interface ElementSize {\n  width: number                        /* Element width */\n  height: number                       /* Element height */\n}\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Resize observer entry subject\n */\nconst entry$ = new Subject<ResizeObserverEntry>()\n\n/**\n * Resize observer observable\n *\n * This observable will create a `ResizeObserver` on the first subscription\n * and will automatically terminate it when there are no more subscribers.\n * It's quite important to centralize observation in a single `ResizeObserver`,\n * as the performance difference can be quite dramatic, as the link shows.\n *\n * @see https://bit.ly/3iIYfEm - Google Groups on performance\n */\nconst observer$ = defer(() => of(\n  new ResizeObserver(entries => {\n    for (const entry of entries)\n      entry$.next(entry)\n  })\n))\n  .pipe(\n    switchMap(resize => NEVER.pipe(startWith(resize))\n      .pipe(\n        finalize(() => resize.disconnect())\n      )\n    ),\n    shareReplay({ bufferSize: 1, refCount: true })\n  )\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve element size\n *\n * @param el - Element\n *\n * @return Element size\n */\nexport function getElementSize(el: HTMLElement): ElementSize {\n  return {\n    width:  el.offsetWidth,\n    height: el.offsetHeight\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element size\n *\n * This function returns an observable that will subscribe to a single internal\n * instance of `ResizeObserver` upon subscription, and emit resize events until\n * termination. Note that this function should not be called with the same\n * element twice, as the first unsubscription will terminate observation.\n *\n * @param el - Element\n *\n * @return Element size observable\n */\nexport function watchElementSize(\n  el: HTMLElement\n): Observable<ElementSize> {\n  return observer$\n    .pipe(\n      tap(observer => observer.observe(el)),\n      switchMap(observer => entry$\n        .pipe(\n          filter(({ target }) => target === el),\n          finalize(() => observer.unobserve(el)),\n          map(({ contentRect }) => ({\n            width:  contentRect.width,\n            height: contentRect.height\n          }))\n        )\n      ),\n      startWith(getElementSize(el))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { BehaviorSubject, Subject } from \"rxjs\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve location\n *\n * This function will return a `URL` object (and not `Location`) in order to\n * normalize typings across the application. Furthermore, locations need to be\n * tracked without setting them and `Location` is a singleton which represents\n * the current location.\n *\n * @return URL\n */\nexport function getLocation(): URL {\n  return new URL(location.href)\n}\n\n/**\n * Set location\n *\n * @param url - URL to change to\n */\nexport function setLocation(url: URL): void {\n  location.href = url.href\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Check whether a URL is a local link or a file (except `.html`)\n *\n * @param url - URL or HTML anchor element\n * @param ref - Reference URL\n *\n * @return Test result\n */\nexport function isLocalLocation(\n  url: URL | HTMLAnchorElement,\n  ref: URL | Location = location\n): boolean {\n  return url.host === ref.host\n      && /^(?:\\/[\\w-]+)*(?:\\/?|\\.html)$/i.test(url.pathname)\n}\n\n/**\n * Check whether a URL is an anchor link on the current page\n *\n * @param url - URL or HTML anchor element\n * @param ref - Reference URL\n *\n * @return Test result\n */\nexport function isAnchorLocation(\n  url: URL | HTMLAnchorElement,\n  ref: URL | Location = location\n): boolean {\n  return url.pathname === ref.pathname\n      && url.hash.length > 0\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location\n *\n * @return Location subject\n */\nexport function watchLocation(): Subject<URL> {\n  return new BehaviorSubject<URL>(getLocation())\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { filter, map, share, startWith } from \"rxjs/operators\"\n\nimport { createElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve location hash\n *\n * @return Location hash\n */\nexport function getLocationHash(): string {\n  return location.hash.substring(1)\n}\n\n/**\n * Set location hash\n *\n * Setting a new fragment identifier via `location.hash` will have no effect\n * if the value doesn't change. When a new fragment identifier is set, we want\n * the browser to target the respective element at all times, which is why we\n * use this dirty little trick.\n *\n * @param hash - Location hash\n */\nexport function setLocationHash(hash: string): void {\n  const el = createElement(\"a\")\n  el.href = hash\n  el.addEventListener(\"click\", ev => ev.stopPropagation())\n  el.click()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location hash\n *\n * @return Location hash observable\n */\nexport function watchLocationHash(): Observable<string> {\n  return fromEvent<HashChangeEvent>(window, \"hashchange\")\n    .pipe(\n      map(getLocationHash),\n      startWith(getLocationHash()),\n      filter(hash => hash.length > 0),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { shareReplay, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch media query\n *\n * @param query - Media query\n *\n * @return Media observable\n */\nexport function watchMedia(query: string): Observable<boolean> {\n  const media = matchMedia(query)\n  return new Observable<boolean>(subscriber => {\n    media.addListener(ev => subscriber.next(ev.matches))\n  })\n    .pipe(\n      startWith(media.matches),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\nimport { getElementOrThrow } from \"../element\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Toggle\n */\nexport type Toggle =\n  | \"drawer\"                           /* Toggle for drawer */\n  | \"search\"                           /* Toggle for search */\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Toggle map\n */\nconst toggles: Record<Toggle, HTMLInputElement> = {\n  drawer: getElementOrThrow(`[data-md-toggle=drawer]`),\n  search: getElementOrThrow(`[data-md-toggle=search]`)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve the value of a toggle\n *\n * @param name - Toggle\n *\n * @return Toggle value\n */\nexport function getToggle(name: Toggle): boolean {\n  return toggles[name].checked\n}\n\n/**\n * Set toggle\n *\n * Simulating a click event seems to be the most cross-browser compatible way\n * of changing the value while also emitting a `change` event. Before, Material\n * used `CustomEvent` to programmatically change the value of a toggle, but this\n * is a much simpler and cleaner solution which doesn't require a polyfill.\n *\n * @param name - Toggle\n * @param value - Toggle value\n */\nexport function setToggle(name: Toggle, value: boolean): void {\n  if (toggles[name].checked !== value)\n    toggles[name].click()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch toggle\n *\n * @param name - Toggle\n *\n * @return Toggle value observable\n */\nexport function watchToggle(name: Toggle): Observable<boolean> {\n  const el = toggles[name]\n  return fromEvent(el, \"change\")\n    .pipe(\n      map(() => el.checked),\n      startWith(el.checked)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport offset\n */\nexport interface ViewportOffset {\n  x: number                            /* Horizontal offset */\n  y: number                            /* Vertical offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve viewport offset\n *\n * On iOS Safari, viewport offset can be negative due to overflow scrolling.\n * As this may induce strange behaviors downstream, we'll just limit it to 0.\n *\n * @return Viewport offset\n */\nexport function getViewportOffset(): ViewportOffset {\n  return {\n    x: Math.max(0, pageXOffset),\n    y: Math.max(0, pageYOffset)\n  }\n}\n\n/**\n * Set viewport offset\n *\n * @param offset - Viewport offset\n */\nexport function setViewportOffset(\n  { x, y }: Partial<ViewportOffset>\n): void {\n  window.scrollTo(x || 0, y || 0)\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport offset\n *\n * @return Viewport offset observable\n */\nexport function watchViewportOffset(): Observable<ViewportOffset> {\n  return merge(\n    fromEvent(window, \"scroll\", { passive: true }),\n    fromEvent(window, \"resize\", { passive: true })\n  )\n    .pipe(\n      map(getViewportOffset),\n      startWith(getViewportOffset())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport size\n */\nexport interface ViewportSize {\n  width: number                        /* Viewport width */\n  height: number                       /* Viewport height */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve viewport size\n *\n * @return Viewport size\n */\nexport function getViewportSize(): ViewportSize {\n  return {\n    width:  innerWidth,\n    height: innerHeight\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport size\n *\n * @return Viewport size observable\n */\nexport function watchViewportSize(): Observable<ViewportSize> {\n  return fromEvent(window, \"resize\", { passive: true })\n    .pipe(\n      map(getViewportSize),\n      startWith(getViewportSize())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, combineLatest } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  shareReplay\n} from \"rxjs/operators\"\n\nimport { Header } from \"components\"\n\nimport {\n  ViewportOffset,\n  watchViewportOffset\n} from \"../offset\"\nimport {\n  ViewportSize,\n  watchViewportSize\n} from \"../size\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport\n */\nexport interface Viewport {\n  offset: ViewportOffset               /* Viewport offset */\n  size: ViewportSize                   /* Viewport size */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch at options\n */\ninterface WatchAtOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport\n *\n * @return Viewport observable\n */\nexport function watchViewport(): Observable<Viewport> {\n  return combineLatest([\n    watchViewportOffset(),\n    watchViewportSize()\n  ])\n    .pipe(\n      map(([offset, size]) => ({ offset, size })),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n\n/**\n * Watch viewport relative to element\n *\n * @param el - Element\n * @param options - Options\n *\n * @return Viewport observable\n */\nexport function watchViewportAt(\n  el: HTMLElement, { header$, viewport$ }: WatchAtOptions\n): Observable<Viewport> {\n  const size$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\")\n    )\n\n  /* Compute element offset */\n  const offset$ = combineLatest([size$, header$])\n    .pipe(\n      map((): ViewportOffset => ({\n        x: el.offsetLeft,\n        y: el.offsetTop\n      }))\n    )\n\n  /* Compute relative viewport, return hot observable */\n  return combineLatest([header$, viewport$, offset$])\n    .pipe(\n      map(([{ height }, { offset, size }, { x, y }]) => ({\n        offset: {\n          x: offset.x - x,\n          y: offset.y - y + height\n        },\n        size\n      }))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { EMPTY, Observable, of } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  map,\n  scan,\n  shareReplay,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { getElement, replaceElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Component\n */\nexport type Component =\n  | \"announce\"                         /* Announcement bar */\n  | \"container\"                        /* Container */\n  | \"header\"                           /* Header */\n  | \"header-title\"                     /* Header title */\n  | \"main\"                             /* Main area */\n  | \"navigation\"                       /* Navigation */\n  | \"search\"                           /* Search */\n  | \"search-query\"                     /* Search input */\n  | \"search-reset\"                     /* Search reset */\n  | \"search-result\"                    /* Search results */\n  | \"skip\"                             /* Skip link */\n  | \"tabs\"                             /* Tabs */\n  | \"toc\"                              /* Table of contents */\n\n/**\n * Component map\n */\nexport type ComponentMap = {\n  [P in Component]?: HTMLElement\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Component map observable\n */\nlet components$: Observable<ComponentMap>\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up bindings to components with given names\n *\n * This function will maintain bindings to the elements identified by the given\n * names in-between document switches and update the elements in-place.\n *\n * @param names - Component names\n * @param options - Options\n */\nexport function setupComponents(\n  names: Component[], { document$ }: WatchOptions\n): void {\n  components$ = document$\n    .pipe(\n\n      /* Build component map */\n      map(document => names.reduce<ComponentMap>((components, name) => {\n        const el = getElement(`[data-md-component=${name}]`, document)\n        return {\n          ...components,\n          ...typeof el !== \"undefined\" ? { [name]: el } : {}\n        }\n      }, {})),\n\n      /* Re-compute component map on document switch */\n      scan((prev, next) => {\n        for (const name of names) {\n          switch (name) {\n\n            /* Top-level components: update */\n            case \"announce\":\n            case \"header-title\":\n            case \"container\":\n            case \"skip\":\n              if (name in prev && typeof prev[name] !== \"undefined\") {\n                replaceElement(prev[name]!, next[name]!)\n                prev[name] = next[name]\n              }\n              break\n\n            /* All other components: rebind */\n            default:\n              if (typeof next[name] !== \"undefined\")\n                prev[name] = getElement(`[data-md-component=${name}]`)\n              else\n                delete prev[name]\n          }\n        }\n        return prev\n      }),\n\n      /* Convert to hot observable */\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n\n/**\n * Retrieve a component\n *\n * The returned observable will only re-emit if the element changed, i.e. if\n * it was replaced from a document which was switched to.\n *\n * @template T - Element type\n *\n * @param name - Component name\n *\n * @return Component observable\n */\nexport function useComponent<T extends HTMLElement>(\n  name: Component\n): Observable<T> {\n  return components$\n    .pipe(\n      switchMap(components => (\n        typeof components[name] !== \"undefined\"\n          ? of(components[name] as T)\n          : EMPTY\n      )),\n      distinctUntilChanged()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, combineLatest, pipe } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  startWith,\n  switchMap,\n  zipWith\n} from \"rxjs/operators\"\n\nimport {\n  Viewport,\n  getElement,\n  watchViewportAt\n} from \"browser\"\n\nimport { useComponent } from \"../../_\"\nimport {\n  applyHeaderType,\n  watchHeader\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Header type\n */\nexport type HeaderType =\n  | \"site\"                             /* Header shows site title */\n  | \"page\"                             /* Header shows page title */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Header\n */\nexport interface Header {\n  type: HeaderType                     /* Header type */\n  sticky: boolean                      /* Header stickyness */\n  height: number                       /* Header visible height */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount header from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountHeader(\n  { document$, viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Header> {\n  return pipe(\n    switchMap(el => {\n      const header$ = watchHeader(el, { document$ })\n\n      /* Compute whether the header should switch to page header */\n      const type$ = useComponent(\"main\")\n        .pipe(\n          map(main => getElement(\"h1, h2, h3, h4, h5, h6\", main)!),\n          filter(hx => typeof hx !== \"undefined\"),\n          zipWith(useComponent(\"header-title\")),\n          switchMap(([hx, title]) => watchViewportAt(hx, { header$, viewport$ })\n            .pipe(\n              map(({ offset: { y } }) => {\n                return y >= hx.offsetHeight ? \"page\" : \"site\"\n              }),\n              distinctUntilChanged(),\n              applyHeaderType(title)\n            )\n          ),\n          startWith<HeaderType>(\"site\")\n        )\n\n      /* Combine into single observable */\n      return combineLatest([header$, type$])\n        .pipe(\n          map(([header, type]): Header => ({ type, ...header }))\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  of,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  finalize,\n  map,\n  observeOn,\n  shareReplay,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { watchElementSize } from \"browser\"\n\nimport { Header, HeaderType } from \"../_\"\nimport {\n  resetHeaderTitleActive,\n  setHeaderTitleActive\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch header\n *\n * @param el - Header element\n *\n * @return Header observable\n */\nexport function watchHeader(\n  el: HTMLElement, { document$ }: WatchOptions\n): Observable<Omit<Header, \"type\">> {\n  return document$\n    .pipe(\n      map(() => {\n        const styles = getComputedStyle(el)\n        return [\n          \"sticky\",                    /* Modern browsers */\n          \"-webkit-sticky\"             /* Safari */\n        ].includes(styles.position)\n      }),\n      distinctUntilChanged(),\n      switchMap(sticky => {\n        if (sticky) {\n          return watchElementSize(el)\n            .pipe(\n              map(({ height }) => ({\n                sticky: true,\n                height\n              }))\n            )\n        } else {\n          return of({\n            sticky: false,\n            height: 0\n          })\n        }\n      }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply header title type\n *\n * @param el - Header title element\n *\n * @return Operator function\n */\nexport function applyHeaderType(\n  el: HTMLElement\n): MonoTypeOperatorFunction<HeaderType> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(type => {\n      setHeaderTitleActive(el, type === \"page\")\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeaderTitleActive(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set header title active\n *\n * @param el - Header title element\n * @param value - Whether the title is shown\n */\nexport function setHeaderTitleActive(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"active\" : \"\")\n}\n\n/**\n * Reset header title active\n *\n * @param el - Header title element\n */\nexport function resetHeaderTitleActive(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  Observable,\n  OperatorFunction,\n  Subject,\n  noop,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  finalize,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { useComponent } from \"../../_\"\nimport { Header } from \"../../header\"\nimport {\n  applyHeaderShadow,\n  watchMain\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Main area\n */\nexport interface Main {\n  offset: number                       /* Main area top offset */\n  height: number                       /* Main area visible height */\n  active: boolean                      /* Scrolled past top offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount main area from source observable\n *\n * The header must be connected to the main area observable outside of the\n * operator function, as the header will persist in-between document switches\n * while the main area is replaced. However, the header observable must be\n * passed to this function, so we connect both via a long-living subject.\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountMain(\n  { header$, viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Main> {\n  const main$ = new Subject<Main>()\n\n  /* Connect to main area observable via long-living subject */\n  useComponent(\"header\")\n    .pipe(\n      switchMap(header => main$\n        .pipe(\n          distinctUntilKeyChanged(\"active\"),\n          applyHeaderShadow(header)\n        )\n      )\n    )\n      .subscribe(noop)\n\n  /* Return operator */\n  return pipe(\n    switchMap(el => watchMain(el, { header$, viewport$ })),\n    tap(main => main$.next(main)),\n    finalize(() => main$.complete())\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  finalize,\n  map,\n  observeOn,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport, watchElementSize } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../_\"\nimport {\n  resetHeaderShadow,\n  setHeaderShadow\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch main area\n *\n * This function returns an observable that computes the visual parameters of\n * the main area which depends on the viewport vertical offset and height, as\n * well as the height of the header element, if the header is fixed.\n *\n * @param el - Main area element\n * @param options - Options\n *\n * @return Main area observable\n */\nexport function watchMain(\n  el: HTMLElement, { header$, viewport$ }: WatchOptions\n): Observable<Main> {\n\n  /* Compute necessary adjustment for header */\n  const adjust$ = header$\n    .pipe(\n      map(({ height }) => height),\n      distinctUntilChanged()\n    )\n\n  /* Compute the main area's top and bottom borders */\n  const border$ = adjust$\n    .pipe(\n      switchMap(() => watchElementSize(el)\n        .pipe(\n          map(({ height }) => ({\n            top:    el.offsetTop,\n            bottom: el.offsetTop + height\n          })),\n          distinctUntilKeyChanged(\"bottom\")\n        )\n      )\n    )\n\n  /* Compute the main area's offset, visible height and if we scrolled past */\n  return combineLatest([adjust$, border$, viewport$])\n    .pipe(\n      map(([header, { top, bottom }, { offset: { y }, size: { height } }]) => {\n        height = Math.max(0, height\n          - Math.max(0, top    - y,  header)\n          - Math.max(0, height + y - bottom)\n        )\n        return {\n          offset: top - header,\n          height,\n          active: top - header <= y\n        }\n      }),\n      distinctUntilChanged<Main>((a, b) => {\n        return a.offset === b.offset\n            && a.height === b.height\n            && a.active === b.active\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply header shadow\n *\n * @param el - Header element\n *\n * @return Operator function\n */\nexport function applyHeaderShadow(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Main> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ active }) => {\n      setHeaderShadow(el, active)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeaderShadow(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set header shadow\n *\n * @param el - Header element\n * @param value - Whether the shadow is shown\n */\nexport function setHeaderShadow(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"shadow\" : \"\")\n}\n\n/**\n * Reset header shadow\n *\n * @param el - Header element\n */\nexport function resetHeaderShadow(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar offset\n *\n * @param el - Sidebar element\n * @param value - Sidebar offset\n */\nexport function setSidebarOffset(\n  el: HTMLElement, value: number\n): void {\n  el.style.top = `${value}px`\n}\n\n/**\n * Reset sidebar offset\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarOffset(\n  el: HTMLElement\n): void {\n  el.style.top = \"\"\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar height\n *\n * This function doesn't set the height of the actual sidebar, but of its first\n * child – the `.md-sidebar__scrollwrap` element in order to mitigiate jittery\n * sidebars when the footer is scrolled into view. At some point we switched\n * from `absolute` / `fixed` positioning to `sticky` positioning, which greatly\n * reduced jitter in some browsers (respectively Firefox and Safari) when\n * scrolling from the top. However, top-aligned sticky positioning means that\n * the sidebar snaps to the bottom when the end of the container is reached.\n * This is what leads to the mentioned jitter, as the sidebar's height may be\n * updated to slowly.\n *\n * By setting the height of the sidebar to zero (while preserving `padding`),\n * and the height on its first element, this behaviour can be mitigiated. We\n * must assume that the top- and bottom offset (`padding`) are equal, as the\n * `offsetBottom` value is `undefined`.\n *\n * @param el - Sidebar element\n * @param value - Sidebar height\n */\nexport function setSidebarHeight(\n  el: HTMLElement, value: number\n): void {\n  const scrollwrap = el.firstElementChild as HTMLElement\n  scrollwrap.style.height = `${value - 2 * scrollwrap.offsetTop}px`\n}\n\n/**\n * Reset sidebar height\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarHeight(\n  el: HTMLElement\n): void {\n  const scrollwrap = el.firstElementChild as HTMLElement\n  scrollwrap.style.height = \"\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  finalize,\n  map,\n  observeOn,\n  tap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { Header } from \"../../../header\"\nimport { Main } from \"../../../main\"\nimport { Sidebar } from \"../_\"\nimport {\n  resetSidebarHeight,\n  resetSidebarOffset,\n  setSidebarHeight,\n  setSidebarOffset\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/**\n * Apply options\n */\ninterface ApplyOptions {\n  header$: Observable<Header>          /* Header observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch sidebar\n *\n * This function returns an observable that computes the visual parameters of\n * the sidebar which depends on the vertical viewport offset, as well as the\n * height of the main area. When the page is scrolled beyond the header, the\n * sidebar is locked and fills the remaining space.\n *\n * @param el - Sidebar element\n * @param options - Options\n *\n * @return Sidebar observable\n */\nexport function watchSidebar(\n  el: HTMLElement, { main$, viewport$ }: WatchOptions\n): Observable<Sidebar> {\n  const adjust = el.parentElement!.offsetTop\n               - el.parentElement!.parentElement!.offsetTop\n\n  /* Compute the sidebar's available height and if it should be locked */\n  return combineLatest([main$, viewport$])\n    .pipe(\n      map(([{ offset, height }, { offset: { y } }]) => {\n        height = height\n          + Math.min(adjust, Math.max(0, y - offset))\n          - adjust\n        return {\n          height,\n          lock: y >= offset + adjust\n        }\n      }),\n      distinctUntilChanged<Sidebar>((a, b) => {\n        return a.height === b.height\n            && a.lock   === b.lock\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply sidebar\n *\n * @param el - Sidebar element\n * @param options - Options\n *\n * @return Operator function\n */\nexport function applySidebar(\n  el: HTMLElement, { header$ }: ApplyOptions\n): MonoTypeOperatorFunction<Sidebar> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    withLatestFrom(header$),\n    tap(([{ height, lock }, { height: offset }]) => {\n      setSidebarHeight(el, height)\n\n      /* Set offset in locked state depending on header height */\n      if (lock)\n        setSidebarOffset(el, offset)\n      else\n        resetSidebarOffset(el)\n    }),\n\n    /* Re-map to sidebar */\n    map(([sidebar]) => sidebar),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetSidebarOffset(el)\n      resetSidebarHeight(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search transformation function\n *\n * @param value - Query value\n *\n * @return Transformed query value\n */\nexport type SearchTransformFn = (value: string) => string\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Default transformation function\n *\n * 1. Search for terms in quotation marks and prepend a `+` modifier to denote\n *    that the resulting document must contain all terms, converting the query\n *    to an `AND` query (as opposed to the default `OR` behavior). While users\n *    may expect terms enclosed in quotation marks to map to span queries, i.e.\n *    for which order is important, `lunr` doesn't support them, so the best\n *    we can do is to convert the terms to an `AND` query.\n *\n * 2. Replace control characters which are not located at the beginning of the\n *    query or preceded by white space, or are not followed by a non-whitespace\n *    character or are at the end of the query string. Furthermore, filter\n *    unmatched quotation marks.\n *\n * 3. Trim excess whitespace from left and right.\n *\n * @param query - Query value\n *\n * @return Transformed query value\n */\nexport function defaultTransform(query: string): string {\n  return query\n    .split(/\"([^\"]+)\"/g)                            /* => 1 */\n      .map((terms, index) => index & 1\n        ? terms.replace(/^\\b|^(?![^\\x00-\\x7F]|$)|\\s+/g, \" +\")\n        : terms\n      )\n      .join(\"\")\n    .replace(/\"|(?:^|\\s+)[*+\\-:^~]+(?=\\s+|$)/g, \"\") /* => 2 */\n    .trim()                                         /* => 3 */\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n// tslint:disable no-null-keyword\n\nimport { JSX as JSXInternal } from \"preact\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * HTML attributes\n */\ntype Attributes =\n  & JSXInternal.HTMLAttributes\n  & JSXInternal.SVGAttributes\n  & Record<string, any>\n\n/**\n * Child element\n */\ntype Child =\n  | HTMLElement\n  | Text\n  | string\n  | number\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Append a child node to an element\n *\n * @param el - Element\n * @param child - Child node(s)\n */\nfunction appendChild(el: HTMLElement, child: Child | Child[]): void {\n\n  /* Handle primitive types (including raw HTML) */\n  if (typeof child === \"string\" || typeof child === \"number\") {\n    el.innerHTML += child.toString()\n\n  /* Handle nodes */\n  } else if (child instanceof Node) {\n    el.appendChild(child)\n\n  /* Handle nested children */\n  } else if (Array.isArray(child)) {\n    for (const node of child)\n      appendChild(el, node)\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * JSX factory\n *\n * @param tag - HTML tag\n * @param attributes - HTML attributes\n * @param children - Child elements\n *\n * @return Element\n */\nexport function h(\n  tag: string, attributes: Attributes | null, ...children: Child[]\n): HTMLElement {\n  const el = document.createElement(tag)\n\n  /* Set attributes, if any */\n  if (attributes)\n    for (const attr of Object.keys(attributes))\n      if (typeof attributes[attr] !== \"boolean\")\n        el.setAttribute(attr, attributes[attr])\n      else if (attributes[attr])\n        el.setAttribute(attr, \"\")\n\n  /* Append child nodes */\n  for (const child of children)\n    appendChild(el, child)\n\n  /* Return element */\n  return el\n}\n\n/* ----------------------------------------------------------------------------\n * Namespace\n * ------------------------------------------------------------------------- */\n\nexport declare namespace h {\n  namespace JSX {\n    type Element = HTMLElement\n    type IntrinsicElements = JSXInternal.IntrinsicElements\n  }\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { getElementOrThrow } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Translation keys\n */\ntype TranslateKey =\n  | \"clipboard.copy\"                   /* Copy to clipboard */\n  | \"clipboard.copied\"                 /* Copied to clipboard */\n  | \"search.config.lang\"               /* Search language */\n  | \"search.config.pipeline\"           /* Search pipeline */\n  | \"search.config.separator\"          /* Search separator */\n  | \"search.placeholder\"               /* Search */\n  | \"search.result.placeholder\"        /* Type to start searching */\n  | \"search.result.none\"               /* No matching documents */\n  | \"search.result.one\"                /* 1 matching document */\n  | \"search.result.other\"              /* # matching documents */\n  | \"search.result.more.one\"           /* 1 more on this page */\n  | \"search.result.more.other\"         /* # more on this page */\n  | \"search.result.term.missing\"       /* Missing */\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Translations\n */\nlet lang: Record<string, string>\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Translate the given key\n *\n * @param key - Key to be translated\n * @param value - Value to be replaced\n *\n * @return Translation\n */\nexport function translate(\n  key: TranslateKey, value?: string | number\n): string {\n  if (typeof lang === \"undefined\") {\n    const el = getElementOrThrow(\"#__lang\")\n    lang = JSON.parse(el.textContent!)\n  }\n  if (typeof lang[key] === \"undefined\") {\n    throw new ReferenceError(`Invalid translation: ${key}`)\n  }\n  return typeof value !== \"undefined\"\n    ? lang[key].replace(\"#\", value.toString())\n    : lang[key]\n}\n\n/**\n * Truncate a string after the given number of characters\n *\n * This is not a very reasonable approach, since the summaries kind of suck.\n * It would be better to create something more intelligent, highlighting the\n * search occurrences and making a better summary out of it, but this note was\n * written three years ago, so who knows if we'll ever fix it.\n *\n * @param value - Value to be truncated\n * @param n - Number of characters\n *\n * @return Truncated value\n */\nexport function truncate(value: string, n: number): string {\n  let i = n\n  if (value.length > i) {\n    while (value[i] !== \" \" && --i > 0); // tslint:disable-line\n    return `${value.substring(0, i)}...`\n  }\n  return value\n}\n\n/**\n * Round a number for display with source facts\n *\n * This is a reverse engineered version of GitHub's weird rounding algorithm\n * for stars, forks and all other numbers. While all numbers below `1,000` are\n * returned as-is, bigger numbers are converted to fixed numbers:\n *\n * - `1,049` => `1k`\n * - `1,050` => `1.1k`\n * - `1,949` => `1.9k`\n * - `1,950` => `2k`\n *\n * @param value - Original value\n *\n * @return Rounded value\n */\nexport function round(value: number): string {\n  if (value > 999) {\n    const digits = +((value - 950) % 1000 > 99)\n    return `${((value + 0.000001) / 1000).toFixed(digits)}k`\n  } else {\n    return value.toString()\n  }\n}\n\n/**\n * Simple hash function\n *\n * @see https://bit.ly/2wsVjJ4 - Original source\n *\n * @param value - Value to be hashed\n *\n * @return Hash as 32bit integer\n */\nexport function hash(value: string): number {\n  let h = 0\n  for (let i = 0, len = value.length; i < len; i++) {\n    h  = ((h << 5) - h) + value.charCodeAt(i)\n    h |= 0 // Convert to 32bit integer\n  }\n  return h\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchIndex, SearchResult } from \"../../_\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search message type\n */\nexport const enum SearchMessageType {\n  SETUP,                               /* Search index setup */\n  READY,                               /* Search index ready */\n  QUERY,                               /* Search query */\n  RESULT                               /* Search results */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * A message containing the data necessary to setup the search index\n */\nexport interface SearchSetupMessage {\n  type: SearchMessageType.SETUP        /* Message type */\n  data: SearchIndex                    /* Message data */\n}\n\n/**\n * A message indicating the search index is ready\n */\nexport interface SearchReadyMessage {\n  type: SearchMessageType.READY        /* Message type */\n}\n\n/**\n * A message containing a search query\n */\nexport interface SearchQueryMessage {\n  type: SearchMessageType.QUERY        /* Message type */\n  data: string                         /* Message data */\n}\n\n/**\n * A message containing results for a search query\n */\nexport interface SearchResultMessage {\n  type: SearchMessageType.RESULT       /* Message type */\n  data: SearchResult[]                 /* Message data */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * A message exchanged with the search worker\n */\nexport type SearchMessage =\n  | SearchSetupMessage\n  | SearchReadyMessage\n  | SearchQueryMessage\n  | SearchResultMessage\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Type guard for search setup messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchSetupMessage(\n  message: SearchMessage\n): message is SearchSetupMessage {\n  return message.type === SearchMessageType.SETUP\n}\n\n/**\n * Type guard for search ready messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchReadyMessage(\n  message: SearchMessage\n): message is SearchReadyMessage {\n  return message.type === SearchMessageType.READY\n}\n\n/**\n * Type guard for search query messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchQueryMessage(\n  message: SearchMessage\n): message is SearchQueryMessage {\n  return message.type === SearchMessageType.QUERY\n}\n\n/**\n * Type guard for search result messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchResultMessage(\n  message: SearchMessage\n): message is SearchResultMessage {\n  return message.type === SearchMessageType.RESULT\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, asyncScheduler } from \"rxjs\"\nimport {\n  map,\n  observeOn,\n  share,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, watchWorker } from \"browser\"\nimport { translate } from \"utilities\"\n\nimport { SearchIndex, SearchIndexPipeline } from \"../../_\"\nimport {\n  SearchMessage,\n  SearchMessageType,\n  SearchSetupMessage,\n  isSearchResultMessage\n} from \"../message\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  index$: Observable<SearchIndex>      /* Search index observable */\n  base$: Observable<string>            /* Location base observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up search index\n *\n * @param data - Search index\n *\n * @return Search index\n */\nfunction setupSearchIndex(\n  { config, docs, index }: SearchIndex\n): SearchIndex {\n\n  /* Override default language with value from translation */\n  if (config.lang.length === 1 && config.lang[0] === \"en\")\n    config.lang = [translate(\"search.config.lang\")]\n\n  /* Override default separator with value from translation */\n  if (config.separator === \"[\\\\s\\\\-]+\")\n    config.separator = translate(\"search.config.separator\")\n\n  /* Set pipeline from translation */\n  const pipeline = translate(\"search.config.pipeline\")\n    .split(/\\s*,\\s*/)\n    .filter(Boolean) as SearchIndexPipeline\n\n  /* Return search index after defaulting */\n  return { config, docs, index, pipeline }\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up search web worker\n *\n * This function will create a web worker to set up and query the search index\n * which is done using `lunr`. The index must be passed as an observable to\n * enable hacks like _localsearch_ via search index embedding as JSON.\n *\n * @param url - Worker URL\n * @param options - Options\n *\n * @return Worker handler\n */\nexport function setupSearchWorker(\n  url: string, { index$, base$ }: SetupOptions\n): WorkerHandler<SearchMessage> {\n  const worker = new Worker(url)\n\n  /* Create communication channels and resolve relative links */\n  const tx$ = new Subject<SearchMessage>()\n  const rx$ = watchWorker(worker, { tx$ })\n    .pipe(\n      withLatestFrom(base$),\n      map(([message, base]) => {\n        if (isSearchResultMessage(message)) {\n          for (const result of message.data)\n            for (const document of result)\n              document.location = `${base}/${document.location}`\n        }\n        return message\n      }),\n      share()\n    )\n\n  /* Set up search index */\n  index$\n    .pipe(\n      map<SearchIndex, SearchSetupMessage>(data => ({\n        type: SearchMessageType.SETUP,\n        data: setupSearchIndex(data)\n      })),\n      observeOn(asyncScheduler)\n    )\n      .subscribe(tx$.next.bind(tx$))\n\n  /* Return worker handler */\n  return { tx$, rx$ }\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, fromEvent } from \"rxjs\"\nimport {\n  map,\n  share,\n  switchMapTo,\n  tap,\n  throttle\n} from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Worker message\n */\nexport interface WorkerMessage {\n  type: unknown                        /* Message type */\n  data?: unknown                       /* Message data */\n}\n\n/**\n * Worker handler\n *\n * @template T - Message type\n */\nexport interface WorkerHandler<\n  T extends WorkerMessage\n> {\n  tx$: Subject<T>                      /* Message transmission subject */\n  rx$: Observable<T>                   /* Message receive observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n *\n * @template T - Worker message type\n */\ninterface WatchOptions<T extends WorkerMessage> {\n  tx$: Observable<T>                   /* Message transmission observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch a web worker\n *\n * This function returns an observable that will send all values emitted by the\n * message observable to the web worker. Web worker communication is expected\n * to be bidirectional (request-response) and synchronous. Messages that are\n * emitted during a pending request are throttled, the last one is emitted.\n *\n * @param worker - Web worker\n * @param options - Options\n *\n * @return Worker message observable\n */\nexport function watchWorker<T extends WorkerMessage>(\n  worker: Worker, { tx$ }: WatchOptions<T>\n): Observable<T> {\n\n  /* Intercept messages from worker-like objects */\n  const rx$ = fromEvent<MessageEvent>(worker, \"message\")\n    .pipe<T>(\n      map(({ data }) => data)\n    )\n\n  /* Send and receive messages, return hot observable */\n  return tx$\n    .pipe(\n      throttle(() => rx$, { leading: true, trailing: true }),\n      tap(message => worker.postMessage(message)),\n      switchMapTo(rx$),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  SearchDocument,\n  SearchMetadata,\n  SearchResult\n} from \"integrations/search\"\nimport { h, translate, truncate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Render flag\n */\nconst enum Flag {\n  TEASER = 1,                          /* Render teaser */\n  PARENT = 2                           /* Render as parent */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper function\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a search document\n *\n * @param section - Search document\n * @param flag - Render flags\n *\n * @return Element\n */\nfunction renderSearchDocument(\n  document: SearchDocument & SearchMetadata, flag: Flag\n) {\n  const parent = flag & Flag.PARENT\n  const teaser = flag & Flag.TEASER\n\n  /* Render missing query terms */\n  const missing = Object.keys(document.terms)\n    .filter(key => !document.terms[key])\n    .map(key => [<del>{key}</del>, \" \"])\n    .flat()\n    .slice(0, -1)\n\n  /* Render article or section, depending on flags */\n  const url = document.location\n  return (\n    <a href={url} class=\"md-search-result__link\" tabIndex={-1}>\n      <article\n        class={[\"md-search-result__article\", ...parent\n          ? [\"md-search-result__article--document\"]\n          : []\n        ].join(\" \")}\n        data-md-score={document.score.toFixed(2)}\n      >\n        {parent > 0 && <div class=\"md-search-result__icon md-icon\"></div>}\n        <h1 class=\"md-search-result__title\">{document.title}</h1>\n        {teaser > 0 && document.text.length > 0 &&\n          <p class=\"md-search-result__teaser\">\n            {truncate(document.text, 320)}\n          </p>\n        }\n        {teaser > 0 && missing.length > 0 &&\n          <p class=\"md-search-result__terms\">\n            {translate(\"search.result.term.missing\")}: {...missing}\n          </p>\n        }\n      </article>\n    </a>\n  )\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a search result\n *\n * @param result - Search result\n * @param threshold - Score threshold\n *\n * @return Element\n */\nexport function renderSearchResult(\n  result: SearchResult, threshold: number = Infinity\n) {\n  const docs = [...result]\n\n  /* Find and extract parent article */\n  const parent = docs.findIndex(doc => !doc.location.includes(\"#\"))\n  const [article] = docs.splice(parent, 1)\n\n  /* Determine last index above threshold */\n  let index = docs.findIndex(doc => doc.score < threshold)\n  if (index === -1)\n    index = docs.length\n\n  /* Partition sections */\n  const best = docs.slice(0, index)\n  const more = docs.slice(index)\n\n  /* Render children */\n  const children = [\n    renderSearchDocument(article, Flag.PARENT | +(!parent && index === 0)),\n    ...best.map(section => renderSearchDocument(section, Flag.TEASER)),\n    ...more.length ? [\n      <details class=\"md-search-result__more\">\n        <summary tabIndex={-1}>\n          {more.length > 0 && more.length === 1\n            ? translate(\"search.result.more.one\")\n            : translate(\"search.result.more.other\", more.length)\n          }\n        </summary>\n        {...more.map(section => renderSearchDocument(section, Flag.TEASER))}\n      </details>\n    ] : []\n  ]\n\n  /* Render search result */\n  return (\n    <li class=\"md-search-result__item\">\n      {children}\n    </li>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SourceFacts } from \"patches/source\"\nimport { h } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render source facts\n *\n * @param facts - Source facts\n *\n * @return Element\n */\nexport function renderSource(\n  facts: SourceFacts\n) {\n  return (\n    <ul class=\"md-source__facts\">\n      {facts.map(fact => (\n        <li class=\"md-source__fact\">{fact}</li>\n      ))}\n    </ul>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport * as ClipboardJS from \"clipboard\"\nimport { NEVER, Observable, Subject } from \"rxjs\"\nimport { mapTo, share, tap } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\nimport { renderClipboardButton } from \"templates\"\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  document$: Observable<Document>      /* Document observable */\n  dialog$: Subject<string>             /* Dialog subject */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up clipboard\n *\n * This function implements the Clipboard.js integration and injects a button\n * into all code blocks when the document changes.\n *\n * @param options - Options\n *\n * @return Clipboard observable\n */\nexport function setupClipboard(\n  { document$, dialog$ }: SetupOptions\n): Observable<ClipboardJS.Event> {\n  if (!ClipboardJS.isSupported())\n    return NEVER\n\n  /* Inject 'copy-to-clipboard' buttons */\n  document$.subscribe(() => {\n    const blocks = getElements(\"pre > code\")\n    blocks.forEach((block, index) => {\n      const parent = block.parentElement!\n      parent.id = `__code_${index}`\n      parent.insertBefore(\n        renderClipboardButton(parent.id),\n        block\n      )\n    })\n  })\n\n  /* Initialize clipboard */\n  const clipboard$ = new Observable<ClipboardJS.Event>(subscriber => {\n    new ClipboardJS(\".md-clipboard\").on(\"success\", ev => subscriber.next(ev))\n  })\n    .pipe(\n      share()\n    )\n\n  /* Display notification for clipboard event */\n  clipboard$\n    .pipe(\n      tap(ev => ev.clearSelection()),\n      mapTo(translate(\"clipboard.copied\"))\n    )\n      .subscribe(dialog$)\n\n  /* Return clipboard */\n  return clipboard$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { h, translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a 'copy-to-clipboard' button\n *\n * @param id - Unique identifier\n *\n * @return Element\n */\nexport function renderClipboardButton(id: string) {\n  return (\n    <button\n      class=\"md-clipboard md-icon\"\n      title={translate(\"clipboard.copy\")}\n      data-clipboard-target={`#${id} > code`}\n    ></button>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable, Subject, from, fromEvent, merge, of } from \"rxjs\"\nimport {\n  bufferCount,\n  catchError,\n  debounceTime,\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  filter,\n  map,\n  sample,\n  share,\n  skip,\n  skipUntil,\n  switchMap\n} from \"rxjs/operators\"\n\nimport {\n  Viewport,\n  ViewportOffset,\n  getElement,\n  isAnchorLocation,\n  isLocalLocation,\n  replaceElement,\n  setLocation,\n  setLocationHash,\n  setToggle,\n  setViewportOffset\n} from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * History state\n */\ninterface State {\n  url: URL                             /* State URL */\n  offset?: ViewportOffset              /* State viewport offset */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  document$: Subject<Document>         /* Document subject */\n  location$: Subject<URL>              /* Location subject */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up instant loading\n *\n * When fetching, theoretically, we could use `responseType: \"document\"`, but\n * since all MkDocs links are relative, we need to make sure that the current\n * location matches the document we just loaded. Otherwise any relative links\n * in the document could use the old location.\n *\n * This is the reason why we need to synchronize history events and the process\n * of fetching the document for navigation changes (except `popstate` events):\n *\n * 1. Fetch document via `XMLHTTPRequest`\n * 2. Set new location via `history.pushState`\n * 3. Parse and emit fetched document\n *\n * For `popstate` events, we must not use `history.pushState`, or the forward\n * history will be irreversibly overwritten. In case the request fails, the\n * location change is dispatched regularly.\n *\n * @param options - Options\n */\nexport function setupInstantLoading(\n  urls: string[], { document$, viewport$, location$ }: SetupOptions\n): void {\n\n  /* Disable automatic scroll restoration */\n  if (\"scrollRestoration\" in history)\n    history.scrollRestoration = \"manual\"\n\n  /* Hack: ensure that reloads restore viewport offset */\n  fromEvent(window, \"beforeunload\")\n    .subscribe(() => {\n      history.scrollRestoration = \"auto\"\n    })\n\n  /* Hack: ensure absolute favicon link to omit 404s on document switch */\n  const favicon = getElement<HTMLLinkElement>(`link[rel=\"shortcut icon\"]`)\n  if (typeof favicon !== \"undefined\")\n    favicon.href = favicon.href // tslint:disable-line no-self-assignment\n\n  /* Intercept link clicks and convert to state change */\n  const state$ = fromEvent<MouseEvent>(document.body, \"click\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      switchMap(ev => {\n        if (ev.target instanceof HTMLElement) {\n          const el = ev.target.closest(\"a\")\n          if (\n            el && !el.target &&\n            isLocalLocation(el) &&\n            urls.includes(el.href)\n          ) {\n            if (!isAnchorLocation(el))\n              ev.preventDefault()\n            return of(el)\n          }\n        }\n        return NEVER\n      }),\n      map(el => ({ url: new URL(el.href) })),\n      share<State>()\n    )\n\n  /* Always close search on link click */\n  state$.subscribe(() => {\n    setToggle(\"search\", false)\n  })\n\n  /* Filter state changes to dispatch */\n  const push$ = state$\n    .pipe(\n      filter(({ url }) => !isAnchorLocation(url)),\n      share()\n    )\n\n  /* Intercept popstate events (history back and forward) */\n  const pop$ = fromEvent<PopStateEvent>(window, \"popstate\")\n    .pipe(\n      filter(ev => ev.state !== null),\n      map(ev => ({\n        url: new URL(location.href),\n        offset: ev.state\n      })),\n      share<State>()\n    )\n\n  /* Emit location change */\n  merge(push$, pop$)\n    .pipe(\n      distinctUntilChanged((prev, next) => prev.url.href === next.url.href),\n      map(({ url }) => url)\n    )\n      .subscribe(location$)\n\n  /* Fetch document on location change */\n  const ajax$ = location$\n    .pipe(\n      distinctUntilKeyChanged(\"pathname\"),\n      skip(1),\n      switchMap(url => from(fetch(url.href, {\n        credentials: \"same-origin\"\n      }).then(res => res.text()))\n        .pipe(\n          catchError(() => {\n            setLocation(url)\n            return NEVER\n          })\n        )\n      ),\n      share()\n    )\n\n  /* Set new location as soon as the document was fetched */\n  push$\n    .pipe(\n      sample(ajax$)\n    )\n      .subscribe(({ url }) => {\n        history.pushState({}, \"\", url.toString())\n      })\n\n  /* Parse and emit document */\n  const dom = new DOMParser()\n  ajax$\n    .pipe(\n      map(response => dom.parseFromString(response, \"text/html\"))\n    )\n      .subscribe(document$)\n\n  /* Intercept instant loading */\n  const instant$ = merge(push$, pop$)\n    .pipe(\n      sample(document$)\n    )\n\n  // TODO: this must be combined with search scroll restoration on mobile\n  instant$.subscribe(({ url, offset }) => {\n    if (url.hash && !offset) {\n      setLocationHash(url.hash)\n    } else {\n      setViewportOffset(offset || { y: 0 })\n    }\n  })\n\n  /* Replace document metadata */\n  document$\n    .pipe(\n      skip(1) // Skip initial\n    )\n      .subscribe(({ title, head }) => {\n        document.title = title\n\n        /* Replace meta tags */\n        for (const selector of [\n          `link[rel=\"canonical\"]`,\n          `meta[name=\"author\"]`,\n          `meta[name=\"description\"]`\n        ]) {\n          const next = getElement(selector, head)\n          const prev = getElement(selector, document.head)\n          if (\n            typeof next !== \"undefined\" &&\n            typeof prev !== \"undefined\"\n          ) {\n            replaceElement(prev, next)\n          }\n        }\n\n        /* Finished, dispatch document switch event */\n        document.dispatchEvent(new CustomEvent(\"DOMContentSwitch\"))\n      })\n\n  /* Debounce update of viewport offset */\n  viewport$\n    .pipe(\n      skipUntil(push$),\n      debounceTime(250),\n      distinctUntilKeyChanged(\"offset\")\n    )\n      .subscribe(({ offset }) => {\n        history.replaceState(offset, \"\")\n      })\n\n  /* Set viewport offset from history */\n  merge(state$, pop$)\n    .pipe(\n      bufferCount(2, 1),\n      filter(([prev, next]) => {\n        return prev.url.pathname === next.url.pathname\n            && !isAnchorLocation(next.url)\n      }),\n      map(([, state]) => state)\n    )\n      .subscribe(({ offset }) => {\n        setViewportOffset(offset || { y: 0 })\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport {\n  filter,\n  map,\n  share,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  Key,\n  getActiveElement,\n  getElement,\n  getElements,\n  getToggle,\n  isSusceptibleToKeyboard,\n  setElementFocus,\n  setElementSelection,\n  setToggle,\n  watchKeyboard\n} from \"browser\"\nimport { useComponent } from \"components\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Keyboard mode\n */\nexport type KeyboardMode =\n  | \"global\"                           /* Global */\n  | \"search\"                           /* Search is open */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Keyboard\n */\nexport interface Keyboard extends Key {\n  mode: KeyboardMode                   /* Keyboard mode */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up keyboard\n *\n * This function will set up the keyboard handlers and ensure that keys are\n * correctly propagated. Currently there are two modes:\n *\n * - `global`: This mode is active when the search is closed. It is intended\n *   to assign hotkeys to specific functions of the site. Currently the search,\n *   previous and next page can be triggered.\n *\n * - `search`: This mode is active when the search is open. It maps certain\n *   navigational keys to offer search results that can be entirely navigated\n *   through keyboard input.\n *\n * The keyboard observable is returned and can be used to monitor the keyboard\n * in order toassign further hotkeys to custom functions.\n *\n * @return Keyboard observable\n */\nexport function setupKeyboard(): Observable<Keyboard> {\n  const keyboard$ = watchKeyboard()\n    .pipe(\n      map<Key, Keyboard>(key => ({\n        mode: getToggle(\"search\") ? \"search\" : \"global\",\n        ...key\n      })),\n      filter(({ mode }) => {\n        if (mode === \"global\") {\n          const active = getActiveElement()\n          if (typeof active !== \"undefined\")\n            return !isSusceptibleToKeyboard(active)\n        }\n        return true\n      }),\n      share()\n    )\n\n  /* Set up search keyboard handlers */\n  keyboard$\n    .pipe(\n      filter(({ mode }) => mode === \"search\"),\n      withLatestFrom(\n        useComponent(\"search-query\"),\n        useComponent(\"search-result\")\n      )\n    )\n      .subscribe(([key, query, result]) => {\n        const active = getActiveElement()\n        switch (key.type) {\n\n          /* Enter: prevent form submission */\n          case \"Enter\":\n            if (active === query)\n              key.claim()\n            break\n\n          /* Escape or Tab: close search */\n          case \"Escape\":\n          case \"Tab\":\n            setToggle(\"search\", false)\n            setElementFocus(query, false)\n            break\n\n          /* Vertical arrows: select previous or next search result */\n          case \"ArrowUp\":\n          case \"ArrowDown\":\n            if (typeof active === \"undefined\") {\n              setElementFocus(query)\n            } else {\n              const els = [query, ...getElements(\n                \":not(details) > [href], summary, details[open] [href]\",\n                result\n              )]\n              const i = Math.max(0, (\n                Math.max(0, els.indexOf(active)) + els.length + (\n                  key.type === \"ArrowUp\" ? -1 : +1\n                )\n              ) % els.length)\n              setElementFocus(els[i])\n            }\n\n            /* Prevent scrolling of page */\n            key.claim()\n            break\n\n          /* All other keys: hand to search query */\n          default:\n            if (query !== getActiveElement())\n              setElementFocus(query)\n        }\n      })\n\n  /* Set up global keyboard handlers */\n  keyboard$\n    .pipe(\n      filter(({ mode }) => mode === \"global\"),\n      withLatestFrom(useComponent(\"search-query\"))\n    )\n      .subscribe(([key, query]) => {\n        switch (key.type) {\n\n          /* Open search and select query */\n          case \"f\":\n          case \"s\":\n          case \"/\":\n            setElementFocus(query)\n            setElementSelection(query)\n            key.claim()\n            break\n\n          /* Go to previous page */\n          case \"p\":\n          case \",\":\n            const prev = getElement(\"[href][rel=prev]\")\n            if (typeof prev !== \"undefined\")\n              prev.click()\n            break\n\n          /* Go to next page */\n          case \"n\":\n          case \".\":\n            const next = getElement(\"[href][rel=next]\")\n            if (typeof next !== \"undefined\")\n              next.click()\n            break\n        }\n      })\n\n  /* Return keyboard */\n  return keyboard$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { filter, map, share } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Key\n */\nexport interface Key {\n  type: string                         /* Key type */\n  claim(): void                        /* Key claim */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Check whether an element may receive keyboard input\n *\n * @param el - Element\n *\n * @return Test result\n */\nexport function isSusceptibleToKeyboard(el: HTMLElement): boolean {\n  switch (el.tagName) {\n\n    /* Form elements */\n    case \"INPUT\":\n    case \"SELECT\":\n    case \"TEXTAREA\":\n      return true\n\n    /* Everything else */\n    default:\n      return el.isContentEditable\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch keyboard\n *\n * @return Keyboard observable\n */\nexport function watchKeyboard(): Observable<Key> {\n  return fromEvent<KeyboardEvent>(window, \"keydown\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      map(ev => ({\n        type: ev.key,\n        claim() {\n          ev.preventDefault()\n          ev.stopPropagation()\n        }\n      })),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set element text selection\n *\n * @param el - Element\n */\nexport function setElementSelection(\n  el: HTMLElement\n): void {\n  if (el instanceof HTMLInputElement)\n    el.select()\n  else\n    throw new Error(\"Not implemented\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set search query placeholder\n *\n * @param el - Search query element\n * @param value - Placeholder\n */\nexport function setSearchQueryPlaceholder(\n  el: HTMLInputElement, value: string\n): void {\n  el.placeholder = value\n}\n\n/**\n * Reset search query placeholder\n *\n * @param el - Search query element\n */\nexport function resetSearchQueryPlaceholder(\n  el: HTMLInputElement\n): void {\n  el.placeholder = translate(\"search.placeholder\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  combineLatest,\n  fromEvent,\n  merge,\n  pipe\n} from \"rxjs\"\nimport {\n  delay,\n  distinctUntilChanged,\n  finalize,\n  map,\n  startWith,\n  tap\n} from \"rxjs/operators\"\n\nimport { watchElementFocus } from \"browser\"\nimport { SearchTransformFn, defaultTransform } from \"integrations\"\n\nimport { SearchQuery } from \"../_\"\nimport {\n  resetSearchQueryPlaceholder,\n  setSearchQueryPlaceholder\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  transform?: SearchTransformFn        /* Transformation function */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch search query\n *\n * Note that the focus event which triggers re-reading the current query value\n * is delayed by `1ms` so the input's empty state is allowed to propagate.\n *\n * @param el - Search query element\n * @param options - Options\n *\n * @return Search query observable\n */\nexport function watchSearchQuery(\n  el: HTMLInputElement, { transform }: WatchOptions = {}\n): Observable<SearchQuery> {\n  const fn = transform || defaultTransform\n\n  /* Intercept keyboard events */\n  const value$ = merge(\n    fromEvent(el, \"keyup\"),\n    fromEvent(el, \"focus\").pipe(delay(1))\n  )\n    .pipe(\n      map(() => fn(el.value)),\n      startWith(fn(el.value)),\n      distinctUntilChanged()\n    )\n\n  /* Intercept focus events */\n  const focus$ = watchElementFocus(el)\n\n  /* Combine into single observable */\n  return combineLatest([value$, focus$])\n    .pipe(\n      map(([value, focus]) => ({ value, focus }))\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply search query\n *\n * @param el - Search query element\n *\n * @return Operator function\n */\nexport function applySearchQuery(\n  el: HTMLInputElement\n): MonoTypeOperatorFunction<SearchQuery> {\n  return pipe(\n\n    /* Hide placeholder when search is focused */\n    tap(({ focus }) => {\n      if (focus) {\n        setSearchQueryPlaceholder(el, \"\")\n      } else {\n        resetSearchQueryPlaceholder(el)\n      }\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetSearchQueryPlaceholder(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { OperatorFunction, pipe } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, setToggle } from \"browser\"\nimport {\n  SearchMessage,\n  SearchMessageType,\n  SearchQueryMessage,\n  SearchTransformFn\n} from \"integrations\"\n\nimport {\n  applySearchQuery,\n  watchSearchQuery\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search query\n */\nexport interface SearchQuery {\n  value: string                        /* Query value */\n  focus: boolean                       /* Query focus */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  transform?: SearchTransformFn        /* Transformation function */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search query from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearchQuery(\n  { tx$ }: WorkerHandler<SearchMessage>, options: MountOptions = {}\n): OperatorFunction<HTMLInputElement, SearchQuery> {\n  return pipe(\n    switchMap(el => {\n      const query$ = watchSearchQuery(el, options)\n\n      /* Subscribe worker to search query */\n      query$\n        .pipe(\n          distinctUntilKeyChanged(\"value\"),\n          map(({ value }): SearchQueryMessage => ({\n            type: SearchMessageType.QUERY,\n            data: value\n          }))\n        )\n          .subscribe(tx$.next.bind(tx$))\n\n      /* Toggle search on focus */\n      query$\n        .pipe(\n          distinctUntilKeyChanged(\"focus\")\n        )\n          .subscribe(({ focus }) => {\n            if (focus)\n              setToggle(\"search\", focus)\n          })\n\n      /* Return search query */\n      return query$\n        .pipe(\n          applySearchQuery(el)\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { OperatorFunction, pipe } from \"rxjs\"\nimport {\n  mapTo,\n  startWith,\n  switchMap,\n  switchMapTo,\n  tap\n} from \"rxjs/operators\"\n\nimport { setElementFocus } from \"browser\"\n\nimport { useComponent } from \"../../../_\"\nimport { watchSearchReset } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search reset from source observable\n *\n * @return Operator function\n */\nexport function mountSearchReset(): OperatorFunction<HTMLElement, void> {\n  return pipe(\n    switchMap(el => watchSearchReset(el)\n      .pipe(\n        switchMapTo(useComponent(\"search-query\")),\n        tap(setElementFocus),\n        mapTo(undefined)\n      )\n    ),\n    startWith(undefined)\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { mapTo } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch search reset\n *\n * @param el - Search reset element\n *\n * @return Search reset observable\n */\nexport function watchSearchReset(\n  el: HTMLElement\n): Observable<void> {\n  return fromEvent(el, \"click\")\n    .pipe(\n      mapTo(undefined)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set number of search results\n *\n * @param el - Search result metadata element\n * @param value - Number of results\n */\nexport function setSearchResultMeta(\n  el: HTMLElement, value: number\n): void {\n  switch (value) {\n\n    /* No results */\n    case 0:\n      el.textContent = translate(\"search.result.none\")\n      break\n\n    /* One result */\n    case 1:\n      el.textContent = translate(\"search.result.one\")\n      break\n\n    /* Multiple result */\n    default:\n      el.textContent = translate(\"search.result.other\", value)\n  }\n}\n\n/**\n * Reset number of search results\n *\n * @param el - Search result metadata element\n */\nexport function resetSearchResultMeta(\n  el: HTMLElement\n): void {\n  el.textContent = translate(\"search.result.placeholder\")\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Add an element to the search result list\n *\n * @param el - Search result list element\n * @param child - Search result element\n */\nexport function addToSearchResultList(\n  el: HTMLElement, child: Element\n): void {\n  el.appendChild(child)\n}\n\n/**\n * Reset search result list\n *\n * @param el - Search result list element\n */\nexport function resetSearchResultList(\n  el: HTMLElement\n): void {\n  el.innerHTML = \"\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport {\n  finalize,\n  map,\n  mapTo,\n  observeOn,\n  scan,\n  switchMap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { getElementOrThrow } from \"browser\"\nimport { SearchResult } from \"integrations/search\"\nimport { renderSearchResult } from \"templates\"\n\nimport { SearchQuery } from \"../../query\"\nimport {\n  addToSearchResultList,\n  resetSearchResultList,\n  resetSearchResultMeta,\n  setSearchResultMeta\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply options\n */\ninterface ApplyOptions {\n  query$: Observable<SearchQuery>     /* Search query observable */\n  ready$: Observable<boolean>         /* Search ready observable */\n  fetch$: Observable<boolean>         /* Result fetch observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply search results\n *\n * This function will perform a lazy rendering of the search results, depending\n * on the vertical offset of the search result container. When the scroll offset\n * reaches the bottom of the element, more results are fetched and rendered.\n *\n * @param el - Search result element\n * @param options - Options\n *\n * @return Operator function\n */\nexport function applySearchResult(\n  el: HTMLElement, { query$, ready$, fetch$ }: ApplyOptions\n): MonoTypeOperatorFunction<SearchResult[]> {\n  const list = getElementOrThrow(\".md-search-result__list\", el)\n  const meta = getElementOrThrow(\".md-search-result__meta\", el)\n  return pipe(\n\n    /* Apply search result metadata */\n    withLatestFrom(query$, ready$),\n    map(([result, query]) => {\n      if (query.value) {\n        setSearchResultMeta(meta, result.length)\n      } else {\n        resetSearchResultMeta(meta)\n      }\n      return result\n    }),\n\n    /* Apply search result list */\n    switchMap(result => {\n      const thresholds = [...result.map(([best]) => best.score), 0]\n      return fetch$\n        .pipe(\n\n          /* Defer repaint to next animation frame */\n          observeOn(animationFrameScheduler),\n          scan(index => {\n            const container = el.parentElement!\n            while (index < result.length) {\n              addToSearchResultList(list, renderSearchResult(\n                result[index++], thresholds[index]\n              ))\n              if (container.scrollHeight - container.offsetHeight > 16)\n                break\n            }\n            return index\n          }, 0),\n\n          /* Re-map to search result */\n          mapTo(result),\n\n          /* Reset on complete or error */\n          finalize(() => {\n            resetSearchResultList(list)\n          })\n        )\n      }\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, pipe } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  mapTo,\n  startWith,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, watchElementOffset } from \"browser\"\nimport {\n  SearchMessage,\n  SearchResult,\n  isSearchReadyMessage,\n  isSearchResultMessage\n} from \"integrations\"\n\nimport { SearchQuery } from \"../../query\"\nimport { applySearchResult } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  query$: Observable<SearchQuery>      /* Search query observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search result from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearchResult(\n  { rx$ }: WorkerHandler<SearchMessage>, { query$ }: MountOptions\n): OperatorFunction<HTMLElement, SearchResult[]> {\n  return pipe(\n    switchMap(el => {\n      const container = el.parentElement!\n\n      /* Compute if search is ready */\n      const ready$ = rx$\n        .pipe(\n          filter(isSearchReadyMessage),\n          mapTo(true)\n        )\n\n      /* Compute whether there are more search results to fetch */\n      const fetch$ = watchElementOffset(container)\n        .pipe(\n          map(({ y }) => {\n            return y >= container.scrollHeight - container.offsetHeight - 16\n          }),\n          distinctUntilChanged(),\n          filter(Boolean)\n        )\n\n      /* Apply search results */\n      return rx$\n        .pipe(\n          filter(isSearchResultMessage),\n          map(({ data }) => data),\n          applySearchResult(el, { query$, ready$, fetch$ }),\n          startWith([])\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, of, pipe } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { Viewport, watchViewportAt } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { applyTabs } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Tabs\n */\nexport interface Tabs {\n  hidden: boolean                      /* Whether the tabs are hidden */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  screen$: Observable<boolean>         /* Media screen observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount tabs from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountTabs(\n  { header$, viewport$, screen$ }: MountOptions\n): OperatorFunction<HTMLElement, Tabs> {\n  return pipe(\n    switchMap(el => screen$\n      .pipe(\n        switchMap(screen => {\n\n          /* [screen +]: Mount tabs above screen breakpoint */\n          if (screen) {\n            return watchViewportAt(el, { header$, viewport$ })\n              .pipe(\n                map(({ offset: { y } }) => ({ hidden: y >= 10 })),\n                distinctUntilKeyChanged(\"hidden\"),\n                applyTabs(el)\n              )\n\n          /* [screen -]: Unmount tabs below screen breakpoint */\n          } else {\n            return of({ hidden: true })\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport { finalize, observeOn, tap } from \"rxjs/operators\"\n\nimport { Tabs } from \"../_\"\nimport {\n  resetTabsHidden,\n  setTabsHidden\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply tabs\n *\n * @param el - Tabs element\n *\n * @return Operator function\n */\nexport function applyTabs(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Tabs> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ hidden }) => {\n      setTabsHidden(el, hidden)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetTabsHidden(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set tabs hidden\n *\n * @param el - Tabs element\n * @param value - Whether the element is hidden\n */\nexport function setTabsHidden(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"hidden\" : \"\")\n}\n\n/**\n * Reset tabs hidden\n *\n * @param el - Tabs element\n */\nexport function resetTabsHidden(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set anchor blur\n *\n * @param el - Anchor element\n * @param value - Whether the anchor is blurred\n */\nexport function setAnchorBlur(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"blur\" : \"\")\n}\n\n/**\n * Reset anchor blur\n *\n * @param el - Anchor element\n */\nexport function resetAnchorBlur(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set anchor active\n *\n * @param el - Anchor element\n * @param value - Whether the anchor is active\n */\nexport function setAnchorActive(\n  el: HTMLElement, value: boolean\n): void {\n  el.classList.toggle(\"md-nav__link--active\", value)\n}\n\n/**\n * Reset anchor active\n *\n * @param el - Anchor element\n */\nexport function resetAnchorActive(\n  el: HTMLElement\n): void {\n  el.classList.remove(\"md-nav__link--active\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  Observable,\n  OperatorFunction,\n  combineLatest,\n  of,\n  pipe\n} from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport, getElements } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../../main\"\nimport {\n  Sidebar,\n  applySidebar,\n  watchSidebar\n} from \"../../shared\"\nimport {\n  AnchorList,\n  applyAnchorList,\n  watchAnchorList\n} from \"../anchor\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Table of contents for [tablet -]\n */\ninterface TableOfContentsBelowTablet {} // tslint:disable-line\n\n/**\n * Table of contents for [tablet +]\n */\ninterface TableOfContentsAboveTablet {\n  sidebar: Sidebar                     /* Sidebar */\n  anchors: AnchorList                  /* Anchor list */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Table of contents\n */\nexport type TableOfContents =\n  | TableOfContentsBelowTablet\n  | TableOfContentsAboveTablet\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  tablet$: Observable<boolean>         /* Tablet media observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount table of contents from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountTableOfContents(\n  { header$, main$, viewport$, tablet$ }: MountOptions\n): OperatorFunction<HTMLElement, TableOfContents> {\n  return pipe(\n    switchMap(el => tablet$\n      .pipe(\n        switchMap(tablet => {\n\n          /* [tablet +]: Mount table of contents in sidebar */\n          if (tablet) {\n            const els = getElements<HTMLAnchorElement>(\".md-nav__link\", el)\n\n            /* Watch and apply sidebar */\n            const sidebar$ = watchSidebar(el, { main$, viewport$ })\n              .pipe(\n                applySidebar(el, { header$ })\n              )\n\n            /* Watch and apply anchor list (scroll spy) */\n            const anchors$ = watchAnchorList(els, { header$, viewport$ })\n              .pipe(\n                applyAnchorList(els)\n              )\n\n            /* Combine into single hot observable */\n            return combineLatest([sidebar$, anchors$])\n              .pipe(\n                map(([sidebar, anchors]) => ({ sidebar, anchors }))\n              )\n\n          /* [tablet -]: Unmount table of contents */\n          } else {\n            return of({})\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  bufferCount,\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  finalize,\n  map,\n  observeOn,\n  scan,\n  startWith,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport, getElement, watchElementSize } from \"browser\"\n\nimport { Header } from \"../../../header\"\nimport { AnchorList } from \"../_\"\nimport {\n  resetAnchorActive,\n  resetAnchorBlur,\n  setAnchorActive,\n  setAnchorBlur\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch anchor list\n *\n * This is effectively a scroll-spy implementation which will account for the\n * fixed header and automatically re-calculate anchor offsets when the viewport\n * is resized. The returned observable will only emit if the anchor list needs\n * to be repainted.\n *\n * This implementation tracks an anchor element's entire path starting from its\n * level up to the top-most anchor element, e.g. `[h3, h2, h1]`. Although the\n * Material theme currently doesn't make use of this information, it enables\n * the styling of the entire hierarchy through customization.\n *\n * Note that the current anchor is the last item of the `prev` anchor list.\n *\n * @param els - Anchor elements\n * @param options - Options\n *\n * @return Anchor list observable\n */\nexport function watchAnchorList(\n  els: HTMLAnchorElement[], { header$, viewport$ }: WatchOptions\n): Observable<AnchorList> {\n  const table = new Map<HTMLAnchorElement, HTMLElement>()\n  for (const el of els) {\n    const id = decodeURIComponent(el.hash.substring(1))\n    const target = getElement(`[id=\"${id}\"]`)\n    if (typeof target !== \"undefined\")\n      table.set(el, target)\n  }\n\n  /* Compute necessary adjustment for header */\n  const adjust$ = header$\n    .pipe(\n      map(header => 24 + header.height)\n    )\n\n  /* Compute partition of previous and next anchors */\n  const partition$ = watchElementSize(document.body)\n    .pipe(\n      distinctUntilKeyChanged(\"height\"),\n\n      /* Build index to map anchor paths to vertical offsets */\n      map(() => {\n        let path: HTMLAnchorElement[] = []\n        return [...table].reduce((index, [anchor, target]) => {\n          while (path.length) {\n            const last = table.get(path[path.length - 1])!\n            if (last.tagName >= target.tagName) {\n              path.pop()\n            } else {\n              break\n            }\n          }\n\n          /* If the current anchor is hidden, continue with its parent */\n          let offset = target.offsetTop\n          while (!offset && target.parentElement) {\n            target = target.parentElement\n            offset = target.offsetTop\n          }\n\n          /* Map reversed anchor path to vertical offset */\n          return index.set(\n            [...path = [...path, anchor]].reverse(),\n            offset\n          )\n        }, new Map<HTMLAnchorElement[], number>())\n      }),\n\n      /* Re-compute partition when viewport offset changes */\n      switchMap(index => combineLatest([adjust$, viewport$])\n        .pipe(\n          scan(([prev, next], [adjust, { offset: { y } }]) => {\n\n            /* Look forward */\n            while (next.length) {\n              const [, offset] = next[0]\n              if (offset - adjust < y) {\n                prev = [...prev, next.shift()!]\n              } else {\n                break\n              }\n            }\n\n            /* Look backward */\n            while (prev.length) {\n              const [, offset] = prev[prev.length - 1]\n              if (offset - adjust >= y) {\n                next = [prev.pop()!, ...next]\n              } else {\n                break\n              }\n            }\n\n            /* Return partition */\n            return [prev, next]\n          }, [[], [...index]]),\n          distinctUntilChanged((a, b) => {\n            return a[0] === b[0]\n                && a[1] === b[1]\n          })\n        )\n      )\n    )\n\n  /* Compute and return anchor list migrations */\n  return partition$\n    .pipe(\n      map(([prev, next]) => ({\n        prev: prev.map(([path]) => path),\n        next: next.map(([path]) => path)\n      })),\n\n      /* Extract anchor list migrations */\n      startWith({ prev: [], next: [] }),\n      bufferCount(2, 1),\n      map(([a, b]) => {\n\n        /* Moving down */\n        if (a.prev.length < b.prev.length) {\n          return {\n            prev: b.prev.slice(Math.max(0, a.prev.length - 1), b.prev.length),\n            next: []\n          }\n\n        /* Moving up */\n        } else {\n          return {\n            prev: b.prev.slice(-1),\n            next: b.next.slice(0, b.next.length - a.next.length)\n          }\n        }\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply anchor list\n *\n * @param els - Anchor elements\n *\n * @return Operator function\n */\nexport function applyAnchorList(\n  els: HTMLAnchorElement[]\n): MonoTypeOperatorFunction<AnchorList> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ prev, next }) => {\n\n      /* Look forward */\n      for (const [el] of next) {\n        resetAnchorActive(el)\n        resetAnchorBlur(el)\n      }\n\n      /* Look backward */\n      prev.forEach(([el], index) => {\n        setAnchorActive(el, index === prev.length - 1)\n        setAnchorBlur(el, true)\n      })\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      for (const el of els) {\n        resetAnchorActive(el)\n        resetAnchorBlur(el)\n      }\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable, fromEvent, iif, merge } from \"rxjs\"\nimport { map, mapTo, shareReplay, switchMap } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Check whether the given device is an Apple device\n *\n * @return Test result\n */\nfunction isAppleDevice(): boolean {\n  return /(iPad|iPhone|iPod)/.test(navigator.userAgent)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all elements with `data-md-scrollfix` attributes\n *\n * This is a year-old patch which ensures that overflow scrolling works at the\n * top and bottom of containers on iOS by ensuring a `1px` scroll offset upon\n * the start of a touch event.\n *\n * @see https://bit.ly/2SCtAOO - Original source\n *\n * @param options - Options\n */\nexport function patchScrollfix(\n  { document$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements(\"[data-md-scrollfix]\")),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* Remove marker attribute, so we'll only add the fix once */\n  els$.subscribe(els => {\n    for (const el of els)\n      el.removeAttribute(\"data-md-scrollfix\")\n  })\n\n  /* Patch overflow scrolling on touch start */\n  iif(isAppleDevice, els$, NEVER)\n    .pipe(\n      switchMap(els => merge(...els.map(el => (\n        fromEvent(el, \"touchstart\")\n          .pipe(\n            mapTo(el)\n          )\n      ))))\n    )\n      .subscribe(el => {\n        const top = el.scrollTop\n\n        /* We're at the top of the container */\n        if (top === 0) {\n          el.scrollTop = 1\n\n        /* We're at the bottom of the container */\n        } else if (top + el.offsetHeight === el.scrollHeight) {\n          el.scrollTop = top - 1\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable } from \"rxjs\"\nimport { catchError, filter, map, switchMap } from \"rxjs/operators\"\n\nimport { getElementOrThrow, getElements } from \"browser\"\nimport { renderSource } from \"templates\"\nimport { cache, hash } from \"utilities\"\n\nimport { fetchSourceFactsFromGitHub } from \"./github\"\nimport { fetchSourceFactsFromGitLab } from \"./gitlab\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Source facts\n */\nexport type SourceFacts = string[]\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch source facts\n *\n * @param url - Source repository URL\n *\n * @return Source facts observable\n */\nfunction fetchSourceFacts(\n  url: string\n): Observable<SourceFacts> {\n  const [type] = url.match(/(git(?:hub|lab))/i) || []\n  switch (type.toLowerCase()) {\n\n    /* GitHub repository */\n    case \"github\":\n      const [, user, repo] = url.match(/^.+github\\.com\\/([^\\/]+)\\/?([^\\/]+)?/i)!\n      return fetchSourceFactsFromGitHub(user, repo)\n\n    /* GitLab repository */\n    case \"gitlab\":\n      const [, base, slug] = url.match(/^.+?([^\\/]*gitlab[^\\/]+)\\/(.+?)\\/?$/i)!\n      return fetchSourceFactsFromGitLab(base, slug)\n\n    /* Everything else */\n    default:\n      return NEVER\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch elements containing repository information\n *\n * This function will retrieve the URL from the repository link and try to\n * query data from integrated source code platforms like GitHub or GitLab.\n *\n * @param options - Options\n */\nexport function patchSource(\n  { document$ }: PatchOptions\n): void {\n  document$\n    .pipe(\n      map(() => getElementOrThrow<HTMLAnchorElement>(\".md-source[href]\")),\n      switchMap(({ href }) => (\n        cache(`${hash(href)}`, () => fetchSourceFacts(href))\n      )),\n      filter(facts => facts.length > 0),\n      catchError(() => NEVER)\n    )\n      .subscribe(facts => {\n        for (const el of getElements(\".md-source__repository\")) {\n          if (!el.hasAttribute(\"data-md-state\")) {\n            el.setAttribute(\"data-md-state\", \"done\")\n            el.appendChild(renderSource(facts))\n          }\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Repo, User } from \"github-types\"\nimport { Observable, from } from \"rxjs\"\nimport {\n  defaultIfEmpty,\n  filter,\n  map,\n  share,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { round } from \"utilities\"\n\nimport { SourceFacts } from \"..\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch GitHub source facts\n *\n * @param user - GitHub user\n * @param repo - GitHub repository\n *\n * @return Source facts observable\n */\nexport function fetchSourceFactsFromGitHub(\n  user: string, repo?: string\n): Observable<SourceFacts> {\n  const url = typeof repo !== \"undefined\"\n    ? `https://api.github.com/repos/${user}/${repo}`\n    : `https://api.github.com/users/${user}`\n  return from(fetch(url))\n    .pipe(\n      filter(res => res.status === 200),\n      switchMap(res => res.json()),\n      map(data => {\n\n        /* GitHub repository */\n        if (typeof repo !== \"undefined\") {\n          const { stargazers_count, forks_count }: Repo = data\n          return [\n            `${round(stargazers_count!)} Stars`,\n            `${round(forks_count!)} Forks`\n          ]\n\n        /* GitHub user/organization */\n        } else {\n          const { public_repos }: User = data\n          return [\n            `${round(public_repos!)} Repositories`\n          ]\n        }\n      }),\n      defaultIfEmpty([]),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { ProjectSchema } from \"gitlab\"\nimport { Observable, from } from \"rxjs\"\nimport {\n  defaultIfEmpty,\n  filter,\n  map,\n  share,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { round } from \"utilities\"\n\nimport { SourceFacts } from \"..\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch GitLab source facts\n *\n * @param base - GitLab base\n * @param project - GitLab project\n *\n * @return Source facts observable\n */\nexport function fetchSourceFactsFromGitLab(\n  base: string, project: string\n): Observable<SourceFacts> {\n  const url = `https://${base}/api/v4/projects/${encodeURIComponent(project)}`\n  return from(fetch(url))\n    .pipe(\n      filter(res => res.status === 200),\n      switchMap(res => res.json()),\n      map(({ star_count, forks_count }: ProjectSchema) => ([\n        `${round(star_count)} Stars`,\n        `${round(forks_count)} Forks`\n      ])),\n      defaultIfEmpty([]),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, defer, of } from \"rxjs\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Cache the last value emitted by an observable in session storage\n *\n * If the key is not found in session storage, the factory is executed and the\n * latest value emitted will automatically be persisted to sessions storage.\n * Note that the values emitted by the returned observable must be serializable\n * as `JSON`, or data will be lost.\n *\n * @template T - Value type\n *\n * @param key - Cache key\n * @param factory - Observable factory\n *\n * @return Value observable\n */\nexport function cache<T>(\n  key: string, factory: () => Observable<T>\n): Observable<T> {\n  return defer(() => {\n    const data = sessionStorage.getItem(key)\n    if (data) {\n      return of(JSON.parse(data) as T)\n\n    /* Retrieve value from observable factory and write to storage */\n    } else {\n      const value$ = factory()\n      value$.subscribe(value => {\n        try {\n          sessionStorage.setItem(key, JSON.stringify(value))\n        } catch (err) {\n          /* Uncritical, just swallow */\n        }\n      })\n\n      /* Return value */\n      return value$\n    }\n  })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n// DISCLAIMER: this file is still WIP. There're some refactoring opportunities\n// which must be tackled after we gathered some feedback on v5.\n// tslint:disable\n\nimport \"focus-visible\"\n\nimport {\n  merge,\n  combineLatest,\n  animationFrameScheduler,\n  fromEvent,\n  from,\n  defer,\n  of,\n  NEVER\n} from \"rxjs\"\nimport {\n  delay,\n  switchMap,\n  tap,\n  filter,\n  withLatestFrom,\n  observeOn,\n  take,\n  shareReplay,\n  catchError,\n  map,\n  bufferCount,\n  distinctUntilKeyChanged,\n  mapTo,\n  startWith,\n  combineLatestWith,\n  distinctUntilChanged\n} from \"rxjs/operators\"\n\nimport {\n  watchToggle,\n  setToggle,\n  getElements,\n  watchMedia,\n  watchDocument,\n  watchLocation,\n  watchLocationHash,\n  watchViewport,\n  isLocalLocation,\n  setLocationHash,\n  watchLocationBase,\n  getElement\n} from \"browser\"\nimport {\n  mountHeader,\n  mountMain,\n  mountNavigation,\n  mountSearch,\n  mountTableOfContents,\n  mountTabs,\n  useComponent,\n  setupComponents,\n  mountSearchQuery,\n  mountSearchReset,\n  mountSearchResult\n} from \"components\"\nimport {\n  setupClipboard,\n  setupDialog,\n  setupKeyboard,\n  setupInstantLoading,\n  setupSearchWorker,\n  SearchIndex,\n  SearchIndexPipeline\n} from \"integrations\"\nimport {\n  patchCodeBlocks,\n  patchTables,\n  patchDetails,\n  patchScrollfix,\n  patchSource,\n  patchScripts\n} from \"patches\"\nimport { isConfig } from \"utilities\"\n\n/* ------------------------------------------------------------------------- */\n\n/* Denote that JavaScript is available */\ndocument.documentElement.classList.remove(\"no-js\")\ndocument.documentElement.classList.add(\"js\")\n\n/* Test for iOS */\nif (navigator.userAgent.match(/(iPad|iPhone|iPod)/g))\n  document.documentElement.classList.add(\"ios\")\n\n/**\n * Set scroll lock\n *\n * @param el - Scrollable element\n * @param value - Vertical offset\n */\nexport function setScrollLock(\n  el: HTMLElement, value: number\n): void {\n  el.setAttribute(\"data-md-state\", \"lock\")\n  el.style.top = `-${value}px`\n}\n\n/**\n * Reset scroll lock\n *\n * @param el - Scrollable element\n */\nexport function resetScrollLock(\n  el: HTMLElement\n): void {\n  const value = -1 * parseInt(el.style.top, 10)\n  el.removeAttribute(\"data-md-state\")\n  el.style.top = \"\"\n  if (value)\n    window.scrollTo(0, value)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Initialize Material for MkDocs\n *\n * @param config - Configuration\n */\nexport function initialize(config: unknown) {\n  if (!isConfig(config))\n    throw new SyntaxError(`Invalid configuration: ${JSON.stringify(config)}`)\n\n  /* Set up subjects */\n  const document$ = watchDocument()\n  const location$ = watchLocation()\n\n  /* Set up user interface observables */\n  const base$     = watchLocationBase(config.base, { location$ })\n  const hash$     = watchLocationHash()\n  const viewport$ = watchViewport()\n  const tablet$   = watchMedia(\"(min-width: 960px)\")\n  const screen$   = watchMedia(\"(min-width: 1220px)\")\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Set up component bindings */\n  setupComponents([\n    \"announce\",                        /* Announcement bar */\n    \"container\",                       /* Container */\n    \"header\",                          /* Header */\n    \"header-title\",                    /* Header title */\n    \"main\",                            /* Main area */\n    \"navigation\",                      /* Navigation */\n    \"search\",                          /* Search */\n    \"search-query\",                    /* Search input */\n    \"search-reset\",                    /* Search reset */\n    \"search-result\",                   /* Search results */\n    \"skip\",                            /* Skip link */\n    \"tabs\",                            /* Tabs */\n    \"toc\"                              /* Table of contents */\n  ], { document$ })\n\n  const keyboard$ = setupKeyboard()\n\n  // Hack: only make code blocks focusable on non-touch devices\n  if (matchMedia(\"(hover)\").matches)\n    patchCodeBlocks({ document$, viewport$ })\n  patchDetails({ document$, hash$ })\n  patchScripts({ document$ })\n  patchSource({ document$ })\n  patchTables({ document$ })\n\n  /* Force 1px scroll offset to trigger overflow scrolling */\n  patchScrollfix({ document$ })\n\n  /* Set up clipboard and dialog */\n  const dialog$ = setupDialog()\n  const clipboard$ = setupClipboard({ document$, dialog$ })\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Create header observable */\n  const header$ = useComponent(\"header\")\n    .pipe(\n      mountHeader({ document$, viewport$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  const main$ = useComponent(\"main\")\n    .pipe(\n      mountMain({ header$, viewport$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  const navigation$ = useComponent(\"navigation\")\n    .pipe(\n      mountNavigation({ header$, main$, viewport$, screen$ }),\n      shareReplay({ bufferSize: 1, refCount: true }) // shareReplay because there might be late subscribers\n    )\n\n  const toc$ = useComponent(\"toc\")\n    .pipe(\n      mountTableOfContents({ header$, main$, viewport$, tablet$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  const tabs$ = useComponent(\"tabs\")\n    .pipe(\n      mountTabs({ header$, viewport$, screen$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Search worker - only if search is present */\n  const worker$ = useComponent(\"search\")\n    .pipe(\n      switchMap(() => defer(() => {\n        const index = config.search && config.search.index\n          ? config.search.index\n          : undefined\n\n        /* Fetch index if it wasn't passed explicitly */\n        const index$ = (\n          typeof index !== \"undefined\"\n            ? from(index)\n            : base$\n                .pipe(\n                  switchMap(base => fetch(`${base}/search/search_index.json`, {\n                    credentials: \"same-origin\"\n                  }).then(res => res.json())) // SearchIndex\n                )\n        )\n\n        return of(setupSearchWorker(config.search.worker, {\n          base$, index$\n        }))\n      }))\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Mount search query */\n  const search$ = worker$\n    .pipe(\n      switchMap(worker => {\n        const query$ = useComponent<HTMLInputElement>(\"search-query\")\n          .pipe(\n            mountSearchQuery(worker, { transform: config.search.transform }),\n            shareReplay({ bufferSize: 1, refCount: true })\n          )\n\n        /* Mount search reset */\n        const reset$ = useComponent(\"search-reset\")\n          .pipe(\n            mountSearchReset(),\n            shareReplay({ bufferSize: 1, refCount: true })\n          )\n\n        /* Mount search result */\n        const result$ = useComponent(\"search-result\")\n          .pipe(\n            mountSearchResult(worker, { query$ }),\n            shareReplay({ bufferSize: 1, refCount: true })\n          )\n\n        return useComponent(\"search\")\n          .pipe(\n            mountSearch(worker, { query$, reset$, result$ }),\n          )\n      }),\n      catchError(() => {\n        useComponent(\"search\")\n          .subscribe(el => el.hidden = true) // TODO: Hack\n        return NEVER\n      }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  // // put into search...\n  hash$\n    .pipe(\n      tap(() => setToggle(\"search\", false)),\n      delay(125), // ensure that it runs after the body scroll reset...\n    )\n      .subscribe(hash => setLocationHash(`#${hash}`))\n\n  // TODO: scroll restoration must be centralized\n  combineLatest([\n    watchToggle(\"search\"),\n    tablet$,\n  ])\n    .pipe(\n      withLatestFrom(viewport$),\n      switchMap(([[toggle, tablet], { offset: { y }}]) => {\n        const active = toggle && !tablet\n        return document$\n          .pipe(\n            delay(active ? 400 : 100),\n            observeOn(animationFrameScheduler),\n            tap(({ body }) => active\n              ? setScrollLock(body, y)\n              : resetScrollLock(body)\n            )\n          )\n      })\n    )\n      .subscribe()\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Always close drawer on click */\n  fromEvent<MouseEvent>(document.body, \"click\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      filter(ev => {\n        if (ev.target instanceof HTMLElement) {\n          const el = ev.target.closest(\"a\") // TODO: abstract as link click?\n          if (el && isLocalLocation(el)) {\n            return true\n          }\n        }\n        return false\n      })\n    )\n      .subscribe(() => {\n        setToggle(\"drawer\", false)\n      })\n\n  /* Enable instant loading, if not on file:// protocol */\n  if (\n    config.features.includes(\"navigation.instant\") &&\n    location.protocol !== \"file:\"\n  ) {\n    const dom = new DOMParser()\n\n    /* Fetch sitemap and extract URL whitelist */\n    base$\n      .pipe(\n        switchMap(base => from(fetch(`${base}/sitemap.xml`)\n          .then(res => res.text())\n          .then(text => dom.parseFromString(text, \"text/xml\"))\n        )),\n        withLatestFrom(base$),\n        map(([document, base]) => {\n          const urls = getElements(\"loc\", document)\n            .map(node => node.textContent!)\n\n          // Hack: This is a temporary fix to normalize instant loading lookup\n          // on localhost and Netlify previews. If this approach proves to be\n          // suitable, we'll refactor URL whitelisting anyway. We take the two\n          // shortest URLs and determine the common prefix to isolate the\n          // domain. If there're no two domains, we just leave it as-is, as\n          // there isn't anything to be loaded anway.\n          if (urls.length > 1) {\n            const [a, b] = urls.sort((a, b) => a.length - b.length)\n\n            /* Determine common prefix */\n            let index = 0\n            if (a === b)\n              index = a.length\n            else\n              while (a.charAt(index) === b.charAt(index))\n                index++\n\n            /* Replace common prefix (i.e. base) with effective base */\n            for (let i = 0; i < urls.length; i++)\n              urls[i] = urls[i].replace(a.slice(0, index), `${base}/`)\n          }\n          return urls\n        })\n      )\n        .subscribe(urls => {\n          setupInstantLoading(urls, { document$, location$, viewport$ })\n        })\n  }\n\n  /* ----------------------------------------------------------------------- */\n\n  // Make indeterminate toggles indeterminate to expand navigation on screen\n  document$.subscribe(() => {\n    const toggles = getElements<HTMLInputElement>(\"[data-md-state=indeterminate]\")\n    for (const toggle of toggles) {\n      toggle.dataset.mdState = \"\"\n      toggle.indeterminate = true\n      toggle.checked = false\n    }\n  })\n\n  // Auto hide header - this is still experimental, so there might be some\n  // opportunities for refactoring, but we'll address them when this feature\n  // got some feedback from the community.\n  if (config.features.includes(\"header.autohide\")) {\n\n    // Threshold for header-hiding - always show if scrolled less than 400px.\n    // Also, search is not allowed to be active. Maybe make this dynamic.\n    const threshold$ = viewport$\n      .pipe(\n        map(({ offset }) => offset.y > 400),\n        combineLatestWith(watchToggle(\"search\")),\n        map(([threshold, search]) => threshold && !search),\n        distinctUntilChanged()\n      )\n\n    // Scroll direction (true = down, false = up) + inflection point\n    const direction$ = viewport$\n      .pipe(\n        map(({ offset }) => offset.y),\n        bufferCount(2, 1),\n        map(([a, b]) => [a < b, b] as const),\n        distinctUntilKeyChanged(0)\n      )\n\n    // When the threshold is exceeded, and the search is not active, subscribe\n    // to the direction observable (always do a new subscription), and track\n    // scroll progress.\n    const hide$ = threshold$\n      .pipe(\n        switchMap(active => !active\n          ? of(false)\n          : direction$\n              .pipe(\n                combineLatestWith(viewport$),\n                filter(([[, y], { offset }]) => Math.abs(y - offset.y) > 100),\n                map(([[direction]]) => direction)\n              )\n        ),\n        distinctUntilChanged()\n      )\n\n    // Set header state depending on main state. There's still some possibility\n    // for improvement, as the page seems to jump when focusing the unfocused\n    // search. This would mean we would need to delay the focus/change event\n    // until the header is focussed, which we need to address in a refactoring.\n    hide$\n      .pipe(\n        combineLatestWith(main$),\n        map(([hide, main]) => main.active\n          ? hide ? \"hidden\" : \"shadow\"\n          : \"\"\n        ),\n        combineLatestWith(useComponent(\"header\"))\n      )\n        .subscribe(([state, el]) => {\n          el.setAttribute(\"data-md-state\", state)\n        })\n  }\n\n  /* ----------------------------------------------------------------------- */\n\n  const state = {\n\n    /* Browser observables */\n    document$,\n    location$,\n    viewport$,\n\n    /* Component observables */\n    header$,\n    main$,\n    navigation$,\n    search$,\n    tabs$,\n    toc$,\n\n    /* Integration observables */\n    clipboard$,\n    keyboard$,\n    dialog$\n  }\n\n  /* Subscribe to all observables */\n  merge(...Object.values(state))\n    .subscribe()\n  return state\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchIndex, SearchTransformFn } from \"integrations\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Feature flags\n */\nexport type Feature =\n  | \"header.autohide\"                  /* Hide header */\n  | \"navigation.tabs\"                  /* Tabs navigation */\n  | \"navigation.instant\"               /* Instant loading */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Configuration\n */\nexport interface Config {\n  base: string                         /* Base URL */\n  features: Feature[]                  /* Feature flags */\n  search: {\n    worker: string                     /* Worker URL */\n    index?: Promise<SearchIndex>       /* Promise resolving with index */\n    transform?: SearchTransformFn      /* Transformation function */\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Ensure that the given value is a valid configuration\n *\n * We could use `jsonschema` or any other schema validation framework, but that\n * would just add more bloat to the bundle, so we'll keep it plain and simple.\n *\n * @param config - Configuration\n *\n * @return Test result\n */\nexport function isConfig(config: any): config is Config {\n  return typeof config === \"object\"\n      && typeof config.base === \"string\"\n      && typeof config.features === \"object\"\n      && typeof config.search === \"object\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { ReplaySubject, Subject, fromEvent } from \"rxjs\"\nimport { mapTo } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch document\n *\n * Documents must be implemented as subjects, so all downstream observables are\n * automatically updated when a new document is emitted. This enabled features\n * like instant loading.\n *\n * @return Document subject\n */\nexport function watchDocument(): Subject<Document> {\n  const document$ = new ReplaySubject<Document>()\n  fromEvent(document, \"DOMContentLoaded\")\n    .pipe(\n      mapTo(document)\n    )\n      .subscribe(document$)\n\n  /* Return document */\n  return document$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { map, shareReplay, take } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  location$: Observable<URL>           /* Location observable */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location base\n *\n * @return Location base observable\n */\nexport function watchLocationBase(\n  base: string, { location$ }: WatchOptions\n): Observable<string> {\n  return location$\n    .pipe(\n      take(1),\n      map(({ href }) => new URL(base, href)\n        .toString()\n        .replace(/\\/$/, \"\")\n      ),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, combineLatest } from \"rxjs\"\nimport { distinctUntilKeyChanged, map } from \"rxjs/operators\"\n\nimport { Viewport, getElements } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `code` elements\n *\n * This function will make overflowing code blocks focusable via keyboard, so\n * they can be scrolled without a mouse.\n *\n * @param options - Options\n */\nexport function patchCodeBlocks(\n  { document$, viewport$ }: MountOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements<HTMLTableElement>(\"pre > code\"))\n    )\n\n  /* Observe viewport size only */\n  const size$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\")\n    )\n\n  /* Make overflowing elements focusable */\n  combineLatest([els$, size$])\n    .subscribe(([els]) => {\n      for (const el of els) {\n        if (el.scrollWidth > el.clientWidth)\n          el.setAttribute(\"tabindex\", \"0\")\n        else\n          el.removeAttribute(\"tabindex\")\n      }\n    })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport {\n  filter,\n  map,\n  switchMapTo,\n  tap\n} from \"rxjs/operators\"\n\nimport {\n  getElement,\n  getElements,\n  watchMedia\n} from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n  hash$: Observable<string>            /* Location hash observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `details` elements\n *\n * This function will ensure that all `details` tags are opened prior to\n * printing, so the whole content of the page is included, and on anchor jumps.\n *\n * @param options - Options\n */\nexport function patchDetails(\n  { document$, hash$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements<HTMLDetailsElement>(\"details\"))\n    )\n\n  /* Open all details before printing */\n  merge(\n    watchMedia(\"print\").pipe(filter(Boolean)),  /* Webkit */\n    fromEvent(window, \"beforeprint\")            /* IE, FF */\n  )\n    .pipe(\n      switchMapTo(els$)\n    )\n      .subscribe(els => {\n        for (const el of els)\n          el.setAttribute(\"open\", \"\")\n      })\n\n  /* Open parent details and fix anchor jump */\n  hash$\n    .pipe(\n      map(id => getElement(`[id=\"${id}\"]`)!),\n      filter(el => typeof el !== \"undefined\"),\n      tap(el => {\n        const details = el.closest(\"details\")\n        if (details && !details.open)\n          details.setAttribute(\"open\", \"\")\n      })\n    )\n      .subscribe(el => el.scrollIntoView())\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { EMPTY, Observable, noop, of } from \"rxjs\"\nimport {\n  concatMap,\n  map,\n  skip,\n  switchMap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  createElement,\n  getElements,\n  replaceElement\n} from \"browser\"\nimport { useComponent } from \"components\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `script` elements\n *\n * This function must be run after a document switch, which means the first\n * emission must be ignored.\n *\n * @param options - Options\n */\nexport function patchScripts(\n  { document$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      skip(1),\n      withLatestFrom(useComponent(\"container\")),\n      map(([, el]) => getElements<HTMLScriptElement>(\"script\", el))\n    )\n\n  /* Evaluate all scripts via replacement in order */\n  els$\n    .pipe(\n      switchMap(els => of(...els)),\n      concatMap(el => {\n        const script = createElement(\"script\")\n        if (el.src) {\n          script.src = el.src\n          replaceElement(el, script)\n\n          /* Complete when script is loaded */\n          return new Observable(observer => {\n            script.onload = () => observer.complete()\n          })\n\n        /* Complete immediately */\n        } else {\n          script.textContent = el.textContent!\n          replaceElement(el, script)\n          return EMPTY\n        }\n      })\n    )\n      .subscribe(noop)\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { map } from \"rxjs/operators\"\n\nimport {\n  createElement,\n  getElements,\n  replaceElement\n} from \"browser\"\nimport { renderTable } from \"templates\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `table` elements\n *\n * This function will re-render all tables by wrapping them to improve overflow\n * scrolling on smaller screen sizes.\n *\n * @param options - Options\n */\nexport function patchTables(\n  { document$ }: MountOptions\n): void {\n  const sentinel = createElement(\"table\")\n  document$\n    .pipe(\n      map(() => getElements<HTMLTableElement>(\"table:not([class])\"))\n    )\n      .subscribe(els => {\n        for (const el of els) {\n          replaceElement(el, sentinel)\n          replaceElement(sentinel, renderTable(el))\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { h } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a table inside a wrapper to improve scrolling on mobile\n *\n * @param table - Table element\n *\n * @return Element\n */\nexport function renderTable(\n  table: HTMLTableElement\n) {\n  return (\n    <div class=\"md-typeset__scrollwrap\">\n      <div class=\"md-typeset__table\">\n        {table}\n      </div>\n    </div>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Subject, animationFrameScheduler, noop, of } from \"rxjs\"\nimport {\n  delay,\n  map,\n  observeOn,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { createElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  duration?: number                    /* Display duration (default: 2s) */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up dialog\n *\n * @param options - Options\n *\n * @return Dialog observable\n */\nexport function setupDialog(\n  { duration }: SetupOptions = {}\n): Subject<string> {\n  const dialog$ = new Subject<string>()\n\n  /* Create dialog */\n  const dialog = createElement(\"div\")                                           // TODO: improve scoping\n  dialog.classList.add(\"md-dialog\", \"md-typeset\")\n\n  /* Display dialog */\n  dialog$\n    .pipe(\n      switchMap(text => of(document.body) // useComponent(\"container\")\n        .pipe(\n          map(container => container.appendChild(dialog)),\n          observeOn(animationFrameScheduler),\n          delay(1), // Strangley it doesnt work when we push things to the new animation frame...\n          tap(el => {\n            el.innerHTML = text\n            el.setAttribute(\"data-md-state\", \"open\")\n          }),\n          delay(duration || 2000),\n          tap(el => el.removeAttribute(\"data-md-state\")),\n          delay(400),\n          tap(el => {\n            el.innerHTML = \"\"\n            el.remove()\n          })\n        )\n      )\n    )\n      .subscribe(noop)\n\n  /* Return dialog */\n  return dialog$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, of, pipe } from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { Header } from \"../header\"\nimport { Main } from \"../main\"\nimport {\n  Sidebar,\n  applySidebar,\n  watchSidebar\n} from \"../shared\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Navigation for [screen -]\n */\ninterface NavigationBelowScreen {} // tslint:disable-line\n\n/**\n * Navigation for [screen +]\n */\ninterface NavigationAboveScreen {\n  sidebar: Sidebar                     /* Sidebar */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Navigation\n */\nexport type Navigation =\n  | NavigationBelowScreen\n  | NavigationAboveScreen\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  screen$: Observable<boolean>         /* Screen media observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount navigation from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountNavigation(\n  { header$, main$, viewport$, screen$ }: MountOptions\n): OperatorFunction<HTMLElement, Navigation> {\n  return pipe(\n    switchMap(el => screen$\n      .pipe(\n        switchMap(screen => {\n\n          /* [screen +]: Mount navigation in sidebar */\n          if (screen) {\n            return watchSidebar(el, { main$, viewport$ })\n              .pipe(\n                applySidebar(el, { header$ }),\n                map(sidebar => ({ sidebar }))\n              )\n\n          /* [screen -]: Mount navigation in drawer */\n          } else {\n            return of({})\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, combineLatest, pipe } from \"rxjs\"\nimport {\n  filter,\n  map,\n  mapTo,\n  sample,\n  startWith,\n  switchMap,\n  take\n} from \"rxjs/operators\"\n\nimport { WorkerHandler } from \"browser\"\nimport {\n  SearchMessage,\n  SearchResult,\n  isSearchQueryMessage,\n  isSearchReadyMessage\n} from \"integrations/search\"\n\nimport { SearchQuery } from \"../query\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search status\n */\nexport type SearchStatus =\n  | \"waiting\"                          /* Search waiting for initialization */\n  | \"ready\"                            /* Search ready */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Search\n */\nexport interface Search {\n  status: SearchStatus                 /* Search status */\n  query: SearchQuery                   /* Search query */\n  result: SearchResult[]               /* Search result list */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  query$: Observable<SearchQuery>      /* Search query observable */\n  reset$: Observable<void>             /* Search reset observable */\n  result$: Observable<SearchResult[]>  /* Search result observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearch(\n  { rx$, tx$ }: WorkerHandler<SearchMessage>,\n  { query$, reset$, result$ }: MountOptions\n): OperatorFunction<HTMLElement, Search> {\n  return pipe(\n    switchMap(() => {\n\n      /* Compute search status */\n      const status$ = rx$\n        .pipe(\n          filter(isSearchReadyMessage),\n          mapTo<SearchStatus>(\"ready\"),\n          startWith(\"waiting\")\n        ) as Observable<SearchStatus>\n\n      /* Re-emit the latest query when search is ready */\n      tx$\n        .pipe(\n          filter(isSearchQueryMessage),\n          sample(status$),\n          take(1)\n        )\n          .subscribe(tx$.next.bind(tx$))\n\n      /* Combine into single observable */\n      return combineLatest([status$, query$, result$, reset$])\n        .pipe(\n          map(([status, query, result]) => ({\n            status,\n            query,\n            result\n          }))\n        )\n    })\n  )\n}\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/assets/javascripts/bundle.e9c9f54f.min.js b/assets/javascripts/bundle.e9c9f54f.min.js
deleted file mode 100644
index 1a6019e8..00000000
--- a/assets/javascripts/bundle.e9c9f54f.min.js
+++ /dev/null
@@ -1,2 +0,0 @@
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\t// install a JSONP callback for chunk loading\n \tfunction webpackJsonpCallback(data) {\n \t\tvar chunkIds = data[0];\n \t\tvar moreModules = data[1];\n \t\tvar executeModules = data[2];\n\n \t\t// add \"moreModules\" to the modules object,\n \t\t// then flag all \"chunkIds\" as loaded and fire callback\n \t\tvar moduleId, chunkId, i = 0, resolves = [];\n \t\tfor(;i < chunkIds.length; i++) {\n \t\t\tchunkId = chunkIds[i];\n \t\t\tif(Object.prototype.hasOwnProperty.call(installedChunks, chunkId) && installedChunks[chunkId]) {\n \t\t\t\tresolves.push(installedChunks[chunkId][0]);\n \t\t\t}\n \t\t\tinstalledChunks[chunkId] = 0;\n \t\t}\n \t\tfor(moduleId in moreModules) {\n \t\t\tif(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {\n \t\t\t\tmodules[moduleId] = moreModules[moduleId];\n \t\t\t}\n \t\t}\n \t\tif(parentJsonpFunction) parentJsonpFunction(data);\n\n \t\twhile(resolves.length) {\n \t\t\tresolves.shift()();\n \t\t}\n\n \t\t// add entry modules from loaded chunk to deferred list\n \t\tdeferredModules.push.apply(deferredModules, executeModules || []);\n\n \t\t// run deferred modules when all chunks ready\n \t\treturn checkDeferredModules();\n \t};\n \tfunction checkDeferredModules() {\n \t\tvar result;\n \t\tfor(var i = 0; i < deferredModules.length; i++) {\n \t\t\tvar deferredModule = deferredModules[i];\n \t\t\tvar fulfilled = true;\n \t\t\tfor(var j = 1; j < deferredModule.length; j++) {\n \t\t\t\tvar depId = deferredModule[j];\n \t\t\t\tif(installedChunks[depId] !== 0) fulfilled = false;\n \t\t\t}\n \t\t\tif(fulfilled) {\n \t\t\t\tdeferredModules.splice(i--, 1);\n \t\t\t\tresult = __webpack_require__(__webpack_require__.s = deferredModule[0]);\n \t\t\t}\n \t\t}\n\n \t\treturn result;\n \t}\n\n \t// The module cache\n \tvar installedModules = {};\n\n \t// object to store loaded and loading chunks\n \t// undefined = chunk not loaded, null = chunk preloaded/prefetched\n \t// Promise = chunk loading, 0 = chunk loaded\n \tvar installedChunks = {\n \t\t0: 0\n \t};\n\n \tvar deferredModules = [];\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__webpack_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __webpack_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__webpack_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \tvar jsonpArray = window[\"webpackJsonp\"] = window[\"webpackJsonp\"] || [];\n \tvar oldJsonpFunction = jsonpArray.push.bind(jsonpArray);\n \tjsonpArray.push = webpackJsonpCallback;\n \tjsonpArray = jsonpArray.slice();\n \tfor(var i = 0; i < jsonpArray.length; i++) webpackJsonpCallback(jsonpArray[i]);\n \tvar parentJsonpFunction = oldJsonpFunction;\n\n\n \t// add entry module to deferred list\n \tdeferredModules.push([51,1]);\n \t// run deferred modules when ready\n \treturn checkDeferredModules();\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve an element matching the query selector\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Element or nothing\n */\nexport function getElement<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T | undefined {\n  return node.querySelector<T>(selector) || undefined\n}\n\n/**\n * Retrieve an element matching a query selector or throw a reference error\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Element\n */\nexport function getElementOrThrow<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T {\n  const el = getElement<T>(selector, node)\n  if (typeof el === \"undefined\")\n    throw new ReferenceError(\n      `Missing element: expected \"${selector}\" to be present`\n    )\n  return el\n}\n\n/**\n * Retrieve the currently active element\n *\n * @return Element or nothing\n */\nexport function getActiveElement(): HTMLElement | undefined {\n  return document.activeElement instanceof HTMLElement\n    ? document.activeElement\n    : undefined\n}\n\n/**\n * Retrieve all elements matching the query selector\n *\n * @template T - Element type\n *\n * @param selector - Query selector\n * @param node - Node of reference\n *\n * @return Elements\n */\nexport function getElements<T extends HTMLElement>(\n  selector: string, node: ParentNode = document\n): T[] {\n  return Array.from(node.querySelectorAll<T>(selector))\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Create an element\n *\n * @template T - Tag name type\n *\n * @param tagName - Tag name\n *\n * @return Element\n */\nexport function createElement<T extends keyof HTMLElementTagNameMap>(\n  tagName: T\n): HTMLElementTagNameMap[T] {\n  return document.createElement(tagName)\n}\n\n/**\n * Replace an element with another element\n *\n * @param source - Source element\n * @param target - Target element\n */\nexport function replaceElement(\n  source: HTMLElement, target: Node\n): void {\n  source.replaceWith(target)\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\nimport { getActiveElement } from \"../_\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set element focus\n *\n * @param el - Element\n * @param value - Whether the element should be focused\n */\nexport function setElementFocus(\n  el: HTMLElement, value: boolean = true\n): void {\n  if (value)\n    el.focus()\n  else\n    el.blur()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element focus\n *\n * @param el - Element\n *\n * @return Element focus observable\n */\nexport function watchElementFocus(\n  el: HTMLElement\n): Observable<boolean> {\n  return merge(\n    fromEvent<FocusEvent>(el, \"focus\"),\n    fromEvent<FocusEvent>(el, \"blur\")\n  )\n    .pipe(\n      map(({ type }) => type === \"focus\"),\n      startWith(el === getActiveElement())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Element offset\n */\nexport interface ElementOffset {\n  x: number                            /* Horizontal offset */\n  y: number                            /* Vertical offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve element offset\n *\n * @param el - Element\n *\n * @return Element offset\n */\nexport function getElementOffset(el: HTMLElement): ElementOffset {\n  return {\n    x: el.scrollLeft,\n    y: el.scrollTop\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element offset\n *\n * @param el - Element\n *\n * @return Element offset observable\n */\nexport function watchElementOffset(\n  el: HTMLElement\n): Observable<ElementOffset> {\n  return merge(\n    fromEvent(el, \"scroll\"),\n    fromEvent(window, \"resize\")\n  )\n    .pipe(\n      map(() => getElementOffset(el)),\n      startWith(getElementOffset(el))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  NEVER,\n  Observable,\n  Subject,\n  defer,\n  of\n} from \"rxjs\"\nimport {\n  filter,\n  finalize,\n  map,\n  shareReplay,\n  startWith,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Element offset\n */\nexport interface ElementSize {\n  width: number                        /* Element width */\n  height: number                       /* Element height */\n}\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Resize observer entry subject\n */\nconst entry$ = new Subject<ResizeObserverEntry>()\n\n/**\n * Resize observer observable\n *\n * This observable will create a `ResizeObserver` on the first subscription\n * and will automatically terminate it when there are no more subscribers.\n * It's quite important to centralize observation in a single `ResizeObserver`,\n * as the performance difference can be quite dramatic, as the link shows.\n *\n * @see https://bit.ly/3iIYfEm - Google Groups on performance\n */\nconst observer$ = defer(() => of(\n  new ResizeObserver(entries => {\n    for (const entry of entries)\n      entry$.next(entry)\n  })\n))\n  .pipe(\n    switchMap(resize => NEVER.pipe(startWith(resize))\n      .pipe(\n        finalize(() => resize.disconnect())\n      )\n    ),\n    shareReplay({ bufferSize: 1, refCount: true })\n  )\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve element size\n *\n * @param el - Element\n *\n * @return Element size\n */\nexport function getElementSize(el: HTMLElement): ElementSize {\n  return {\n    width:  el.offsetWidth,\n    height: el.offsetHeight\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch element size\n *\n * This function returns an observable that will subscribe to a single internal\n * instance of `ResizeObserver` upon subscription, and emit resize events until\n * termination. Note that this function should not be called with the same\n * element twice, as the first unsubscription will terminate observation.\n *\n * @param el - Element\n *\n * @return Element size observable\n */\nexport function watchElementSize(\n  el: HTMLElement\n): Observable<ElementSize> {\n  return observer$\n    .pipe(\n      tap(observer => observer.observe(el)),\n      switchMap(observer => entry$\n        .pipe(\n          filter(({ target }) => target === el),\n          finalize(() => observer.unobserve(el)),\n          map(({ contentRect }) => ({\n            width:  contentRect.width,\n            height: contentRect.height\n          }))\n        )\n      ),\n      startWith(getElementSize(el))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { BehaviorSubject, Subject } from \"rxjs\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve location\n *\n * This function will return a `URL` object (and not `Location`) in order to\n * normalize typings across the application. Furthermore, locations need to be\n * tracked without setting them and `Location` is a singleton which represents\n * the current location.\n *\n * @return URL\n */\nexport function getLocation(): URL {\n  return new URL(location.href)\n}\n\n/**\n * Set location\n *\n * @param url - URL to change to\n */\nexport function setLocation(url: URL): void {\n  location.href = url.href\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Check whether a URL is a local link or a file (except `.html`)\n *\n * @param url - URL or HTML anchor element\n * @param ref - Reference URL\n *\n * @return Test result\n */\nexport function isLocalLocation(\n  url: URL | HTMLAnchorElement,\n  ref: URL | Location = location\n): boolean {\n  return url.host === ref.host\n      && /^(?:\\/[\\w-]+)*(?:\\/?|\\.html)$/i.test(url.pathname)\n}\n\n/**\n * Check whether a URL is an anchor link on the current page\n *\n * @param url - URL or HTML anchor element\n * @param ref - Reference URL\n *\n * @return Test result\n */\nexport function isAnchorLocation(\n  url: URL | HTMLAnchorElement,\n  ref: URL | Location = location\n): boolean {\n  return url.pathname === ref.pathname\n      && url.hash.length > 0\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location\n *\n * @return Location subject\n */\nexport function watchLocation(): Subject<URL> {\n  return new BehaviorSubject<URL>(getLocation())\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { filter, map, share, startWith } from \"rxjs/operators\"\n\nimport { createElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve location hash\n *\n * @return Location hash\n */\nexport function getLocationHash(): string {\n  return location.hash.substring(1)\n}\n\n/**\n * Set location hash\n *\n * Setting a new fragment identifier via `location.hash` will have no effect\n * if the value doesn't change. When a new fragment identifier is set, we want\n * the browser to target the respective element at all times, which is why we\n * use this dirty little trick.\n *\n * @param hash - Location hash\n */\nexport function setLocationHash(hash: string): void {\n  const el = createElement(\"a\")\n  el.href = hash\n  el.addEventListener(\"click\", ev => ev.stopPropagation())\n  el.click()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location hash\n *\n * @return Location hash observable\n */\nexport function watchLocationHash(): Observable<string> {\n  return fromEvent<HashChangeEvent>(window, \"hashchange\")\n    .pipe(\n      map(getLocationHash),\n      startWith(getLocationHash()),\n      filter(hash => hash.length > 0),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { shareReplay, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch media query\n *\n * @param query - Media query\n *\n * @return Media observable\n */\nexport function watchMedia(query: string): Observable<boolean> {\n  const media = matchMedia(query)\n  return new Observable<boolean>(subscriber => {\n    media.addListener(ev => subscriber.next(ev.matches))\n  })\n    .pipe(\n      startWith(media.matches),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\nimport { getElementOrThrow } from \"../element\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Toggle\n */\nexport type Toggle =\n  | \"drawer\"                           /* Toggle for drawer */\n  | \"search\"                           /* Toggle for search */\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Toggle map\n */\nconst toggles: Record<Toggle, HTMLInputElement> = {\n  drawer: getElementOrThrow(`[data-md-toggle=drawer]`),\n  search: getElementOrThrow(`[data-md-toggle=search]`)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve the value of a toggle\n *\n * @param name - Toggle\n *\n * @return Toggle value\n */\nexport function getToggle(name: Toggle): boolean {\n  return toggles[name].checked\n}\n\n/**\n * Set toggle\n *\n * Simulating a click event seems to be the most cross-browser compatible way\n * of changing the value while also emitting a `change` event. Before, Material\n * used `CustomEvent` to programmatically change the value of a toggle, but this\n * is a much simpler and cleaner solution which doesn't require a polyfill.\n *\n * @param name - Toggle\n * @param value - Toggle value\n */\nexport function setToggle(name: Toggle, value: boolean): void {\n  if (toggles[name].checked !== value)\n    toggles[name].click()\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch toggle\n *\n * @param name - Toggle\n *\n * @return Toggle value observable\n */\nexport function watchToggle(name: Toggle): Observable<boolean> {\n  const el = toggles[name]\n  return fromEvent(el, \"change\")\n    .pipe(\n      map(() => el.checked),\n      startWith(el.checked)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport offset\n */\nexport interface ViewportOffset {\n  x: number                            /* Horizontal offset */\n  y: number                            /* Vertical offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve viewport offset\n *\n * On iOS Safari, viewport offset can be negative due to overflow scrolling.\n * As this may induce strange behaviors downstream, we'll just limit it to 0.\n *\n * @return Viewport offset\n */\nexport function getViewportOffset(): ViewportOffset {\n  return {\n    x: Math.max(0, pageXOffset),\n    y: Math.max(0, pageYOffset)\n  }\n}\n\n/**\n * Set viewport offset\n *\n * @param offset - Viewport offset\n */\nexport function setViewportOffset(\n  { x, y }: Partial<ViewportOffset>\n): void {\n  window.scrollTo(x || 0, y || 0)\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport offset\n *\n * @return Viewport offset observable\n */\nexport function watchViewportOffset(): Observable<ViewportOffset> {\n  return merge(\n    fromEvent(window, \"scroll\", { passive: true }),\n    fromEvent(window, \"resize\", { passive: true })\n  )\n    .pipe(\n      map(getViewportOffset),\n      startWith(getViewportOffset())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { map, startWith } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport size\n */\nexport interface ViewportSize {\n  width: number                        /* Viewport width */\n  height: number                       /* Viewport height */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Retrieve viewport size\n *\n * @return Viewport size\n */\nexport function getViewportSize(): ViewportSize {\n  return {\n    width:  innerWidth,\n    height: innerHeight\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport size\n *\n * @return Viewport size observable\n */\nexport function watchViewportSize(): Observable<ViewportSize> {\n  return fromEvent(window, \"resize\", { passive: true })\n    .pipe(\n      map(getViewportSize),\n      startWith(getViewportSize())\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, combineLatest } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  shareReplay\n} from \"rxjs/operators\"\n\nimport { Header } from \"components\"\n\nimport {\n  ViewportOffset,\n  watchViewportOffset\n} from \"../offset\"\nimport {\n  ViewportSize,\n  watchViewportSize\n} from \"../size\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Viewport\n */\nexport interface Viewport {\n  offset: ViewportOffset               /* Viewport offset */\n  size: ViewportSize                   /* Viewport size */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch at options\n */\ninterface WatchAtOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch viewport\n *\n * @return Viewport observable\n */\nexport function watchViewport(): Observable<Viewport> {\n  return combineLatest([\n    watchViewportOffset(),\n    watchViewportSize()\n  ])\n    .pipe(\n      map(([offset, size]) => ({ offset, size })),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n\n/**\n * Watch viewport relative to element\n *\n * @param el - Element\n * @param options - Options\n *\n * @return Viewport observable\n */\nexport function watchViewportAt(\n  el: HTMLElement, { header$, viewport$ }: WatchAtOptions\n): Observable<Viewport> {\n  const size$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\")\n    )\n\n  /* Compute element offset */\n  const offset$ = combineLatest([size$, header$])\n    .pipe(\n      map((): ViewportOffset => ({\n        x: el.offsetLeft,\n        y: el.offsetTop\n      }))\n    )\n\n  /* Compute relative viewport, return hot observable */\n  return combineLatest([header$, viewport$, offset$])\n    .pipe(\n      map(([{ height }, { offset, size }, { x, y }]) => ({\n        offset: {\n          x: offset.x - x,\n          y: offset.y - y + height\n        },\n        size\n      }))\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { EMPTY, Observable, of } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  map,\n  scan,\n  shareReplay,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { getElement, replaceElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Component\n */\nexport type Component =\n  | \"announce\"                         /* Announcement bar */\n  | \"container\"                        /* Container */\n  | \"header\"                           /* Header */\n  | \"header-title\"                     /* Header title */\n  | \"main\"                             /* Main area */\n  | \"navigation\"                       /* Navigation */\n  | \"search\"                           /* Search */\n  | \"search-query\"                     /* Search input */\n  | \"search-reset\"                     /* Search reset */\n  | \"search-result\"                    /* Search results */\n  | \"skip\"                             /* Skip link */\n  | \"tabs\"                             /* Tabs */\n  | \"toc\"                              /* Table of contents */\n\n/**\n * Component map\n */\nexport type ComponentMap = {\n  [P in Component]?: HTMLElement\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Component map observable\n */\nlet components$: Observable<ComponentMap>\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up bindings to components with given names\n *\n * This function will maintain bindings to the elements identified by the given\n * names in-between document switches and update the elements in-place.\n *\n * @param names - Component names\n * @param options - Options\n */\nexport function setupComponents(\n  names: Component[], { document$ }: WatchOptions\n): void {\n  components$ = document$\n    .pipe(\n\n      /* Build component map */\n      map(document => names.reduce<ComponentMap>((components, name) => {\n        const el = getElement(`[data-md-component=${name}]`, document)\n        return {\n          ...components,\n          ...typeof el !== \"undefined\" ? { [name]: el } : {}\n        }\n      }, {})),\n\n      /* Re-compute component map on document switch */\n      scan((prev, next) => {\n        for (const name of names) {\n          switch (name) {\n\n            /* Top-level components: update */\n            case \"announce\":\n            case \"header-title\":\n            case \"container\":\n            case \"skip\":\n              if (name in prev && typeof prev[name] !== \"undefined\") {\n                replaceElement(prev[name]!, next[name]!)\n                prev[name] = next[name]\n              }\n              break\n\n            /* All other components: rebind */\n            default:\n              if (typeof next[name] !== \"undefined\")\n                prev[name] = getElement(`[data-md-component=${name}]`)\n              else\n                delete prev[name]\n          }\n        }\n        return prev\n      }),\n\n      /* Convert to hot observable */\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n\n/**\n * Retrieve a component\n *\n * The returned observable will only re-emit if the element changed, i.e. if\n * it was replaced from a document which was switched to.\n *\n * @template T - Element type\n *\n * @param name - Component name\n *\n * @return Component observable\n */\nexport function useComponent<T extends HTMLElement>(\n  name: Component\n): Observable<T> {\n  return components$\n    .pipe(\n      switchMap(components => (\n        typeof components[name] !== \"undefined\"\n          ? of(components[name] as T)\n          : EMPTY\n      )),\n      distinctUntilChanged()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, combineLatest, pipe } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  startWith,\n  switchMap,\n  zipWith\n} from \"rxjs/operators\"\n\nimport {\n  Viewport,\n  getElement,\n  watchViewportAt\n} from \"browser\"\n\nimport { useComponent } from \"../../_\"\nimport {\n  applyHeaderType,\n  watchHeader\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Header type\n */\nexport type HeaderType =\n  | \"site\"                             /* Header shows site title */\n  | \"page\"                             /* Header shows page title */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Header\n */\nexport interface Header {\n  type: HeaderType                     /* Header type */\n  sticky: boolean                      /* Header stickyness */\n  height: number                       /* Header visible height */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount header from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountHeader(\n  { document$, viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Header> {\n  return pipe(\n    switchMap(el => {\n      const header$ = watchHeader(el, { document$ })\n\n      /* Compute whether the header should switch to page header */\n      const type$ = useComponent(\"main\")\n        .pipe(\n          map(main => getElement(\"h1, h2, h3, h4, h5, h6\", main)!),\n          filter(hx => typeof hx !== \"undefined\"),\n          zipWith(useComponent(\"header-title\")),\n          switchMap(([hx, title]) => watchViewportAt(hx, { header$, viewport$ })\n            .pipe(\n              map(({ offset: { y } }) => {\n                return y >= hx.offsetHeight ? \"page\" : \"site\"\n              }),\n              distinctUntilChanged(),\n              applyHeaderType(title)\n            )\n          ),\n          startWith<HeaderType>(\"site\")\n        )\n\n      /* Combine into single observable */\n      return combineLatest([header$, type$])\n        .pipe(\n          map(([header, type]): Header => ({ type, ...header }))\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  of,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  finalize,\n  map,\n  observeOn,\n  shareReplay,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { watchElementSize } from \"browser\"\n\nimport { Header, HeaderType } from \"../_\"\nimport {\n  resetHeaderTitleActive,\n  setHeaderTitleActive\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch header\n *\n * @param el - Header element\n *\n * @return Header observable\n */\nexport function watchHeader(\n  el: HTMLElement, { document$ }: WatchOptions\n): Observable<Omit<Header, \"type\">> {\n  return document$\n    .pipe(\n      map(() => {\n        const styles = getComputedStyle(el)\n        return [\n          \"sticky\",                    /* Modern browsers */\n          \"-webkit-sticky\"             /* Safari */\n        ].includes(styles.position)\n      }),\n      distinctUntilChanged(),\n      switchMap(sticky => {\n        if (sticky) {\n          return watchElementSize(el)\n            .pipe(\n              map(({ height }) => ({\n                sticky: true,\n                height\n              }))\n            )\n        } else {\n          return of({\n            sticky: false,\n            height: 0\n          })\n        }\n      }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply header title type\n *\n * @param el - Header title element\n *\n * @return Operator function\n */\nexport function applyHeaderType(\n  el: HTMLElement\n): MonoTypeOperatorFunction<HeaderType> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(type => {\n      setHeaderTitleActive(el, type === \"page\")\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeaderTitleActive(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set header title active\n *\n * @param el - Header title element\n * @param value - Whether the title is shown\n */\nexport function setHeaderTitleActive(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"active\" : \"\")\n}\n\n/**\n * Reset header title active\n *\n * @param el - Header title element\n */\nexport function resetHeaderTitleActive(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  Observable,\n  OperatorFunction,\n  Subject,\n  noop,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  finalize,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { useComponent } from \"../../_\"\nimport { Header } from \"../../header\"\nimport {\n  applyHeaderShadow,\n  watchMain\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Main area\n */\nexport interface Main {\n  offset: number                       /* Main area top offset */\n  height: number                       /* Main area visible height */\n  active: boolean                      /* Scrolled past top offset */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount main area from source observable\n *\n * The header must be connected to the main area observable outside of the\n * operator function, as the header will persist in-between document switches\n * while the main area is replaced. However, the header observable must be\n * passed to this function, so we connect both via a long-living subject.\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountMain(\n  { header$, viewport$ }: MountOptions\n): OperatorFunction<HTMLElement, Main> {\n  const main$ = new Subject<Main>()\n\n  /* Connect to main area observable via long-living subject */\n  useComponent(\"header\")\n    .pipe(\n      switchMap(header => main$\n        .pipe(\n          distinctUntilKeyChanged(\"active\"),\n          applyHeaderShadow(header)\n        )\n      )\n    )\n      .subscribe(noop)\n\n  /* Return operator */\n  return pipe(\n    switchMap(el => watchMain(el, { header$, viewport$ })),\n    tap(main => main$.next(main)),\n    finalize(() => main$.complete())\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  finalize,\n  map,\n  observeOn,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport, watchElementSize } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../_\"\nimport {\n  resetHeaderShadow,\n  setHeaderShadow\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch main area\n *\n * This function returns an observable that computes the visual parameters of\n * the main area which depends on the viewport vertical offset and height, as\n * well as the height of the header element, if the header is fixed.\n *\n * @param el - Main area element\n * @param options - Options\n *\n * @return Main area observable\n */\nexport function watchMain(\n  el: HTMLElement, { header$, viewport$ }: WatchOptions\n): Observable<Main> {\n\n  /* Compute necessary adjustment for header */\n  const adjust$ = header$\n    .pipe(\n      map(({ height }) => height),\n      distinctUntilChanged()\n    )\n\n  /* Compute the main area's top and bottom borders */\n  const border$ = adjust$\n    .pipe(\n      switchMap(() => watchElementSize(el)\n        .pipe(\n          map(({ height }) => ({\n            top:    el.offsetTop,\n            bottom: el.offsetTop + height\n          })),\n          distinctUntilKeyChanged(\"bottom\")\n        )\n      )\n    )\n\n  /* Compute the main area's offset, visible height and if we scrolled past */\n  return combineLatest([adjust$, border$, viewport$])\n    .pipe(\n      map(([header, { top, bottom }, { offset: { y }, size: { height } }]) => {\n        height = Math.max(0, height\n          - Math.max(0, top    - y,  header)\n          - Math.max(0, height + y - bottom)\n        )\n        return {\n          offset: top - header,\n          height,\n          active: top - header <= y\n        }\n      }),\n      distinctUntilChanged<Main>((a, b) => {\n        return a.offset === b.offset\n            && a.height === b.height\n            && a.active === b.active\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply header shadow\n *\n * @param el - Header element\n *\n * @return Operator function\n */\nexport function applyHeaderShadow(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Main> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ active }) => {\n      setHeaderShadow(el, active)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetHeaderShadow(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set header shadow\n *\n * @param el - Header element\n * @param value - Whether the shadow is shown\n */\nexport function setHeaderShadow(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"shadow\" : \"\")\n}\n\n/**\n * Reset header shadow\n *\n * @param el - Header element\n */\nexport function resetHeaderShadow(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar offset\n *\n * @param el - Sidebar element\n * @param value - Sidebar offset\n */\nexport function setSidebarOffset(\n  el: HTMLElement, value: number\n): void {\n  el.style.top = `${value}px`\n}\n\n/**\n * Reset sidebar offset\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarOffset(\n  el: HTMLElement\n): void {\n  el.style.top = \"\"\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set sidebar height\n *\n * This function doesn't set the height of the actual sidebar, but of its first\n * child – the `.md-sidebar__scrollwrap` element in order to mitigiate jittery\n * sidebars when the footer is scrolled into view. At some point we switched\n * from `absolute` / `fixed` positioning to `sticky` positioning, which greatly\n * reduced jitter in some browsers (respectively Firefox and Safari) when\n * scrolling from the top. However, top-aligned sticky positioning means that\n * the sidebar snaps to the bottom when the end of the container is reached.\n * This is what leads to the mentioned jitter, as the sidebar's height may be\n * updated to slowly.\n *\n * By setting the height of the sidebar to zero (while preserving `padding`),\n * and the height on its first element, this behaviour can be mitigiated. We\n * must assume that the top- and bottom offset (`padding`) are equal, as the\n * `offsetBottom` value is `undefined`.\n *\n * @param el - Sidebar element\n * @param value - Sidebar height\n */\nexport function setSidebarHeight(\n  el: HTMLElement, value: number\n): void {\n  const scrollwrap = el.firstElementChild as HTMLElement\n  scrollwrap.style.height = `${value - 2 * scrollwrap.offsetTop}px`\n}\n\n/**\n * Reset sidebar height\n *\n * @param el - Sidebar element\n */\nexport function resetSidebarHeight(\n  el: HTMLElement\n): void {\n  const scrollwrap = el.firstElementChild as HTMLElement\n  scrollwrap.style.height = \"\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  finalize,\n  map,\n  observeOn,\n  tap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { Header } from \"../../../header\"\nimport { Main } from \"../../../main\"\nimport { Sidebar } from \"../_\"\nimport {\n  resetSidebarHeight,\n  resetSidebarOffset,\n  setSidebarHeight,\n  setSidebarOffset\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/**\n * Apply options\n */\ninterface ApplyOptions {\n  header$: Observable<Header>          /* Header observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch sidebar\n *\n * This function returns an observable that computes the visual parameters of\n * the sidebar which depends on the vertical viewport offset, as well as the\n * height of the main area. When the page is scrolled beyond the header, the\n * sidebar is locked and fills the remaining space.\n *\n * @param el - Sidebar element\n * @param options - Options\n *\n * @return Sidebar observable\n */\nexport function watchSidebar(\n  el: HTMLElement, { main$, viewport$ }: WatchOptions\n): Observable<Sidebar> {\n  const adjust = el.parentElement!.offsetTop\n               - el.parentElement!.parentElement!.offsetTop\n\n  /* Compute the sidebar's available height and if it should be locked */\n  return combineLatest([main$, viewport$])\n    .pipe(\n      map(([{ offset, height }, { offset: { y } }]) => {\n        height = height\n          + Math.min(adjust, Math.max(0, y - offset))\n          - adjust\n        return {\n          height,\n          lock: y >= offset + adjust\n        }\n      }),\n      distinctUntilChanged<Sidebar>((a, b) => {\n        return a.height === b.height\n            && a.lock   === b.lock\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply sidebar\n *\n * @param el - Sidebar element\n * @param options - Options\n *\n * @return Operator function\n */\nexport function applySidebar(\n  el: HTMLElement, { header$ }: ApplyOptions\n): MonoTypeOperatorFunction<Sidebar> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    withLatestFrom(header$),\n    tap(([{ height, lock }, { height: offset }]) => {\n      setSidebarHeight(el, height)\n\n      /* Set offset in locked state depending on header height */\n      if (lock)\n        setSidebarOffset(el, offset)\n      else\n        resetSidebarOffset(el)\n    }),\n\n    /* Re-map to sidebar */\n    map(([sidebar]) => sidebar),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetSidebarOffset(el)\n      resetSidebarHeight(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search transformation function\n *\n * @param value - Query value\n *\n * @return Transformed query value\n */\nexport type SearchTransformFn = (value: string) => string\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Default transformation function\n *\n * 1. Search for terms in quotation marks and prepend a `+` modifier to denote\n *    that the resulting document must contain all terms, converting the query\n *    to an `AND` query (as opposed to the default `OR` behavior). While users\n *    may expect terms enclosed in quotation marks to map to span queries, i.e.\n *    for which order is important, `lunr` doesn't support them, so the best\n *    we can do is to convert the terms to an `AND` query.\n *\n * 2. Replace control characters which are not located at the beginning of the\n *    query or preceded by white space, or are not followed by a non-whitespace\n *    character or are at the end of the query string. Furthermore, filter\n *    unmatched quotation marks.\n *\n * 3. Trim excess whitespace from left and right.\n *\n * @param query - Query value\n *\n * @return Transformed query value\n */\nexport function defaultTransform(query: string): string {\n  return query\n    .split(/\"([^\"]+)\"/g)                            /* => 1 */\n      .map((terms, index) => index & 1\n        ? terms.replace(/^\\b|^(?![^\\x00-\\x7F]|$)|\\s+/g, \" +\")\n        : terms\n      )\n      .join(\"\")\n    .replace(/\"|(?:^|\\s+)[*+\\-:^~]+(?=\\s+|$)/g, \"\") /* => 2 */\n    .trim()                                         /* => 3 */\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n// tslint:disable no-null-keyword\n\nimport { JSX as JSXInternal } from \"preact\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * HTML attributes\n */\ntype Attributes =\n  & JSXInternal.HTMLAttributes\n  & JSXInternal.SVGAttributes\n  & Record<string, any>\n\n/**\n * Child element\n */\ntype Child =\n  | HTMLElement\n  | Text\n  | string\n  | number\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Append a child node to an element\n *\n * @param el - Element\n * @param child - Child node(s)\n */\nfunction appendChild(el: HTMLElement, child: Child | Child[]): void {\n\n  /* Handle primitive types (including raw HTML) */\n  if (typeof child === \"string\" || typeof child === \"number\") {\n    el.innerHTML += child.toString()\n\n  /* Handle nodes */\n  } else if (child instanceof Node) {\n    el.appendChild(child)\n\n  /* Handle nested children */\n  } else if (Array.isArray(child)) {\n    for (const node of child)\n      appendChild(el, node)\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * JSX factory\n *\n * @param tag - HTML tag\n * @param attributes - HTML attributes\n * @param children - Child elements\n *\n * @return Element\n */\nexport function h(\n  tag: string, attributes: Attributes | null, ...children: Child[]\n): HTMLElement {\n  const el = document.createElement(tag)\n\n  /* Set attributes, if any */\n  if (attributes)\n    for (const attr of Object.keys(attributes))\n      if (typeof attributes[attr] !== \"boolean\")\n        el.setAttribute(attr, attributes[attr])\n      else if (attributes[attr])\n        el.setAttribute(attr, \"\")\n\n  /* Append child nodes */\n  for (const child of children)\n    appendChild(el, child)\n\n  /* Return element */\n  return el\n}\n\n/* ----------------------------------------------------------------------------\n * Namespace\n * ------------------------------------------------------------------------- */\n\nexport declare namespace h {\n  namespace JSX {\n    type Element = HTMLElement\n    type IntrinsicElements = JSXInternal.IntrinsicElements\n  }\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { getElementOrThrow } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Translation keys\n */\ntype TranslateKey =\n  | \"clipboard.copy\"                   /* Copy to clipboard */\n  | \"clipboard.copied\"                 /* Copied to clipboard */\n  | \"search.config.lang\"               /* Search language */\n  | \"search.config.pipeline\"           /* Search pipeline */\n  | \"search.config.separator\"          /* Search separator */\n  | \"search.placeholder\"               /* Search */\n  | \"search.result.placeholder\"        /* Type to start searching */\n  | \"search.result.none\"               /* No matching documents */\n  | \"search.result.one\"                /* 1 matching document */\n  | \"search.result.other\"              /* # matching documents */\n  | \"search.result.more.one\"           /* 1 more on this page */\n  | \"search.result.more.other\"         /* # more on this page */\n  | \"search.result.term.missing\"       /* Missing */\n\n/* ----------------------------------------------------------------------------\n * Data\n * ------------------------------------------------------------------------- */\n\n/**\n * Translations\n */\nlet lang: Record<string, string>\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Translate the given key\n *\n * @param key - Key to be translated\n * @param value - Value to be replaced\n *\n * @return Translation\n */\nexport function translate(\n  key: TranslateKey, value?: string | number\n): string {\n  if (typeof lang === \"undefined\") {\n    const el = getElementOrThrow(\"#__lang\")\n    lang = JSON.parse(el.textContent!)\n  }\n  if (typeof lang[key] === \"undefined\") {\n    throw new ReferenceError(`Invalid translation: ${key}`)\n  }\n  return typeof value !== \"undefined\"\n    ? lang[key].replace(\"#\", value.toString())\n    : lang[key]\n}\n\n/**\n * Truncate a string after the given number of characters\n *\n * This is not a very reasonable approach, since the summaries kind of suck.\n * It would be better to create something more intelligent, highlighting the\n * search occurrences and making a better summary out of it, but this note was\n * written three years ago, so who knows if we'll ever fix it.\n *\n * @param value - Value to be truncated\n * @param n - Number of characters\n *\n * @return Truncated value\n */\nexport function truncate(value: string, n: number): string {\n  let i = n\n  if (value.length > i) {\n    while (value[i] !== \" \" && --i > 0); // tslint:disable-line\n    return `${value.substring(0, i)}...`\n  }\n  return value\n}\n\n/**\n * Round a number for display with source facts\n *\n * This is a reverse engineered version of GitHub's weird rounding algorithm\n * for stars, forks and all other numbers. While all numbers below `1,000` are\n * returned as-is, bigger numbers are converted to fixed numbers:\n *\n * - `1,049` => `1k`\n * - `1,050` => `1.1k`\n * - `1,949` => `1.9k`\n * - `1,950` => `2k`\n *\n * @param value - Original value\n *\n * @return Rounded value\n */\nexport function round(value: number): string {\n  if (value > 999) {\n    const digits = +((value - 950) % 1000 > 99)\n    return `${((value + 0.000001) / 1000).toFixed(digits)}k`\n  } else {\n    return value.toString()\n  }\n}\n\n/**\n * Simple hash function\n *\n * @see https://bit.ly/2wsVjJ4 - Original source\n *\n * @param value - Value to be hashed\n *\n * @return Hash as 32bit integer\n */\nexport function hash(value: string): number {\n  let h = 0\n  for (let i = 0, len = value.length; i < len; i++) {\n    h  = ((h << 5) - h) + value.charCodeAt(i)\n    h |= 0 // Convert to 32bit integer\n  }\n  return h\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchIndex, SearchResult } from \"../../_\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search message type\n */\nexport const enum SearchMessageType {\n  SETUP,                               /* Search index setup */\n  READY,                               /* Search index ready */\n  QUERY,                               /* Search query */\n  RESULT                               /* Search results */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * A message containing the data necessary to setup the search index\n */\nexport interface SearchSetupMessage {\n  type: SearchMessageType.SETUP        /* Message type */\n  data: SearchIndex                    /* Message data */\n}\n\n/**\n * A message indicating the search index is ready\n */\nexport interface SearchReadyMessage {\n  type: SearchMessageType.READY        /* Message type */\n}\n\n/**\n * A message containing a search query\n */\nexport interface SearchQueryMessage {\n  type: SearchMessageType.QUERY        /* Message type */\n  data: string                         /* Message data */\n}\n\n/**\n * A message containing results for a search query\n */\nexport interface SearchResultMessage {\n  type: SearchMessageType.RESULT       /* Message type */\n  data: SearchResult[]                 /* Message data */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * A message exchanged with the search worker\n */\nexport type SearchMessage =\n  | SearchSetupMessage\n  | SearchReadyMessage\n  | SearchQueryMessage\n  | SearchResultMessage\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Type guard for search setup messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchSetupMessage(\n  message: SearchMessage\n): message is SearchSetupMessage {\n  return message.type === SearchMessageType.SETUP\n}\n\n/**\n * Type guard for search ready messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchReadyMessage(\n  message: SearchMessage\n): message is SearchReadyMessage {\n  return message.type === SearchMessageType.READY\n}\n\n/**\n * Type guard for search query messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchQueryMessage(\n  message: SearchMessage\n): message is SearchQueryMessage {\n  return message.type === SearchMessageType.QUERY\n}\n\n/**\n * Type guard for search result messages\n *\n * @param message - Search worker message\n *\n * @return Test result\n */\nexport function isSearchResultMessage(\n  message: SearchMessage\n): message is SearchResultMessage {\n  return message.type === SearchMessageType.RESULT\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, asyncScheduler } from \"rxjs\"\nimport {\n  map,\n  observeOn,\n  share,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, watchWorker } from \"browser\"\nimport { translate } from \"utilities\"\n\nimport { SearchIndex, SearchIndexPipeline } from \"../../_\"\nimport {\n  SearchMessage,\n  SearchMessageType,\n  SearchSetupMessage,\n  isSearchResultMessage\n} from \"../message\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  index$: Observable<SearchIndex>      /* Search index observable */\n  base$: Observable<string>            /* Location base observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up search index\n *\n * @param data - Search index\n *\n * @return Search index\n */\nfunction setupSearchIndex(\n  { config, docs, index }: SearchIndex\n): SearchIndex {\n\n  /* Override default language with value from translation */\n  if (config.lang.length === 1 && config.lang[0] === \"en\")\n    config.lang = [translate(\"search.config.lang\")]\n\n  /* Override default separator with value from translation */\n  if (config.separator === \"[\\\\s\\\\-]+\")\n    config.separator = translate(\"search.config.separator\")\n\n  /* Set pipeline from translation */\n  const pipeline = translate(\"search.config.pipeline\")\n    .split(/\\s*,\\s*/)\n    .filter(Boolean) as SearchIndexPipeline\n\n  /* Return search index after defaulting */\n  return { config, docs, index, pipeline }\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up search web worker\n *\n * This function will create a web worker to set up and query the search index\n * which is done using `lunr`. The index must be passed as an observable to\n * enable hacks like _localsearch_ via search index embedding as JSON.\n *\n * @param url - Worker URL\n * @param options - Options\n *\n * @return Worker handler\n */\nexport function setupSearchWorker(\n  url: string, { index$, base$ }: SetupOptions\n): WorkerHandler<SearchMessage> {\n  const worker = new Worker(url)\n\n  /* Create communication channels and resolve relative links */\n  const tx$ = new Subject<SearchMessage>()\n  const rx$ = watchWorker(worker, { tx$ })\n    .pipe(\n      withLatestFrom(base$),\n      map(([message, base]) => {\n        if (isSearchResultMessage(message)) {\n          for (const result of message.data)\n            for (const document of result)\n              document.location = `${base}/${document.location}`\n        }\n        return message\n      }),\n      share()\n    )\n\n  /* Set up search index */\n  index$\n    .pipe(\n      map<SearchIndex, SearchSetupMessage>(data => ({\n        type: SearchMessageType.SETUP,\n        data: setupSearchIndex(data)\n      })),\n      observeOn(asyncScheduler)\n    )\n      .subscribe(tx$.next.bind(tx$))\n\n  /* Return worker handler */\n  return { tx$, rx$ }\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, Subject, fromEvent } from \"rxjs\"\nimport {\n  map,\n  share,\n  switchMapTo,\n  tap,\n  throttle\n} from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Worker message\n */\nexport interface WorkerMessage {\n  type: unknown                        /* Message type */\n  data?: unknown                       /* Message data */\n}\n\n/**\n * Worker handler\n *\n * @template T - Message type\n */\nexport interface WorkerHandler<\n  T extends WorkerMessage\n> {\n  tx$: Subject<T>                      /* Message transmission subject */\n  rx$: Observable<T>                   /* Message receive observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n *\n * @template T - Worker message type\n */\ninterface WatchOptions<T extends WorkerMessage> {\n  tx$: Observable<T>                   /* Message transmission observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch a web worker\n *\n * This function returns an observable that will send all values emitted by the\n * message observable to the web worker. Web worker communication is expected\n * to be bidirectional (request-response) and synchronous. Messages that are\n * emitted during a pending request are throttled, the last one is emitted.\n *\n * @param worker - Web worker\n * @param options - Options\n *\n * @return Worker message observable\n */\nexport function watchWorker<T extends WorkerMessage>(\n  worker: Worker, { tx$ }: WatchOptions<T>\n): Observable<T> {\n\n  /* Intercept messages from worker-like objects */\n  const rx$ = fromEvent<MessageEvent>(worker, \"message\")\n    .pipe<T>(\n      map(({ data }) => data)\n    )\n\n  /* Send and receive messages, return hot observable */\n  return tx$\n    .pipe(\n      throttle(() => rx$, { leading: true, trailing: true }),\n      tap(message => worker.postMessage(message)),\n      switchMapTo(rx$),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  SearchDocument,\n  SearchMetadata,\n  SearchResult\n} from \"integrations/search\"\nimport { h, translate, truncate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Render flag\n */\nconst enum Flag {\n  TEASER = 1,                          /* Render teaser */\n  PARENT = 2                           /* Render as parent */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper function\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a search document\n *\n * @param section - Search document\n * @param flag - Render flags\n *\n * @return Element\n */\nfunction renderSearchDocument(\n  document: SearchDocument & SearchMetadata, flag: Flag\n) {\n  const parent = flag & Flag.PARENT\n  const teaser = flag & Flag.TEASER\n\n  /* Render missing query terms */\n  const missing = Object.keys(document.terms)\n    .filter(key => !document.terms[key])\n    .map(key => [<del>{key}</del>, \" \"])\n    .flat()\n    .slice(0, -1)\n\n  /* Render article or section, depending on flags */\n  const url = document.location\n  return (\n    <a href={url} class=\"md-search-result__link\" tabIndex={-1}>\n      <article\n        class={[\"md-search-result__article\", ...parent\n          ? [\"md-search-result__article--document\"]\n          : []\n        ].join(\" \")}\n        data-md-score={document.score.toFixed(2)}\n      >\n        {parent > 0 && <div class=\"md-search-result__icon md-icon\"></div>}\n        <h1 class=\"md-search-result__title\">{document.title}</h1>\n        {teaser > 0 && document.text.length > 0 &&\n          <p class=\"md-search-result__teaser\">\n            {truncate(document.text, 320)}\n          </p>\n        }\n        {teaser > 0 && missing.length > 0 &&\n          <p class=\"md-search-result__terms\">\n            {translate(\"search.result.term.missing\")}: {...missing}\n          </p>\n        }\n      </article>\n    </a>\n  )\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a search result\n *\n * @param result - Search result\n * @param threshold - Score threshold\n *\n * @return Element\n */\nexport function renderSearchResult(\n  result: SearchResult, threshold: number = Infinity\n) {\n  const docs = [...result]\n\n  /* Find and extract parent article */\n  const parent = docs.findIndex(doc => !doc.location.includes(\"#\"))\n  const [article] = docs.splice(parent, 1)\n\n  /* Determine last index above threshold */\n  let index = docs.findIndex(doc => doc.score < threshold)\n  if (index === -1)\n    index = docs.length\n\n  /* Partition sections */\n  const best = docs.slice(0, index)\n  const more = docs.slice(index)\n\n  /* Render children */\n  const children = [\n    renderSearchDocument(article, Flag.PARENT | +(!parent && index === 0)),\n    ...best.map(section => renderSearchDocument(section, Flag.TEASER)),\n    ...more.length ? [\n      <details class=\"md-search-result__more\">\n        <summary tabIndex={-1}>\n          {more.length > 0 && more.length === 1\n            ? translate(\"search.result.more.one\")\n            : translate(\"search.result.more.other\", more.length)\n          }\n        </summary>\n        {...more.map(section => renderSearchDocument(section, Flag.TEASER))}\n      </details>\n    ] : []\n  ]\n\n  /* Render search result */\n  return (\n    <li class=\"md-search-result__item\">\n      {children}\n    </li>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SourceFacts } from \"patches/source\"\nimport { h } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render source facts\n *\n * @param facts - Source facts\n *\n * @return Element\n */\nexport function renderSource(\n  facts: SourceFacts\n) {\n  return (\n    <ul class=\"md-source__facts\">\n      {facts.map(fact => (\n        <li class=\"md-source__fact\">{fact}</li>\n      ))}\n    </ul>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport * as ClipboardJS from \"clipboard\"\nimport { NEVER, Observable, Subject } from \"rxjs\"\nimport { mapTo, share, tap } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\nimport { renderClipboardButton } from \"templates\"\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  document$: Observable<Document>      /* Document observable */\n  dialog$: Subject<string>             /* Dialog subject */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up clipboard\n *\n * This function implements the Clipboard.js integration and injects a button\n * into all code blocks when the document changes.\n *\n * @param options - Options\n *\n * @return Clipboard observable\n */\nexport function setupClipboard(\n  { document$, dialog$ }: SetupOptions\n): Observable<ClipboardJS.Event> {\n  if (!ClipboardJS.isSupported())\n    return NEVER\n\n  /* Inject 'copy-to-clipboard' buttons */\n  document$.subscribe(() => {\n    const blocks = getElements(\"pre > code\")\n    blocks.forEach((block, index) => {\n      const parent = block.parentElement!\n      parent.id = `__code_${index}`\n      parent.insertBefore(\n        renderClipboardButton(parent.id),\n        block\n      )\n    })\n  })\n\n  /* Initialize clipboard */\n  const clipboard$ = new Observable<ClipboardJS.Event>(subscriber => {\n    new ClipboardJS(\".md-clipboard\").on(\"success\", ev => subscriber.next(ev))\n  })\n    .pipe(\n      share()\n    )\n\n  /* Display notification for clipboard event */\n  clipboard$\n    .pipe(\n      tap(ev => ev.clearSelection()),\n      mapTo(translate(\"clipboard.copied\"))\n    )\n      .subscribe(dialog$)\n\n  /* Return clipboard */\n  return clipboard$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { h, translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a 'copy-to-clipboard' button\n *\n * @param id - Unique identifier\n *\n * @return Element\n */\nexport function renderClipboardButton(id: string) {\n  return (\n    <button\n      class=\"md-clipboard md-icon\"\n      title={translate(\"clipboard.copy\")}\n      data-clipboard-target={`#${id} > code`}\n    ></button>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable, Subject, from, fromEvent, merge, of } from \"rxjs\"\nimport {\n  bufferCount,\n  catchError,\n  debounceTime,\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  filter,\n  map,\n  sample,\n  share,\n  skip,\n  switchMap\n} from \"rxjs/operators\"\n\nimport {\n  Viewport,\n  ViewportOffset,\n  getElement,\n  isAnchorLocation,\n  isLocalLocation,\n  replaceElement,\n  setLocation,\n  setLocationHash,\n  setToggle,\n  setViewportOffset\n} from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * History state\n */\ninterface State {\n  url: URL                             /* State URL */\n  offset?: ViewportOffset              /* State viewport offset */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  document$: Subject<Document>         /* Document subject */\n  location$: Subject<URL>              /* Location subject */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up instant loading\n *\n * When fetching, theoretically, we could use `responseType: \"document\"`, but\n * since all MkDocs links are relative, we need to make sure that the current\n * location matches the document we just loaded. Otherwise any relative links\n * in the document could use the old location.\n *\n * This is the reason why we need to synchronize history events and the process\n * of fetching the document for navigation changes (except `popstate` events):\n *\n * 1. Fetch document via `XMLHTTPRequest`\n * 2. Set new location via `history.pushState`\n * 3. Parse and emit fetched document\n *\n * For `popstate` events, we must not use `history.pushState`, or the forward\n * history will be irreversibly overwritten. In case the request fails, the\n * location change is dispatched regularly.\n *\n * @param options - Options\n */\nexport function setupInstantLoading(\n  urls: string[], { document$, viewport$, location$ }: SetupOptions\n): void {\n\n  /* Disable automatic scroll restoration */\n  if (\"scrollRestoration\" in history)\n    history.scrollRestoration = \"manual\"\n\n  /* Hack: ensure that reloads restore viewport offset */\n  fromEvent(window, \"beforeunload\")\n    .subscribe(() => {\n      history.scrollRestoration = \"auto\"\n    })\n\n  /* Hack: ensure absolute favicon link to omit 404s on document switch */\n  const favicon = getElement<HTMLLinkElement>(`link[rel=\"shortcut icon\"]`)\n  if (typeof favicon !== \"undefined\")\n    favicon.href = favicon.href // tslint:disable-line no-self-assignment\n\n  /* Intercept link clicks and convert to state change */\n  const state$ = fromEvent<MouseEvent>(document.body, \"click\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      switchMap(ev => {\n        if (ev.target instanceof HTMLElement) {\n          const el = ev.target.closest(\"a\")\n          if (\n            el && !el.target &&\n            isLocalLocation(el) &&\n            urls.includes(el.href)\n          ) {\n            if (!isAnchorLocation(el))\n              ev.preventDefault()\n            return of(el)\n          }\n        }\n        return NEVER\n      }),\n      map(el => ({ url: new URL(el.href) })),\n      share<State>()\n    )\n\n  /* Always close search on link click */\n  state$.subscribe(() => {\n    setToggle(\"search\", false)\n  })\n\n  /* Filter state changes to dispatch */\n  const push$ = state$\n    .pipe(\n      filter(({ url }) => !isAnchorLocation(url)),\n      share()\n    )\n\n  /* Intercept popstate events (history back and forward) */\n  const pop$ = fromEvent<PopStateEvent>(window, \"popstate\")\n    .pipe(\n      filter(ev => ev.state !== null),\n      map(ev => ({\n        url: new URL(location.href),\n        offset: ev.state\n      })),\n      share<State>()\n    )\n\n  /* Emit location change */\n  merge(push$, pop$)\n    .pipe(\n      distinctUntilChanged((prev, next) => prev.url.href === next.url.href),\n      map(({ url }) => url)\n    )\n      .subscribe(location$)\n\n  /* Fetch document on location change */\n  const ajax$ = location$\n    .pipe(\n      distinctUntilKeyChanged(\"pathname\"),\n      skip(1),\n      switchMap(url => from(fetch(url.href, {\n        credentials: \"same-origin\"\n      }).then(res => res.text()))\n        .pipe(\n          catchError(() => {\n            setLocation(url)\n            return NEVER\n          })\n        )\n      ),\n      share()\n    )\n\n  /* Set new location as soon as the document was fetched */\n  push$\n    .pipe(\n      sample(ajax$)\n    )\n      .subscribe(({ url }) => {\n        history.pushState({}, \"\", url.toString())\n      })\n\n  /* Parse and emit document */\n  const dom = new DOMParser()\n  ajax$\n    .pipe(\n      map(response => dom.parseFromString(response, \"text/html\"))\n    )\n      .subscribe(document$)\n\n  /* Intercept instant loading */\n  const instant$ = merge(push$, pop$)\n    .pipe(\n      sample(document$)\n    )\n\n  // TODO: this must be combined with search scroll restoration on mobile\n  instant$.subscribe(({ url, offset }) => {\n    if (url.hash && !offset) {\n      setLocationHash(url.hash)\n    } else {\n      setViewportOffset(offset || { y: 0 })\n    }\n  })\n\n  /* Replace document metadata */\n  document$\n    .pipe(\n      skip(1) // Skip initial\n    )\n      .subscribe(({ title, head }) => {\n        document.title = title\n\n        /* Replace meta tags */\n        for (const selector of [\n          `link[rel=\"canonical\"]`,\n          `meta[name=\"author\"]`,\n          `meta[name=\"description\"]`\n        ]) {\n          const next = getElement(selector, head)\n          const prev = getElement(selector, document.head)\n          if (\n            typeof next !== \"undefined\" &&\n            typeof prev !== \"undefined\"\n          ) {\n            replaceElement(prev, next)\n          }\n        }\n\n        /* Finished, dispatch document switch event */\n        document.dispatchEvent(new CustomEvent(\"DOMContentSwitch\"))\n      })\n\n  /* Debounce update of viewport offset */\n  viewport$\n    .pipe(\n      debounceTime(250),\n      distinctUntilKeyChanged(\"offset\")\n    )\n      .subscribe(({ offset }) => {\n        history.replaceState(offset, \"\")\n      })\n\n  /* Set viewport offset from history */\n  merge(state$, pop$)\n    .pipe(\n      bufferCount(2, 1),\n      filter(([prev, next]) => {\n        return prev.url.pathname === next.url.pathname\n            && !isAnchorLocation(next.url)\n      }),\n      map(([, state]) => state)\n    )\n      .subscribe(({ offset }) => {\n        setViewportOffset(offset || { y: 0 })\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport {\n  filter,\n  map,\n  share,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  Key,\n  getActiveElement,\n  getElement,\n  getElements,\n  getToggle,\n  isSusceptibleToKeyboard,\n  setElementFocus,\n  setElementSelection,\n  setToggle,\n  watchKeyboard\n} from \"browser\"\nimport { useComponent } from \"components\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Keyboard mode\n */\nexport type KeyboardMode =\n  | \"global\"                           /* Global */\n  | \"search\"                           /* Search is open */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Keyboard\n */\nexport interface Keyboard extends Key {\n  mode: KeyboardMode                   /* Keyboard mode */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up keyboard\n *\n * This function will set up the keyboard handlers and ensure that keys are\n * correctly propagated. Currently there are two modes:\n *\n * - `global`: This mode is active when the search is closed. It is intended\n *   to assign hotkeys to specific functions of the site. Currently the search,\n *   previous and next page can be triggered.\n *\n * - `search`: This mode is active when the search is open. It maps certain\n *   navigational keys to offer search results that can be entirely navigated\n *   through keyboard input.\n *\n * The keyboard observable is returned and can be used to monitor the keyboard\n * in order toassign further hotkeys to custom functions.\n *\n * @return Keyboard observable\n */\nexport function setupKeyboard(): Observable<Keyboard> {\n  const keyboard$ = watchKeyboard()\n    .pipe(\n      map<Key, Keyboard>(key => ({\n        mode: getToggle(\"search\") ? \"search\" : \"global\",\n        ...key\n      })),\n      filter(({ mode }) => {\n        if (mode === \"global\") {\n          const active = getActiveElement()\n          if (typeof active !== \"undefined\")\n            return !isSusceptibleToKeyboard(active)\n        }\n        return true\n      }),\n      share()\n    )\n\n  /* Set up search keyboard handlers */\n  keyboard$\n    .pipe(\n      filter(({ mode }) => mode === \"search\"),\n      withLatestFrom(\n        useComponent(\"search-query\"),\n        useComponent(\"search-result\")\n      )\n    )\n      .subscribe(([key, query, result]) => {\n        const active = getActiveElement()\n        switch (key.type) {\n\n          /* Enter: prevent form submission */\n          case \"Enter\":\n            if (active === query)\n              key.claim()\n            break\n\n          /* Escape or Tab: close search */\n          case \"Escape\":\n          case \"Tab\":\n            setToggle(\"search\", false)\n            setElementFocus(query, false)\n            break\n\n          /* Vertical arrows: select previous or next search result */\n          case \"ArrowUp\":\n          case \"ArrowDown\":\n            if (typeof active === \"undefined\") {\n              setElementFocus(query)\n            } else {\n              const els = [query, ...getElements(\n                \":not(details) > [href], summary, details[open] [href]\",\n                result\n              )]\n              const i = Math.max(0, (\n                Math.max(0, els.indexOf(active)) + els.length + (\n                  key.type === \"ArrowUp\" ? -1 : +1\n                )\n              ) % els.length)\n              setElementFocus(els[i])\n            }\n\n            /* Prevent scrolling of page */\n            key.claim()\n            break\n\n          /* All other keys: hand to search query */\n          default:\n            if (query !== getActiveElement())\n              setElementFocus(query)\n        }\n      })\n\n  /* Set up global keyboard handlers */\n  keyboard$\n    .pipe(\n      filter(({ mode }) => mode === \"global\"),\n      withLatestFrom(useComponent(\"search-query\"))\n    )\n      .subscribe(([key, query]) => {\n        switch (key.type) {\n\n          /* Open search and select query */\n          case \"f\":\n          case \"s\":\n          case \"/\":\n            setElementFocus(query)\n            setElementSelection(query)\n            key.claim()\n            break\n\n          /* Go to previous page */\n          case \"p\":\n          case \",\":\n            const prev = getElement(\"[href][rel=prev]\")\n            if (typeof prev !== \"undefined\")\n              prev.click()\n            break\n\n          /* Go to next page */\n          case \"n\":\n          case \".\":\n            const next = getElement(\"[href][rel=next]\")\n            if (typeof next !== \"undefined\")\n              next.click()\n            break\n        }\n      })\n\n  /* Return keyboard */\n  return keyboard$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { filter, map, share } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Key\n */\nexport interface Key {\n  type: string                         /* Key type */\n  claim(): void                        /* Key claim */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Check whether an element may receive keyboard input\n *\n * @param el - Element\n *\n * @return Test result\n */\nexport function isSusceptibleToKeyboard(el: HTMLElement): boolean {\n  switch (el.tagName) {\n\n    /* Form elements */\n    case \"INPUT\":\n    case \"SELECT\":\n    case \"TEXTAREA\":\n      return true\n\n    /* Everything else */\n    default:\n      return el.isContentEditable\n  }\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch keyboard\n *\n * @return Keyboard observable\n */\nexport function watchKeyboard(): Observable<Key> {\n  return fromEvent<KeyboardEvent>(window, \"keydown\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      map(ev => ({\n        type: ev.key,\n        claim() {\n          ev.preventDefault()\n          ev.stopPropagation()\n        }\n      })),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set element text selection\n *\n * @param el - Element\n */\nexport function setElementSelection(\n  el: HTMLElement\n): void {\n  if (el instanceof HTMLInputElement)\n    el.select()\n  else\n    throw new Error(\"Not implemented\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set search query placeholder\n *\n * @param el - Search query element\n * @param value - Placeholder\n */\nexport function setSearchQueryPlaceholder(\n  el: HTMLInputElement, value: string\n): void {\n  el.placeholder = value\n}\n\n/**\n * Reset search query placeholder\n *\n * @param el - Search query element\n */\nexport function resetSearchQueryPlaceholder(\n  el: HTMLInputElement\n): void {\n  el.placeholder = translate(\"search.placeholder\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  combineLatest,\n  fromEvent,\n  merge,\n  pipe\n} from \"rxjs\"\nimport {\n  delay,\n  distinctUntilChanged,\n  finalize,\n  map,\n  startWith,\n  tap\n} from \"rxjs/operators\"\n\nimport { watchElementFocus } from \"browser\"\nimport { SearchTransformFn, defaultTransform } from \"integrations\"\n\nimport { SearchQuery } from \"../_\"\nimport {\n  resetSearchQueryPlaceholder,\n  setSearchQueryPlaceholder\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  transform?: SearchTransformFn        /* Transformation function */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch search query\n *\n * Note that the focus event which triggers re-reading the current query value\n * is delayed by `1ms` so the input's empty state is allowed to propagate.\n *\n * @param el - Search query element\n * @param options - Options\n *\n * @return Search query observable\n */\nexport function watchSearchQuery(\n  el: HTMLInputElement, { transform }: WatchOptions = {}\n): Observable<SearchQuery> {\n  const fn = transform || defaultTransform\n\n  /* Intercept keyboard events */\n  const value$ = merge(\n    fromEvent(el, \"keyup\"),\n    fromEvent(el, \"focus\").pipe(delay(1))\n  )\n    .pipe(\n      map(() => fn(el.value)),\n      startWith(fn(el.value)),\n      distinctUntilChanged()\n    )\n\n  /* Intercept focus events */\n  const focus$ = watchElementFocus(el)\n\n  /* Combine into single observable */\n  return combineLatest([value$, focus$])\n    .pipe(\n      map(([value, focus]) => ({ value, focus }))\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply search query\n *\n * @param el - Search query element\n *\n * @return Operator function\n */\nexport function applySearchQuery(\n  el: HTMLInputElement\n): MonoTypeOperatorFunction<SearchQuery> {\n  return pipe(\n\n    /* Hide placeholder when search is focused */\n    tap(({ focus }) => {\n      if (focus) {\n        setSearchQueryPlaceholder(el, \"\")\n      } else {\n        resetSearchQueryPlaceholder(el)\n      }\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetSearchQueryPlaceholder(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { OperatorFunction, pipe } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, setToggle } from \"browser\"\nimport {\n  SearchMessage,\n  SearchMessageType,\n  SearchQueryMessage,\n  SearchTransformFn\n} from \"integrations\"\n\nimport {\n  applySearchQuery,\n  watchSearchQuery\n} from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search query\n */\nexport interface SearchQuery {\n  value: string                        /* Query value */\n  focus: boolean                       /* Query focus */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  transform?: SearchTransformFn        /* Transformation function */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search query from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearchQuery(\n  { tx$ }: WorkerHandler<SearchMessage>, options: MountOptions = {}\n): OperatorFunction<HTMLInputElement, SearchQuery> {\n  return pipe(\n    switchMap(el => {\n      const query$ = watchSearchQuery(el, options)\n\n      /* Subscribe worker to search query */\n      query$\n        .pipe(\n          distinctUntilKeyChanged(\"value\"),\n          map(({ value }): SearchQueryMessage => ({\n            type: SearchMessageType.QUERY,\n            data: value\n          }))\n        )\n          .subscribe(tx$.next.bind(tx$))\n\n      /* Toggle search on focus */\n      query$\n        .pipe(\n          distinctUntilKeyChanged(\"focus\")\n        )\n          .subscribe(({ focus }) => {\n            if (focus)\n              setToggle(\"search\", focus)\n          })\n\n      /* Return search query */\n      return query$\n        .pipe(\n          applySearchQuery(el)\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { OperatorFunction, pipe } from \"rxjs\"\nimport {\n  mapTo,\n  startWith,\n  switchMap,\n  switchMapTo,\n  tap\n} from \"rxjs/operators\"\n\nimport { setElementFocus } from \"browser\"\n\nimport { useComponent } from \"../../../_\"\nimport { watchSearchReset } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search reset from source observable\n *\n * @return Operator function\n */\nexport function mountSearchReset(): OperatorFunction<HTMLElement, void> {\n  return pipe(\n    switchMap(el => watchSearchReset(el)\n      .pipe(\n        switchMapTo(useComponent(\"search-query\")),\n        tap(setElementFocus),\n        mapTo(undefined)\n      )\n    ),\n    startWith(undefined)\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent } from \"rxjs\"\nimport { mapTo } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch search reset\n *\n * @param el - Search reset element\n *\n * @return Search reset observable\n */\nexport function watchSearchReset(\n  el: HTMLElement\n): Observable<void> {\n  return fromEvent(el, \"click\")\n    .pipe(\n      mapTo(undefined)\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { translate } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set number of search results\n *\n * @param el - Search result metadata element\n * @param value - Number of results\n */\nexport function setSearchResultMeta(\n  el: HTMLElement, value: number\n): void {\n  switch (value) {\n\n    /* No results */\n    case 0:\n      el.textContent = translate(\"search.result.none\")\n      break\n\n    /* One result */\n    case 1:\n      el.textContent = translate(\"search.result.one\")\n      break\n\n    /* Multiple result */\n    default:\n      el.textContent = translate(\"search.result.other\", value)\n  }\n}\n\n/**\n * Reset number of search results\n *\n * @param el - Search result metadata element\n */\nexport function resetSearchResultMeta(\n  el: HTMLElement\n): void {\n  el.textContent = translate(\"search.result.placeholder\")\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Add an element to the search result list\n *\n * @param el - Search result list element\n * @param child - Search result element\n */\nexport function addToSearchResultList(\n  el: HTMLElement, child: Element\n): void {\n  el.appendChild(child)\n}\n\n/**\n * Reset search result list\n *\n * @param el - Search result list element\n */\nexport function resetSearchResultList(\n  el: HTMLElement\n): void {\n  el.innerHTML = \"\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport {\n  finalize,\n  map,\n  mapTo,\n  observeOn,\n  scan,\n  switchMap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport { getElementOrThrow } from \"browser\"\nimport { SearchResult } from \"integrations/search\"\nimport { renderSearchResult } from \"templates\"\n\nimport { SearchQuery } from \"../../query\"\nimport {\n  addToSearchResultList,\n  resetSearchResultList,\n  resetSearchResultMeta,\n  setSearchResultMeta\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply options\n */\ninterface ApplyOptions {\n  query$: Observable<SearchQuery>     /* Search query observable */\n  ready$: Observable<boolean>         /* Search ready observable */\n  fetch$: Observable<boolean>         /* Result fetch observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply search results\n *\n * This function will perform a lazy rendering of the search results, depending\n * on the vertical offset of the search result container. When the scroll offset\n * reaches the bottom of the element, more results are fetched and rendered.\n *\n * @param el - Search result element\n * @param options - Options\n *\n * @return Operator function\n */\nexport function applySearchResult(\n  el: HTMLElement, { query$, ready$, fetch$ }: ApplyOptions\n): MonoTypeOperatorFunction<SearchResult[]> {\n  const list = getElementOrThrow(\".md-search-result__list\", el)\n  const meta = getElementOrThrow(\".md-search-result__meta\", el)\n  return pipe(\n\n    /* Apply search result metadata */\n    withLatestFrom(query$, ready$),\n    map(([result, query]) => {\n      if (query.value) {\n        setSearchResultMeta(meta, result.length)\n      } else {\n        resetSearchResultMeta(meta)\n      }\n      return result\n    }),\n\n    /* Apply search result list */\n    switchMap(result => {\n      const thresholds = [...result.map(([best]) => best.score), 0]\n      return fetch$\n        .pipe(\n\n          /* Defer repaint to next animation frame */\n          observeOn(animationFrameScheduler),\n          scan(index => {\n            const container = el.parentElement!\n            while (index < result.length) {\n              addToSearchResultList(list, renderSearchResult(\n                result[index++], thresholds[index]\n              ))\n              if (container.scrollHeight - container.offsetHeight > 16)\n                break\n            }\n            return index\n          }, 0),\n\n          /* Re-map to search result */\n          mapTo(result),\n\n          /* Reset on complete or error */\n          finalize(() => {\n            resetSearchResultList(list)\n          })\n        )\n      }\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, pipe } from \"rxjs\"\nimport {\n  distinctUntilChanged,\n  filter,\n  map,\n  mapTo,\n  startWith,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { WorkerHandler, watchElementOffset } from \"browser\"\nimport {\n  SearchMessage,\n  SearchResult,\n  isSearchReadyMessage,\n  isSearchResultMessage\n} from \"integrations\"\n\nimport { SearchQuery } from \"../../query\"\nimport { applySearchResult } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  query$: Observable<SearchQuery>      /* Search query observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search result from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearchResult(\n  { rx$ }: WorkerHandler<SearchMessage>, { query$ }: MountOptions\n): OperatorFunction<HTMLElement, SearchResult[]> {\n  return pipe(\n    switchMap(el => {\n      const container = el.parentElement!\n\n      /* Compute if search is ready */\n      const ready$ = rx$\n        .pipe(\n          filter(isSearchReadyMessage),\n          mapTo(true)\n        )\n\n      /* Compute whether there are more search results to fetch */\n      const fetch$ = watchElementOffset(container)\n        .pipe(\n          map(({ y }) => {\n            return y >= container.scrollHeight - container.offsetHeight - 16\n          }),\n          distinctUntilChanged(),\n          filter(Boolean)\n        )\n\n      /* Apply search results */\n      return rx$\n        .pipe(\n          filter(isSearchResultMessage),\n          map(({ data }) => data),\n          applySearchResult(el, { query$, ready$, fetch$ }),\n          startWith([])\n        )\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, of, pipe } from \"rxjs\"\nimport {\n  distinctUntilKeyChanged,\n  map,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { Viewport, watchViewportAt } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { applyTabs } from \"../react\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Tabs\n */\nexport interface Tabs {\n  hidden: boolean                      /* Whether the tabs are hidden */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  screen$: Observable<boolean>         /* Media screen observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount tabs from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountTabs(\n  { header$, viewport$, screen$ }: MountOptions\n): OperatorFunction<HTMLElement, Tabs> {\n  return pipe(\n    switchMap(el => screen$\n      .pipe(\n        switchMap(screen => {\n\n          /* [screen +]: Mount tabs above screen breakpoint */\n          if (screen) {\n            return watchViewportAt(el, { header$, viewport$ })\n              .pipe(\n                map(({ offset: { y } }) => ({ hidden: y >= 10 })),\n                distinctUntilKeyChanged(\"hidden\"),\n                applyTabs(el)\n              )\n\n          /* [screen -]: Unmount tabs below screen breakpoint */\n          } else {\n            return of({ hidden: true })\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  animationFrameScheduler,\n  pipe\n} from \"rxjs\"\nimport { finalize, observeOn, tap } from \"rxjs/operators\"\n\nimport { Tabs } from \"../_\"\nimport {\n  resetTabsHidden,\n  setTabsHidden\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Apply tabs\n *\n * @param el - Tabs element\n *\n * @return Operator function\n */\nexport function applyTabs(\n  el: HTMLElement\n): MonoTypeOperatorFunction<Tabs> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ hidden }) => {\n      setTabsHidden(el, hidden)\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      resetTabsHidden(el)\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set tabs hidden\n *\n * @param el - Tabs element\n * @param value - Whether the element is hidden\n */\nexport function setTabsHidden(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"hidden\" : \"\")\n}\n\n/**\n * Reset tabs hidden\n *\n * @param el - Tabs element\n */\nexport function resetTabsHidden(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set anchor blur\n *\n * @param el - Anchor element\n * @param value - Whether the anchor is blurred\n */\nexport function setAnchorBlur(\n  el: HTMLElement, value: boolean\n): void {\n  el.setAttribute(\"data-md-state\", value ? \"blur\" : \"\")\n}\n\n/**\n * Reset anchor blur\n *\n * @param el - Anchor element\n */\nexport function resetAnchorBlur(\n  el: HTMLElement\n): void {\n  el.removeAttribute(\"data-md-state\")\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Set anchor active\n *\n * @param el - Anchor element\n * @param value - Whether the anchor is active\n */\nexport function setAnchorActive(\n  el: HTMLElement, value: boolean\n): void {\n  el.classList.toggle(\"md-nav__link--active\", value)\n}\n\n/**\n * Reset anchor active\n *\n * @param el - Anchor element\n */\nexport function resetAnchorActive(\n  el: HTMLElement\n): void {\n  el.classList.remove(\"md-nav__link--active\")\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  Observable,\n  OperatorFunction,\n  combineLatest,\n  of,\n  pipe\n} from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport, getElements } from \"browser\"\n\nimport { Header } from \"../../header\"\nimport { Main } from \"../../main\"\nimport {\n  Sidebar,\n  applySidebar,\n  watchSidebar\n} from \"../../shared\"\nimport {\n  AnchorList,\n  applyAnchorList,\n  watchAnchorList\n} from \"../anchor\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Table of contents for [tablet -]\n */\ninterface TableOfContentsBelowTablet {} // tslint:disable-line\n\n/**\n * Table of contents for [tablet +]\n */\ninterface TableOfContentsAboveTablet {\n  sidebar: Sidebar                     /* Sidebar */\n  anchors: AnchorList                  /* Anchor list */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Table of contents\n */\nexport type TableOfContents =\n  | TableOfContentsBelowTablet\n  | TableOfContentsAboveTablet\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  tablet$: Observable<boolean>         /* Tablet media observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount table of contents from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountTableOfContents(\n  { header$, main$, viewport$, tablet$ }: MountOptions\n): OperatorFunction<HTMLElement, TableOfContents> {\n  return pipe(\n    switchMap(el => tablet$\n      .pipe(\n        switchMap(tablet => {\n\n          /* [tablet +]: Mount table of contents in sidebar */\n          if (tablet) {\n            const els = getElements<HTMLAnchorElement>(\".md-nav__link\", el)\n\n            /* Watch and apply sidebar */\n            const sidebar$ = watchSidebar(el, { main$, viewport$ })\n              .pipe(\n                applySidebar(el, { header$ })\n              )\n\n            /* Watch and apply anchor list (scroll spy) */\n            const anchors$ = watchAnchorList(els, { header$, viewport$ })\n              .pipe(\n                applyAnchorList(els)\n              )\n\n            /* Combine into single hot observable */\n            return combineLatest([sidebar$, anchors$])\n              .pipe(\n                map(([sidebar, anchors]) => ({ sidebar, anchors }))\n              )\n\n          /* [tablet -]: Unmount table of contents */\n          } else {\n            return of({})\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport {\n  MonoTypeOperatorFunction,\n  Observable,\n  animationFrameScheduler,\n  combineLatest,\n  pipe\n} from \"rxjs\"\nimport {\n  bufferCount,\n  distinctUntilChanged,\n  distinctUntilKeyChanged,\n  finalize,\n  map,\n  observeOn,\n  scan,\n  startWith,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { Viewport, getElement, watchElementSize } from \"browser\"\n\nimport { Header } from \"../../../header\"\nimport { AnchorList } from \"../_\"\nimport {\n  resetAnchorActive,\n  resetAnchorBlur,\n  setAnchorActive,\n  setAnchorBlur\n} from \"../set\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  header$: Observable<Header>          /* Header observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch anchor list\n *\n * This is effectively a scroll-spy implementation which will account for the\n * fixed header and automatically re-calculate anchor offsets when the viewport\n * is resized. The returned observable will only emit if the anchor list needs\n * to be repainted.\n *\n * This implementation tracks an anchor element's entire path starting from its\n * level up to the top-most anchor element, e.g. `[h3, h2, h1]`. Although the\n * Material theme currently doesn't make use of this information, it enables\n * the styling of the entire hierarchy through customization.\n *\n * Note that the current anchor is the last item of the `prev` anchor list.\n *\n * @param els - Anchor elements\n * @param options - Options\n *\n * @return Anchor list observable\n */\nexport function watchAnchorList(\n  els: HTMLAnchorElement[], { header$, viewport$ }: WatchOptions\n): Observable<AnchorList> {\n  const table = new Map<HTMLAnchorElement, HTMLElement>()\n  for (const el of els) {\n    const id = decodeURIComponent(el.hash.substring(1))\n    const target = getElement(`[id=\"${id}\"]`)\n    if (typeof target !== \"undefined\")\n      table.set(el, target)\n  }\n\n  /* Compute necessary adjustment for header */\n  const adjust$ = header$\n    .pipe(\n      map(header => 24 + header.height)\n    )\n\n  /* Compute partition of previous and next anchors */\n  const partition$ = watchElementSize(document.body)\n    .pipe(\n      distinctUntilKeyChanged(\"height\"),\n\n      /* Build index to map anchor paths to vertical offsets */\n      map(() => {\n        let path: HTMLAnchorElement[] = []\n        return [...table].reduce((index, [anchor, target]) => {\n          while (path.length) {\n            const last = table.get(path[path.length - 1])!\n            if (last.tagName >= target.tagName) {\n              path.pop()\n            } else {\n              break\n            }\n          }\n\n          /* If the current anchor is hidden, continue with its parent */\n          let offset = target.offsetTop\n          while (!offset && target.parentElement) {\n            target = target.parentElement\n            offset = target.offsetTop\n          }\n\n          /* Map reversed anchor path to vertical offset */\n          return index.set(\n            [...path = [...path, anchor]].reverse(),\n            offset\n          )\n        }, new Map<HTMLAnchorElement[], number>())\n      }),\n\n      /* Re-compute partition when viewport offset changes */\n      switchMap(index => combineLatest([adjust$, viewport$])\n        .pipe(\n          scan(([prev, next], [adjust, { offset: { y } }]) => {\n\n            /* Look forward */\n            while (next.length) {\n              const [, offset] = next[0]\n              if (offset - adjust < y) {\n                prev = [...prev, next.shift()!]\n              } else {\n                break\n              }\n            }\n\n            /* Look backward */\n            while (prev.length) {\n              const [, offset] = prev[prev.length - 1]\n              if (offset - adjust >= y) {\n                next = [prev.pop()!, ...next]\n              } else {\n                break\n              }\n            }\n\n            /* Return partition */\n            return [prev, next]\n          }, [[], [...index]]),\n          distinctUntilChanged((a, b) => {\n            return a[0] === b[0]\n                && a[1] === b[1]\n          })\n        )\n      )\n    )\n\n  /* Compute and return anchor list migrations */\n  return partition$\n    .pipe(\n      map(([prev, next]) => ({\n        prev: prev.map(([path]) => path),\n        next: next.map(([path]) => path)\n      })),\n\n      /* Extract anchor list migrations */\n      startWith({ prev: [], next: [] }),\n      bufferCount(2, 1),\n      map(([a, b]) => {\n\n        /* Moving down */\n        if (a.prev.length < b.prev.length) {\n          return {\n            prev: b.prev.slice(Math.max(0, a.prev.length - 1), b.prev.length),\n            next: []\n          }\n\n        /* Moving up */\n        } else {\n          return {\n            prev: b.prev.slice(-1),\n            next: b.next.slice(0, b.next.length - a.next.length)\n          }\n        }\n      })\n    )\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Apply anchor list\n *\n * @param els - Anchor elements\n *\n * @return Operator function\n */\nexport function applyAnchorList(\n  els: HTMLAnchorElement[]\n): MonoTypeOperatorFunction<AnchorList> {\n  return pipe(\n\n    /* Defer repaint to next animation frame */\n    observeOn(animationFrameScheduler),\n    tap(({ prev, next }) => {\n\n      /* Look forward */\n      for (const [el] of next) {\n        resetAnchorActive(el)\n        resetAnchorBlur(el)\n      }\n\n      /* Look backward */\n      prev.forEach(([el], index) => {\n        setAnchorActive(el, index === prev.length - 1)\n        setAnchorBlur(el, true)\n      })\n    }),\n\n    /* Reset on complete or error */\n    finalize(() => {\n      for (const el of els) {\n        resetAnchorActive(el)\n        resetAnchorBlur(el)\n      }\n    })\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable, fromEvent, iif, merge } from \"rxjs\"\nimport { map, mapTo, shareReplay, switchMap } from \"rxjs/operators\"\n\nimport { getElements } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Check whether the given device is an Apple device\n *\n * @return Test result\n */\nfunction isAppleDevice(): boolean {\n  return /(iPad|iPhone|iPod)/.test(navigator.userAgent)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all elements with `data-md-scrollfix` attributes\n *\n * This is a year-old patch which ensures that overflow scrolling works at the\n * top and bottom of containers on iOS by ensuring a `1px` scroll offset upon\n * the start of a touch event.\n *\n * @see https://bit.ly/2SCtAOO - Original source\n *\n * @param options - Options\n */\nexport function patchScrollfix(\n  { document$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements(\"[data-md-scrollfix]\")),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* Remove marker attribute, so we'll only add the fix once */\n  els$.subscribe(els => {\n    for (const el of els)\n      el.removeAttribute(\"data-md-scrollfix\")\n  })\n\n  /* Patch overflow scrolling on touch start */\n  iif(isAppleDevice, els$, NEVER)\n    .pipe(\n      switchMap(els => merge(...els.map(el => (\n        fromEvent(el, \"touchstart\")\n          .pipe(\n            mapTo(el)\n          )\n      ))))\n    )\n      .subscribe(el => {\n        const top = el.scrollTop\n\n        /* We're at the top of the container */\n        if (top === 0) {\n          el.scrollTop = 1\n\n        /* We're at the bottom of the container */\n        } else if (top + el.offsetHeight === el.scrollHeight) {\n          el.scrollTop = top - 1\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { NEVER, Observable } from \"rxjs\"\nimport { catchError, filter, map, switchMap } from \"rxjs/operators\"\n\nimport { getElementOrThrow, getElements } from \"browser\"\nimport { renderSource } from \"templates\"\nimport { cache, hash } from \"utilities\"\n\nimport { fetchSourceFactsFromGitHub } from \"./github\"\nimport { fetchSourceFactsFromGitLab } from \"./gitlab\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Source facts\n */\nexport type SourceFacts = string[]\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch source facts\n *\n * @param url - Source repository URL\n *\n * @return Source facts observable\n */\nfunction fetchSourceFacts(\n  url: string\n): Observable<SourceFacts> {\n  const [type] = url.match(/(git(?:hub|lab))/i) || []\n  switch (type.toLowerCase()) {\n\n    /* GitHub repository */\n    case \"github\":\n      const [, user, repo] = url.match(/^.+github\\.com\\/([^\\/]+)\\/?([^\\/]+)?/i)!\n      return fetchSourceFactsFromGitHub(user, repo)\n\n    /* GitLab repository */\n    case \"gitlab\":\n      const [, base, slug] = url.match(/^.+?([^\\/]*gitlab[^\\/]+)\\/(.+?)\\/?$/i)!\n      return fetchSourceFactsFromGitLab(base, slug)\n\n    /* Everything else */\n    default:\n      return NEVER\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch elements containing repository information\n *\n * This function will retrieve the URL from the repository link and try to\n * query data from integrated source code platforms like GitHub or GitLab.\n *\n * @param options - Options\n */\nexport function patchSource(\n  { document$ }: PatchOptions\n): void {\n  document$\n    .pipe(\n      map(() => getElementOrThrow<HTMLAnchorElement>(\".md-source[href]\")),\n      switchMap(({ href }) => (\n        cache(`${hash(href)}`, () => fetchSourceFacts(href))\n      )),\n      filter(facts => facts.length > 0),\n      catchError(() => NEVER)\n    )\n      .subscribe(facts => {\n        for (const el of getElements(\".md-source__repository\")) {\n          if (!el.hasAttribute(\"data-md-state\")) {\n            el.setAttribute(\"data-md-state\", \"done\")\n            el.appendChild(renderSource(facts))\n          }\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Repo, User } from \"github-types\"\nimport { Observable, from } from \"rxjs\"\nimport {\n  defaultIfEmpty,\n  filter,\n  map,\n  share,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { round } from \"utilities\"\n\nimport { SourceFacts } from \"..\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch GitHub source facts\n *\n * @param user - GitHub user\n * @param repo - GitHub repository\n *\n * @return Source facts observable\n */\nexport function fetchSourceFactsFromGitHub(\n  user: string, repo?: string\n): Observable<SourceFacts> {\n  const url = typeof repo !== \"undefined\"\n    ? `https://api.github.com/repos/${user}/${repo}`\n    : `https://api.github.com/users/${user}`\n  return from(fetch(url))\n    .pipe(\n      filter(res => res.status === 200),\n      switchMap(res => res.json()),\n      map(data => {\n\n        /* GitHub repository */\n        if (typeof repo !== \"undefined\") {\n          const { stargazers_count, forks_count }: Repo = data\n          return [\n            `${round(stargazers_count!)} Stars`,\n            `${round(forks_count!)} Forks`\n          ]\n\n        /* GitHub user/organization */\n        } else {\n          const { public_repos }: User = data\n          return [\n            `${round(public_repos!)} Repositories`\n          ]\n        }\n      }),\n      defaultIfEmpty([]),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { ProjectSchema } from \"gitlab\"\nimport { Observable, from } from \"rxjs\"\nimport {\n  defaultIfEmpty,\n  filter,\n  map,\n  share,\n  switchMap\n} from \"rxjs/operators\"\n\nimport { round } from \"utilities\"\n\nimport { SourceFacts } from \"..\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Fetch GitLab source facts\n *\n * @param base - GitLab base\n * @param project - GitLab project\n *\n * @return Source facts observable\n */\nexport function fetchSourceFactsFromGitLab(\n  base: string, project: string\n): Observable<SourceFacts> {\n  const url = `https://${base}/api/v4/projects/${encodeURIComponent(project)}`\n  return from(fetch(url))\n    .pipe(\n      filter(res => res.status === 200),\n      switchMap(res => res.json()),\n      map(({ star_count, forks_count }: ProjectSchema) => ([\n        `${round(star_count)} Stars`,\n        `${round(forks_count)} Forks`\n      ])),\n      defaultIfEmpty([]),\n      share()\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, defer, of } from \"rxjs\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Cache the last value emitted by an observable in session storage\n *\n * If the key is not found in session storage, the factory is executed and the\n * latest value emitted will automatically be persisted to sessions storage.\n * Note that the values emitted by the returned observable must be serializable\n * as `JSON`, or data will be lost.\n *\n * @template T - Value type\n *\n * @param key - Cache key\n * @param factory - Observable factory\n *\n * @return Value observable\n */\nexport function cache<T>(\n  key: string, factory: () => Observable<T>\n): Observable<T> {\n  return defer(() => {\n    const data = sessionStorage.getItem(key)\n    if (data) {\n      return of(JSON.parse(data) as T)\n\n    /* Retrieve value from observable factory and write to storage */\n    } else {\n      const value$ = factory()\n      value$.subscribe(value => {\n        try {\n          sessionStorage.setItem(key, JSON.stringify(value))\n        } catch (err) {\n          /* Uncritical, just swallow */\n        }\n      })\n\n      /* Return value */\n      return value$\n    }\n  })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\n// DISCLAIMER: this file is still WIP. There're some refactoring opportunities\n// which must be tackled after we gathered some feedback on v5.\n// tslint:disable\n\nimport \"focus-visible\"\n\nimport {\n  merge,\n  combineLatest,\n  animationFrameScheduler,\n  fromEvent,\n  from,\n  defer,\n  of,\n  NEVER\n} from \"rxjs\"\nimport {\n  delay,\n  switchMap,\n  tap,\n  filter,\n  withLatestFrom,\n  observeOn,\n  take,\n  shareReplay,\n  catchError,\n  map,\n  bufferCount,\n  distinctUntilKeyChanged,\n  mapTo,\n  startWith,\n  combineLatestWith,\n  distinctUntilChanged\n} from \"rxjs/operators\"\n\nimport {\n  watchToggle,\n  setToggle,\n  getElements,\n  watchMedia,\n  watchDocument,\n  watchLocation,\n  watchLocationHash,\n  watchViewport,\n  isLocalLocation,\n  setLocationHash,\n  watchLocationBase,\n  getElement\n} from \"browser\"\nimport {\n  mountHeader,\n  mountMain,\n  mountNavigation,\n  mountSearch,\n  mountTableOfContents,\n  mountTabs,\n  useComponent,\n  setupComponents,\n  mountSearchQuery,\n  mountSearchReset,\n  mountSearchResult\n} from \"components\"\nimport {\n  setupClipboard,\n  setupDialog,\n  setupKeyboard,\n  setupInstantLoading,\n  setupSearchWorker,\n  SearchIndex,\n  SearchIndexPipeline\n} from \"integrations\"\nimport {\n  patchCodeBlocks,\n  patchTables,\n  patchDetails,\n  patchScrollfix,\n  patchSource,\n  patchScripts\n} from \"patches\"\nimport { isConfig } from \"utilities\"\n\n/* ------------------------------------------------------------------------- */\n\n/* Denote that JavaScript is available */\ndocument.documentElement.classList.remove(\"no-js\")\ndocument.documentElement.classList.add(\"js\")\n\n/* Test for iOS */\nif (navigator.userAgent.match(/(iPad|iPhone|iPod)/g))\n  document.documentElement.classList.add(\"ios\")\n\n/**\n * Set scroll lock\n *\n * @param el - Scrollable element\n * @param value - Vertical offset\n */\nexport function setScrollLock(\n  el: HTMLElement, value: number\n): void {\n  el.setAttribute(\"data-md-state\", \"lock\")\n  el.style.top = `-${value}px`\n}\n\n/**\n * Reset scroll lock\n *\n * @param el - Scrollable element\n */\nexport function resetScrollLock(\n  el: HTMLElement\n): void {\n  const value = -1 * parseInt(el.style.top, 10)\n  el.removeAttribute(\"data-md-state\")\n  el.style.top = \"\"\n  if (value)\n    window.scrollTo(0, value)\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Initialize Material for MkDocs\n *\n * @param config - Configuration\n */\nexport function initialize(config: unknown) {\n  if (!isConfig(config))\n    throw new SyntaxError(`Invalid configuration: ${JSON.stringify(config)}`)\n\n  /* Set up subjects */\n  const document$ = watchDocument()\n  const location$ = watchLocation()\n\n  /* Set up user interface observables */\n  const base$     = watchLocationBase(config.base, { location$ })\n  const hash$     = watchLocationHash()\n  const viewport$ = watchViewport()\n  const tablet$   = watchMedia(\"(min-width: 960px)\")\n  const screen$   = watchMedia(\"(min-width: 1220px)\")\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Set up component bindings */\n  setupComponents([\n    \"announce\",                        /* Announcement bar */\n    \"container\",                       /* Container */\n    \"header\",                          /* Header */\n    \"header-title\",                    /* Header title */\n    \"main\",                            /* Main area */\n    \"navigation\",                      /* Navigation */\n    \"search\",                          /* Search */\n    \"search-query\",                    /* Search input */\n    \"search-reset\",                    /* Search reset */\n    \"search-result\",                   /* Search results */\n    \"skip\",                            /* Skip link */\n    \"tabs\",                            /* Tabs */\n    \"toc\"                              /* Table of contents */\n  ], { document$ })\n\n  const keyboard$ = setupKeyboard()\n\n  // Hack: only make code blocks focusable on non-touch devices\n  if (matchMedia(\"(hover)\").matches)\n    patchCodeBlocks({ document$, viewport$ })\n  patchDetails({ document$, hash$ })\n  patchScripts({ document$ })\n  patchSource({ document$ })\n  patchTables({ document$ })\n\n  /* Force 1px scroll offset to trigger overflow scrolling */\n  patchScrollfix({ document$ })\n\n  /* Set up clipboard and dialog */\n  const dialog$ = setupDialog()\n  const clipboard$ = setupClipboard({ document$, dialog$ })\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Create header observable */\n  const header$ = useComponent(\"header\")\n    .pipe(\n      mountHeader({ document$, viewport$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  const main$ = useComponent(\"main\")\n    .pipe(\n      mountMain({ header$, viewport$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  const navigation$ = useComponent(\"navigation\")\n    .pipe(\n      mountNavigation({ header$, main$, viewport$, screen$ }),\n      shareReplay({ bufferSize: 1, refCount: true }) // shareReplay because there might be late subscribers\n    )\n\n  const toc$ = useComponent(\"toc\")\n    .pipe(\n      mountTableOfContents({ header$, main$, viewport$, tablet$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  const tabs$ = useComponent(\"tabs\")\n    .pipe(\n      mountTabs({ header$, viewport$, screen$ }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Search worker - only if search is present */\n  const worker$ = useComponent(\"search\")\n    .pipe(\n      switchMap(() => defer(() => {\n        const index = config.search && config.search.index\n          ? config.search.index\n          : undefined\n\n        /* Fetch index if it wasn't passed explicitly */\n        const index$ = (\n          typeof index !== \"undefined\"\n            ? from(index)\n            : base$\n                .pipe(\n                  switchMap(base => fetch(`${base}/search/search_index.json`, {\n                    credentials: \"same-origin\"\n                  }).then(res => res.json())) // SearchIndex\n                )\n        )\n\n        return of(setupSearchWorker(config.search.worker, {\n          base$, index$\n        }))\n      }))\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Mount search query */\n  const search$ = worker$\n    .pipe(\n      switchMap(worker => {\n        const query$ = useComponent<HTMLInputElement>(\"search-query\")\n          .pipe(\n            mountSearchQuery(worker, { transform: config.search.transform }),\n            shareReplay({ bufferSize: 1, refCount: true })\n          )\n\n        /* Mount search reset */\n        const reset$ = useComponent(\"search-reset\")\n          .pipe(\n            mountSearchReset(),\n            shareReplay({ bufferSize: 1, refCount: true })\n          )\n\n        /* Mount search result */\n        const result$ = useComponent(\"search-result\")\n          .pipe(\n            mountSearchResult(worker, { query$ }),\n            shareReplay({ bufferSize: 1, refCount: true })\n          )\n\n        return useComponent(\"search\")\n          .pipe(\n            mountSearch(worker, { query$, reset$, result$ }),\n          )\n      }),\n      catchError(() => {\n        useComponent(\"search\")\n          .subscribe(el => el.hidden = true) // TODO: Hack\n        return NEVER\n      }),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n\n  /* ----------------------------------------------------------------------- */\n\n  // // put into search...\n  hash$\n    .pipe(\n      tap(() => setToggle(\"search\", false)),\n      delay(125), // ensure that it runs after the body scroll reset...\n    )\n      .subscribe(hash => setLocationHash(`#${hash}`))\n\n  // TODO: scroll restoration must be centralized\n  combineLatest([\n    watchToggle(\"search\"),\n    tablet$,\n  ])\n    .pipe(\n      withLatestFrom(viewport$),\n      switchMap(([[toggle, tablet], { offset: { y }}]) => {\n        const active = toggle && !tablet\n        return document$\n          .pipe(\n            delay(active ? 400 : 100),\n            observeOn(animationFrameScheduler),\n            tap(({ body }) => active\n              ? setScrollLock(body, y)\n              : resetScrollLock(body)\n            )\n          )\n      })\n    )\n      .subscribe()\n\n  /* ----------------------------------------------------------------------- */\n\n  /* Always close drawer on click */\n  fromEvent<MouseEvent>(document.body, \"click\")\n    .pipe(\n      filter(ev => !(ev.metaKey || ev.ctrlKey)),\n      filter(ev => {\n        if (ev.target instanceof HTMLElement) {\n          const el = ev.target.closest(\"a\") // TODO: abstract as link click?\n          if (el && isLocalLocation(el)) {\n            return true\n          }\n        }\n        return false\n      })\n    )\n      .subscribe(() => {\n        setToggle(\"drawer\", false)\n      })\n\n  /* Enable instant loading, if not on file:// protocol */\n  if (\n    config.features.includes(\"navigation.instant\") &&\n    location.protocol !== \"file:\"\n  ) {\n    const dom = new DOMParser()\n\n    /* Fetch sitemap and extract URL whitelist */\n    base$\n      .pipe(\n        switchMap(base => from(fetch(`${base}/sitemap.xml`)\n          .then(res => res.text())\n          .then(text => dom.parseFromString(text, \"text/xml\"))\n        )),\n        withLatestFrom(base$),\n        map(([document, base]) => {\n          const urls = getElements(\"loc\", document)\n            .map(node => node.textContent!)\n\n          // Hack: This is a temporary fix to normalize instant loading lookup\n          // on localhost and Netlify previews. If this approach proves to be\n          // suitable, we'll refactor URL whitelisting anyway. We take the two\n          // shortest URLs and determine the common prefix to isolate the\n          // domain. If there're no two domains, we just leave it as-is, as\n          // there isn't anything to be loaded anway.\n          if (urls.length > 1) {\n            const [a, b] = urls.sort((a, b) => a.length - b.length)\n\n            /* Determine common prefix */\n            let index = 0\n            if (a === b)\n              index = a.length\n            else\n              while (a.charAt(index) === b.charAt(index))\n                index++\n\n            /* Replace common prefix (i.e. base) with effective base */\n            for (let i = 0; i < urls.length; i++)\n              urls[i] = urls[i].replace(a.slice(0, index), `${base}/`)\n          }\n          return urls\n        })\n      )\n        .subscribe(urls => {\n          setupInstantLoading(urls, { document$, location$, viewport$ })\n        })\n  }\n\n  /* ----------------------------------------------------------------------- */\n\n  // Make indeterminate toggles indeterminate to expand navigation on screen\n  document$.subscribe(() => {\n    const toggles = getElements<HTMLInputElement>(\"[data-md-state=indeterminate]\")\n    for (const toggle of toggles) {\n      toggle.dataset.mdState = \"\"\n      toggle.indeterminate = true\n      toggle.checked = false\n    }\n  })\n\n  // Auto hide header - this is still experimental, so there might be some\n  // opportunities for refactoring, but we'll address them when this feature\n  // got some feedback from the community.\n  if (config.features.includes(\"header.autohide\")) {\n\n    // Threshold for header-hiding - always show if scrolled less than 400px.\n    // Also, search is not allowed to be active. Maybe make this dynamic.\n    const threshold$ = viewport$\n      .pipe(\n        map(({ offset }) => offset.y > 400),\n        combineLatestWith(watchToggle(\"search\")),\n        map(([threshold, search]) => threshold && !search),\n        distinctUntilChanged()\n      )\n\n    // Scroll direction (true = down, false = up) + inflection point\n    const direction$ = viewport$\n      .pipe(\n        map(({ offset }) => offset.y),\n        bufferCount(2, 1),\n        map(([a, b]) => [a < b, b] as const),\n        distinctUntilKeyChanged(0)\n      )\n\n    // When the threshold is exceeded, and the search is not active, subscribe\n    // to the direction observable (always do a new subscription), and track\n    // scroll progress.\n    const hide$ = threshold$\n      .pipe(\n        switchMap(active => !active\n          ? of(false)\n          : direction$\n              .pipe(\n                combineLatestWith(viewport$),\n                filter(([[, y], { offset }]) => Math.abs(y - offset.y) > 100),\n                map(([[direction]]) => direction)\n              )\n        ),\n        distinctUntilChanged()\n      )\n\n    // Set header state depending on main state. There's still some possibility\n    // for improvement, as the page seems to jump when focusing the unfocused\n    // search. This would mean we would need to delay the focus/change event\n    // until the header is focussed, which we need to address in a refactoring.\n    hide$\n      .pipe(\n        combineLatestWith(main$),\n        map(([hide, main]) => main.active\n          ? hide ? \"hidden\" : \"shadow\"\n          : \"\"\n        ),\n        combineLatestWith(useComponent(\"header\"))\n      )\n        .subscribe(([state, el]) => {\n          el.setAttribute(\"data-md-state\", state)\n        })\n  }\n\n  /* ----------------------------------------------------------------------- */\n\n  const state = {\n\n    /* Browser observables */\n    document$,\n    location$,\n    viewport$,\n\n    /* Component observables */\n    header$,\n    main$,\n    navigation$,\n    search$,\n    tabs$,\n    toc$,\n\n    /* Integration observables */\n    clipboard$,\n    keyboard$,\n    dialog$\n  }\n\n  /* Subscribe to all observables */\n  merge(...Object.values(state))\n    .subscribe()\n  return state\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { SearchIndex, SearchTransformFn } from \"integrations\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Feature flags\n */\nexport type Feature =\n  | \"header.autohide\"                  /* Hide header */\n  | \"navigation.tabs\"                  /* Tabs navigation */\n  | \"navigation.instant\"               /* Instant loading */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Configuration\n */\nexport interface Config {\n  base: string                         /* Base URL */\n  features: Feature[]                  /* Feature flags */\n  search: {\n    worker: string                     /* Worker URL */\n    index?: Promise<SearchIndex>       /* Promise resolving with index */\n    transform?: SearchTransformFn      /* Transformation function */\n  }\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Ensure that the given value is a valid configuration\n *\n * We could use `jsonschema` or any other schema validation framework, but that\n * would just add more bloat to the bundle, so we'll keep it plain and simple.\n *\n * @param config - Configuration\n *\n * @return Test result\n */\nexport function isConfig(config: any): config is Config {\n  return typeof config === \"object\"\n      && typeof config.base === \"string\"\n      && typeof config.features === \"object\"\n      && typeof config.search === \"object\"\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { ReplaySubject, Subject, fromEvent } from \"rxjs\"\nimport { mapTo } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch document\n *\n * Documents must be implemented as subjects, so all downstream observables are\n * automatically updated when a new document is emitted. This enabled features\n * like instant loading.\n *\n * @return Document subject\n */\nexport function watchDocument(): Subject<Document> {\n  const document$ = new ReplaySubject<Document>()\n  fromEvent(document, \"DOMContentLoaded\")\n    .pipe(\n      mapTo(document)\n    )\n      .subscribe(document$)\n\n  /* Return document */\n  return document$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { map, shareReplay, take } from \"rxjs/operators\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Watch options\n */\ninterface WatchOptions {\n  location$: Observable<URL>           /* Location observable */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Watch location base\n *\n * @return Location base observable\n */\nexport function watchLocationBase(\n  base: string, { location$ }: WatchOptions\n): Observable<string> {\n  return location$\n    .pipe(\n      take(1),\n      map(({ href }) => new URL(base, href)\n        .toString()\n        .replace(/\\/$/, \"\")\n      ),\n      shareReplay({ bufferSize: 1, refCount: true })\n    )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, combineLatest } from \"rxjs\"\nimport { distinctUntilKeyChanged, map } from \"rxjs/operators\"\n\nimport { Viewport, getElements } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `code` elements\n *\n * This function will make overflowing code blocks focusable via keyboard, so\n * they can be scrolled without a mouse.\n *\n * @param options - Options\n */\nexport function patchCodeBlocks(\n  { document$, viewport$ }: MountOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements<HTMLTableElement>(\"pre > code\"))\n    )\n\n  /* Observe viewport size only */\n  const size$ = viewport$\n    .pipe(\n      distinctUntilKeyChanged(\"size\")\n    )\n\n  /* Make overflowing elements focusable */\n  combineLatest([els$, size$])\n    .subscribe(([els]) => {\n      for (const el of els) {\n        if (el.scrollWidth > el.clientWidth)\n          el.setAttribute(\"tabindex\", \"0\")\n        else\n          el.removeAttribute(\"tabindex\")\n      }\n    })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, fromEvent, merge } from \"rxjs\"\nimport {\n  filter,\n  map,\n  switchMapTo,\n  tap\n} from \"rxjs/operators\"\n\nimport {\n  getElement,\n  getElements,\n  watchMedia\n} from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n  hash$: Observable<string>            /* Location hash observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `details` elements\n *\n * This function will ensure that all `details` tags are opened prior to\n * printing, so the whole content of the page is included, and on anchor jumps.\n *\n * @param options - Options\n */\nexport function patchDetails(\n  { document$, hash$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      map(() => getElements<HTMLDetailsElement>(\"details\"))\n    )\n\n  /* Open all details before printing */\n  merge(\n    watchMedia(\"print\").pipe(filter(Boolean)),  /* Webkit */\n    fromEvent(window, \"beforeprint\")            /* IE, FF */\n  )\n    .pipe(\n      switchMapTo(els$)\n    )\n      .subscribe(els => {\n        for (const el of els)\n          el.setAttribute(\"open\", \"\")\n      })\n\n  /* Open parent details and fix anchor jump */\n  hash$\n    .pipe(\n      map(id => getElement(`[id=\"${id}\"]`)!),\n      filter(el => typeof el !== \"undefined\"),\n      tap(el => {\n        const details = el.closest(\"details\")\n        if (details && !details.open)\n          details.setAttribute(\"open\", \"\")\n      })\n    )\n      .subscribe(el => el.scrollIntoView())\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { EMPTY, Observable, noop, of } from \"rxjs\"\nimport {\n  concatMap,\n  map,\n  skip,\n  switchMap,\n  withLatestFrom\n} from \"rxjs/operators\"\n\nimport {\n  createElement,\n  getElements,\n  replaceElement\n} from \"browser\"\nimport { useComponent } from \"components\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch options\n */\ninterface PatchOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `script` elements\n *\n * This function must be run after a document switch, which means the first\n * emission must be ignored.\n *\n * @param options - Options\n */\nexport function patchScripts(\n  { document$ }: PatchOptions\n): void {\n  const els$ = document$\n    .pipe(\n      skip(1),\n      withLatestFrom(useComponent(\"container\")),\n      map(([, el]) => getElements<HTMLScriptElement>(\"script\", el))\n    )\n\n  /* Evaluate all scripts via replacement in order */\n  els$\n    .pipe(\n      switchMap(els => of(...els)),\n      concatMap(el => {\n        const script = createElement(\"script\")\n        if (el.src) {\n          script.src = el.src\n          replaceElement(el, script)\n\n          /* Complete when script is loaded */\n          return new Observable(observer => {\n            script.onload = () => observer.complete()\n          })\n\n        /* Complete immediately */\n        } else {\n          script.textContent = el.textContent!\n          replaceElement(el, script)\n          return EMPTY\n        }\n      })\n    )\n      .subscribe(noop)\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable } from \"rxjs\"\nimport { map } from \"rxjs/operators\"\n\nimport {\n  createElement,\n  getElements,\n  replaceElement\n} from \"browser\"\nimport { renderTable } from \"templates\"\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  document$: Observable<Document>      /* Document observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Patch all `table` elements\n *\n * This function will re-render all tables by wrapping them to improve overflow\n * scrolling on smaller screen sizes.\n *\n * @param options - Options\n */\nexport function patchTables(\n  { document$ }: MountOptions\n): void {\n  const sentinel = createElement(\"table\")\n  document$\n    .pipe(\n      map(() => getElements<HTMLTableElement>(\"table:not([class])\"))\n    )\n      .subscribe(els => {\n        for (const el of els) {\n          replaceElement(el, sentinel)\n          replaceElement(sentinel, renderTable(el))\n        }\n      })\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { h } from \"utilities\"\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Render a table inside a wrapper to improve scrolling on mobile\n *\n * @param table - Table element\n *\n * @return Element\n */\nexport function renderTable(\n  table: HTMLTableElement\n) {\n  return (\n    <div class=\"md-typeset__scrollwrap\">\n      <div class=\"md-typeset__table\">\n        {table}\n      </div>\n    </div>\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Subject, animationFrameScheduler, noop, of } from \"rxjs\"\nimport {\n  delay,\n  map,\n  observeOn,\n  switchMap,\n  tap\n} from \"rxjs/operators\"\n\nimport { createElement } from \"browser\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Setup options\n */\ninterface SetupOptions {\n  duration?: number                    /* Display duration (default: 2s) */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Set up dialog\n *\n * @param options - Options\n *\n * @return Dialog observable\n */\nexport function setupDialog(\n  { duration }: SetupOptions = {}\n): Subject<string> {\n  const dialog$ = new Subject<string>()\n\n  /* Create dialog */\n  const dialog = createElement(\"div\")                                           // TODO: improve scoping\n  dialog.classList.add(\"md-dialog\", \"md-typeset\")\n\n  /* Display dialog */\n  dialog$\n    .pipe(\n      switchMap(text => of(document.body) // useComponent(\"container\")\n        .pipe(\n          map(container => container.appendChild(dialog)),\n          observeOn(animationFrameScheduler),\n          delay(1), // Strangley it doesnt work when we push things to the new animation frame...\n          tap(el => {\n            el.innerHTML = text\n            el.setAttribute(\"data-md-state\", \"open\")\n          }),\n          delay(duration || 2000),\n          tap(el => el.removeAttribute(\"data-md-state\")),\n          delay(400),\n          tap(el => {\n            el.innerHTML = \"\"\n            el.remove()\n          })\n        )\n      )\n    )\n      .subscribe(noop)\n\n  /* Return dialog */\n  return dialog$\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, of, pipe } from \"rxjs\"\nimport { map, switchMap } from \"rxjs/operators\"\n\nimport { Viewport } from \"browser\"\n\nimport { Header } from \"../header\"\nimport { Main } from \"../main\"\nimport {\n  Sidebar,\n  applySidebar,\n  watchSidebar\n} from \"../shared\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Navigation for [screen -]\n */\ninterface NavigationBelowScreen {} // tslint:disable-line\n\n/**\n * Navigation for [screen +]\n */\ninterface NavigationAboveScreen {\n  sidebar: Sidebar                     /* Sidebar */\n}\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Navigation\n */\nexport type Navigation =\n  | NavigationBelowScreen\n  | NavigationAboveScreen\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  header$: Observable<Header>          /* Header observable */\n  main$: Observable<Main>              /* Main area observable */\n  viewport$: Observable<Viewport>      /* Viewport observable */\n  screen$: Observable<boolean>         /* Screen media observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount navigation from source observable\n *\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountNavigation(\n  { header$, main$, viewport$, screen$ }: MountOptions\n): OperatorFunction<HTMLElement, Navigation> {\n  return pipe(\n    switchMap(el => screen$\n      .pipe(\n        switchMap(screen => {\n\n          /* [screen +]: Mount navigation in sidebar */\n          if (screen) {\n            return watchSidebar(el, { main$, viewport$ })\n              .pipe(\n                applySidebar(el, { header$ }),\n                map(sidebar => ({ sidebar }))\n              )\n\n          /* [screen -]: Mount navigation in drawer */\n          } else {\n            return of({})\n          }\n        })\n      )\n    )\n  )\n}\n","/*\n * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to\n * deal in the Software without restriction, including without limitation the\n * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or\n * sell copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS\n * IN THE SOFTWARE.\n */\n\nimport { Observable, OperatorFunction, combineLatest, pipe } from \"rxjs\"\nimport {\n  filter,\n  map,\n  mapTo,\n  sample,\n  startWith,\n  switchMap,\n  take\n} from \"rxjs/operators\"\n\nimport { WorkerHandler } from \"browser\"\nimport {\n  SearchMessage,\n  SearchResult,\n  isSearchQueryMessage,\n  isSearchReadyMessage\n} from \"integrations/search\"\n\nimport { SearchQuery } from \"../query\"\n\n/* ----------------------------------------------------------------------------\n * Types\n * ------------------------------------------------------------------------- */\n\n/**\n * Search status\n */\nexport type SearchStatus =\n  | \"waiting\"                          /* Search waiting for initialization */\n  | \"ready\"                            /* Search ready */\n\n/* ------------------------------------------------------------------------- */\n\n/**\n * Search\n */\nexport interface Search {\n  status: SearchStatus                 /* Search status */\n  query: SearchQuery                   /* Search query */\n  result: SearchResult[]               /* Search result list */\n}\n\n/* ----------------------------------------------------------------------------\n * Helper types\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount options\n */\ninterface MountOptions {\n  query$: Observable<SearchQuery>      /* Search query observable */\n  reset$: Observable<void>             /* Search reset observable */\n  result$: Observable<SearchResult[]>  /* Search result observable */\n}\n\n/* ----------------------------------------------------------------------------\n * Functions\n * ------------------------------------------------------------------------- */\n\n/**\n * Mount search from source observable\n *\n * @param handler - Worker handler\n * @param options - Options\n *\n * @return Operator function\n */\nexport function mountSearch(\n  { rx$, tx$ }: WorkerHandler<SearchMessage>,\n  { query$, reset$, result$ }: MountOptions\n): OperatorFunction<HTMLElement, Search> {\n  return pipe(\n    switchMap(() => {\n\n      /* Compute search status */\n      const status$ = rx$\n        .pipe(\n          filter(isSearchReadyMessage),\n          mapTo<SearchStatus>(\"ready\"),\n          startWith(\"waiting\")\n        ) as Observable<SearchStatus>\n\n      /* Re-emit the latest query when search is ready */\n      tx$\n        .pipe(\n          filter(isSearchQueryMessage),\n          sample(status$),\n          take(1)\n        )\n          .subscribe(tx$.next.bind(tx$))\n\n      /* Combine into single observable */\n      return combineLatest([status$, query$, result$, reset$])\n        .pipe(\n          map(([status, query, result]) => ({\n            status,\n            query,\n            result\n          }))\n        )\n    })\n  )\n}\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/assets/javascripts/vendor.53cc9318.min.js b/assets/javascripts/vendor.18f0862e.min.js
similarity index 80%
rename from assets/javascripts/vendor.53cc9318.min.js
rename to assets/javascripts/vendor.18f0862e.min.js
index 908e53a7..bf1d0f08 100644
--- a/assets/javascripts/vendor.53cc9318.min.js
+++ b/assets/javascripts/vendor.18f0862e.min.js
@@ -1,16 +1,16 @@
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{ isFunction } from './isFunction';\nexport function hasLift(source) {\n    return isFunction(source === null || source === void 0 ? void 0 : source.lift);\n}\nexport function operate(init) {\n    return (source) => {\n        if (hasLift(source)) {\n            return source.lift(function (liftedSource) {\n                try {\n                    return init(liftedSource, this);\n                }\n                catch (err) {\n                    this.error(err);\n                }\n            });\n        }\n        throw new TypeError('Unable to lift unknown Observable type');\n    };\n}\n//# sourceMappingURL=lift.js.map","import { Subscriber } from '../Subscriber';\nexport class OperatorSubscriber extends Subscriber {\n    constructor(destination, onNext, onError, onComplete, onUnsubscribe) {\n        super(destination);\n        this.onUnsubscribe = onUnsubscribe;\n        this._next = onNext\n            ? function (value) {\n                try {\n                    onNext(value);\n                }\n                catch (err) {\n                    this.destination.error(err);\n                }\n            }\n            : super._next;\n        this._error = onError\n            ? function (err) {\n                try {\n                    onError(err);\n                }\n                catch (err) {\n                    this.destination.error(err);\n                }\n                this.unsubscribe();\n            }\n            : super._error;\n        this._complete = onComplete\n            ? function () {\n                try {\n                    onComplete();\n                }\n                catch (err) {\n                    this.destination.error(err);\n                }\n                this.unsubscribe();\n            }\n            : super._complete;\n    }\n    unsubscribe() {\n        var _a;\n        !this.closed && ((_a = this.onUnsubscribe) === null || _a === void 0 ? void 0 : _a.call(this));\n        super.unsubscribe();\n    }\n}\n//# sourceMappingURL=OperatorSubscriber.js.map","export function isFunction(value) {\n    return typeof value === 'function';\n}\n//# sourceMappingURL=isFunction.js.map","import { SafeSubscriber, Subscriber } from './Subscriber';\nimport { isSubscription } from './Subscription';\nimport { observable as Symbol_observable } from './symbol/observable';\nimport { pipeFromArray } from './util/pipe';\nimport { config } from './config';\nimport { isFunction } from './util/isFunction';\nexport class Observable {\n    constructor(subscribe) {\n        if (subscribe) {\n            this._subscribe = subscribe;\n        }\n    }\n    lift(operator) {\n        const observable = new Observable();\n        observable.source = this;\n        observable.operator = operator;\n        return observable;\n    }\n    subscribe(observerOrNext, error, complete) {\n        const subscriber = isSubscriber(observerOrNext) ? observerOrNext : new SafeSubscriber(observerOrNext, error, complete);\n        const { operator, source } = this;\n        subscriber.add(operator\n            ? operator.call(subscriber, source)\n            : source || config.useDeprecatedSynchronousErrorHandling\n                ? this._subscribe(subscriber)\n                : this._trySubscribe(subscriber));\n        return subscriber;\n    }\n    _trySubscribe(sink) {\n        try {\n            return this._subscribe(sink);\n        }\n        catch (err) {\n            if (config.useDeprecatedSynchronousErrorHandling) {\n                throw err;\n            }\n            sink.error(err);\n        }\n    }\n    forEach(next, promiseCtor) {\n        promiseCtor = getPromiseCtor(promiseCtor);\n        return new promiseCtor((resolve, reject) => {\n            let subscription;\n            subscription = this.subscribe((value) => {\n                try {\n                    next(value);\n                }\n                catch (err) {\n                    reject(err);\n                    subscription === null || subscription === void 0 ? void 0 : subscription.unsubscribe();\n                }\n            }, reject, resolve);\n        });\n    }\n    _subscribe(subscriber) {\n        var _a;\n        return (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber);\n    }\n    [Symbol_observable]() {\n        return this;\n    }\n    pipe(...operations) {\n        return operations.length ? pipeFromArray(operations)(this) : this;\n    }\n    toPromise(promiseCtor) {\n        promiseCtor = getPromiseCtor(promiseCtor);\n        return new promiseCtor((resolve, reject) => {\n            let value;\n            this.subscribe((x) => (value = x), (err) => reject(err), () => resolve(value));\n        });\n    }\n}\nObservable.create = (subscribe) => {\n    return new Observable(subscribe);\n};\nfunction getPromiseCtor(promiseCtor) {\n    var _a;\n    return (_a = promiseCtor !== null && promiseCtor !== void 0 ? promiseCtor : config.Promise) !== null && _a !== void 0 ? _a : Promise;\n}\nfunction isObserver(value) {\n    return value && isFunction(value.next) && isFunction(value.error) && isFunction(value.complete);\n}\nfunction isSubscriber(value) {\n    return (value && value instanceof Subscriber) || (isObserver(value) && isSubscription(value));\n}\n//# sourceMappingURL=Observable.js.map","/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = function(d, b) {\r\n    extendStatics = Object.setPrototypeOf ||\r\n        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n    return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n    if (typeof b !== \"function\" && b !== null)\r\n        throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n    __assign = Object.assign || function __assign(t) {\r\n        for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n            s = arguments[i];\r\n            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n        }\r\n        return t;\r\n    }\r\n    return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n    var t = {};\r\n    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n        t[p] = s[p];\r\n    if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n                t[p[i]] = s[p[i]];\r\n        }\r\n    return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n    return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n    return new (P || (P = Promise))(function (resolve, reject) {\r\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n        function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n        step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n    });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [op[0] & 2, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });\r\n}) : (function(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n    for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n    if (m) return m.call(o);\r\n    if (o && typeof o.length === \"number\") return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n    if (!m) return o;\r\n    var i = m.call(o), r, ar = [], e;\r\n    try {\r\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n    }\r\n    catch (error) { e = { error: error }; }\r\n    finally {\r\n        try {\r\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n        }\r\n        finally { if (e) throw e.error; }\r\n    }\r\n    return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n    for (var ar = [], i = 0; i < arguments.length; i++)\r\n        ar = ar.concat(__read(arguments[i]));\r\n    return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n    for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n            r[k] = a[j];\r\n    return r;\r\n}\r\n\r\nexport function __spreadArray(to, from) {\r\n    for (var i = 0, il = from.length, j = to.length; i < il; i++, j++)\r\n        to[j] = from[i];\r\n    return to;\r\n}\r\n\r\nexport function __await(v) {\r\n    return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n    return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n    function fulfill(value) { resume(\"next\", value); }\r\n    function reject(value) { resume(\"throw\", value); }\r\n    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n    var i, p;\r\n    return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var m = o[Symbol.asyncIterator], i;\r\n    return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n    if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n    return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n    Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n    o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n    if (mod && mod.__esModule) return mod;\r\n    var result = {};\r\n    if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n    __setModuleDefault(result, mod);\r\n    return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n    return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, privateMap) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to get private field on non-instance\");\r\n    }\r\n    return privateMap.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, privateMap, value) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to set private field on non-instance\");\r\n    }\r\n    privateMap.set(receiver, value);\r\n    return value;\r\n}\r\n","import { isFunction } from \"./isFunction\";\nexport function isPromise(value) {\n    return isFunction(value === null || value === void 0 ? void 0 : value.then);\n}\n//# sourceMappingURL=isPromise.js.map","export function getSymbolIterator() {\n    if (typeof Symbol !== 'function' || !Symbol.iterator) {\n        return '@@iterator';\n    }\n    return Symbol.iterator;\n}\nexport const iterator = getSymbolIterator();\nexport const $$iterator = iterator;\n//# sourceMappingURL=iterator.js.map","import { observable as Symbol_observable } from '../symbol/observable';\nimport { isFunction } from './isFunction';\nexport function isInteropObservable(input) {\n    return isFunction(input[Symbol_observable]);\n}\n//# sourceMappingURL=isInteropObservable.js.map","import { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { isFunction } from './isFunction';\nexport function isIterable(input) {\n    return isFunction(input === null || input === void 0 ? void 0 : input[Symbol_iterator]);\n}\n//# sourceMappingURL=isIterable.js.map","import { isFunction } from './isFunction';\nexport function isAsyncIterable(obj) {\n    return Symbol.asyncIterator && isFunction(obj === null || obj === void 0 ? void 0 : obj[Symbol.asyncIterator]);\n}\n//# sourceMappingURL=isAsyncIterable.js.map","export function createInvalidObservableTypeError(input) {\n    return new TypeError(`You provided ${input !== null && typeof input === 'object' ? 'an invalid object' : `'${input}'`} where a stream was expected. You can provide an Observable, Promise, Array, AsyncIterable, or Iterable.`);\n}\n//# sourceMappingURL=throwUnobservableError.js.map","import { scheduleObservable } from './scheduleObservable';\nimport { schedulePromise } from './schedulePromise';\nimport { scheduleArray } from './scheduleArray';\nimport { scheduleIterable } from './scheduleIterable';\nimport { isInteropObservable } from '../util/isInteropObservable';\nimport { isPromise } from '../util/isPromise';\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isIterable } from '../util/isIterable';\nimport { scheduleAsyncIterable } from './scheduleAsyncIterable';\nimport { isAsyncIterable } from '../util/isAsyncIterable';\nimport { createInvalidObservableTypeError } from '../util/throwUnobservableError';\nexport function scheduled(input, scheduler) {\n    if (input != null) {\n        if (isInteropObservable(input)) {\n            return scheduleObservable(input, scheduler);\n        }\n        if (isArrayLike(input)) {\n            return scheduleArray(input, scheduler);\n        }\n        if (isPromise(input)) {\n            return schedulePromise(input, scheduler);\n        }\n        if (isAsyncIterable(input)) {\n            return scheduleAsyncIterable(input, scheduler);\n        }\n        if (isIterable(input)) {\n            return scheduleIterable(input, scheduler);\n        }\n    }\n    throw createInvalidObservableTypeError(input);\n}\n//# sourceMappingURL=scheduled.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nimport { observable as Symbol_observable } from '../symbol/observable';\nexport function scheduleObservable(input, scheduler) {\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        sub.add(scheduler.schedule(() => {\n            const observable = input[Symbol_observable]();\n            sub.add(observable.subscribe({\n                next(value) { sub.add(scheduler.schedule(() => subscriber.next(value))); },\n                error(err) { sub.add(scheduler.schedule(() => subscriber.error(err))); },\n                complete() { sub.add(scheduler.schedule(() => subscriber.complete())); },\n            }));\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleObservable.js.map","import { Observable } from '../Observable';\nexport function schedulePromise(input, scheduler) {\n    return new Observable((subscriber) => {\n        return scheduler.schedule(() => input.then((value) => {\n            subscriber.add(scheduler.schedule(() => {\n                subscriber.next(value);\n                subscriber.add(scheduler.schedule(() => subscriber.complete()));\n            }));\n        }, (err) => {\n            subscriber.add(scheduler.schedule(() => subscriber.error(err)));\n        }));\n    });\n}\n//# sourceMappingURL=schedulePromise.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nexport function scheduleAsyncIterable(input, scheduler) {\n    if (!input) {\n        throw new Error('Iterable cannot be null');\n    }\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        sub.add(scheduler.schedule(() => {\n            const iterator = input[Symbol.asyncIterator]();\n            sub.add(scheduler.schedule(function () {\n                iterator.next().then(result => {\n                    if (result.done) {\n                        subscriber.complete();\n                    }\n                    else {\n                        subscriber.next(result.value);\n                        this.schedule();\n                    }\n                });\n            }));\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleAsyncIterable.js.map","import { Observable } from '../Observable';\nimport { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { isFunction } from '../util/isFunction';\nimport { caughtSchedule } from '../util/caughtSchedule';\nexport function scheduleIterable(input, scheduler) {\n    return new Observable((subscriber) => {\n        let iterator;\n        subscriber.add(scheduler.schedule(() => {\n            iterator = input[Symbol_iterator]();\n            caughtSchedule(subscriber, scheduler, function () {\n                const { value, done } = iterator.next();\n                if (done) {\n                    subscriber.complete();\n                }\n                else {\n                    subscriber.next(value);\n                    this.schedule();\n                }\n            });\n        }));\n        return () => isFunction(iterator === null || iterator === void 0 ? void 0 : iterator.return) && iterator.return();\n    });\n}\n//# sourceMappingURL=scheduleIterable.js.map","export function caughtSchedule(subscriber, scheduler, execute, delay = 0) {\n    const subscription = scheduler.schedule(function () {\n        try {\n            execute.call(this);\n        }\n        catch (err) {\n            subscriber.error(err);\n        }\n    }, delay);\n    subscriber.add(subscription);\n    return subscription;\n}\n//# sourceMappingURL=caughtSchedule.js.map","import { __asyncValues, __awaiter } from \"tslib\";\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isPromise } from '../util/isPromise';\nimport { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { observable as Symbol_observable } from '../symbol/observable';\nimport { Observable } from '../Observable';\nimport { scheduled } from '../scheduled/scheduled';\nimport { isFunction } from '../util/isFunction';\nimport { reportUnhandledError } from '../util/reportUnhandledError';\nimport { isInteropObservable } from '../util/isInteropObservable';\nimport { isAsyncIterable } from '../util/isAsyncIterable';\nimport { createInvalidObservableTypeError } from '../util/throwUnobservableError';\nimport { isIterable } from '../util/isIterable';\nexport function from(input, scheduler) {\n    return scheduler ? scheduled(input, scheduler) : innerFrom(input);\n}\nexport function innerFrom(input) {\n    if (input instanceof Observable) {\n        return input;\n    }\n    if (input != null) {\n        if (isInteropObservable(input)) {\n            return fromInteropObservable(input);\n        }\n        if (isArrayLike(input)) {\n            return fromArrayLike(input);\n        }\n        if (isPromise(input)) {\n            return fromPromise(input);\n        }\n        if (isAsyncIterable(input)) {\n            return fromAsyncIterable(input);\n        }\n        if (isIterable(input)) {\n            return fromIterable(input);\n        }\n    }\n    throw createInvalidObservableTypeError(input);\n}\nfunction fromInteropObservable(obj) {\n    return new Observable((subscriber) => {\n        const obs = obj[Symbol_observable]();\n        if (isFunction(obs.subscribe)) {\n            return obs.subscribe(subscriber);\n        }\n        throw new TypeError('Provided object does not correctly implement Symbol.observable');\n    });\n}\nexport function fromArrayLike(array) {\n    return new Observable((subscriber) => {\n        for (let i = 0; i < array.length && !subscriber.closed; i++) {\n            subscriber.next(array[i]);\n        }\n        subscriber.complete();\n    });\n}\nfunction fromPromise(promise) {\n    return new Observable((subscriber) => {\n        promise\n            .then((value) => {\n            if (!subscriber.closed) {\n                subscriber.next(value);\n                subscriber.complete();\n            }\n        }, (err) => subscriber.error(err))\n            .then(null, reportUnhandledError);\n    });\n}\nfunction fromIterable(iterable) {\n    return new Observable((subscriber) => {\n        const iterator = iterable[Symbol_iterator]();\n        while (!subscriber.closed) {\n            const { done, value } = iterator.next();\n            if (done) {\n                subscriber.complete();\n            }\n            else {\n                subscriber.next(value);\n            }\n        }\n        return () => isFunction(iterator === null || iterator === void 0 ? void 0 : iterator.return) && iterator.return();\n    });\n}\nfunction fromAsyncIterable(asyncIterable) {\n    return new Observable((subscriber) => {\n        process(asyncIterable, subscriber).catch((err) => subscriber.error(err));\n    });\n}\nfunction process(asyncIterable, subscriber) {\n    var asyncIterable_1, asyncIterable_1_1;\n    var e_1, _a;\n    return __awaiter(this, void 0, void 0, function* () {\n        try {\n            for (asyncIterable_1 = __asyncValues(asyncIterable); asyncIterable_1_1 = yield asyncIterable_1.next(), !asyncIterable_1_1.done;) {\n                const value = asyncIterable_1_1.value;\n                subscriber.next(value);\n            }\n        }\n        catch (e_1_1) { e_1 = { error: e_1_1 }; }\n        finally {\n            try {\n                if (asyncIterable_1_1 && !asyncIterable_1_1.done && (_a = asyncIterable_1.return)) yield _a.call(asyncIterable_1);\n            }\n            finally { if (e_1) throw e_1.error; }\n        }\n        subscriber.complete();\n    });\n}\n//# sourceMappingURL=from.js.map","import { isFunction } from './isFunction';\nimport { isScheduler } from './isScheduler';\nfunction last(arr) {\n    return arr[arr.length - 1];\n}\nexport function popResultSelector(args) {\n    return isFunction(last(args)) ? args.pop() : undefined;\n}\nexport function popScheduler(args) {\n    return isScheduler(last(args)) ? args.pop() : undefined;\n}\nexport function popNumber(args, defaultValue) {\n    return typeof last(args) === 'number' ? args.pop() : defaultValue;\n}\n//# sourceMappingURL=args.js.map","export function noop() { }\n//# sourceMappingURL=noop.js.map","import { createErrorClass } from './createErrorClass';\nexport const UnsubscriptionError = createErrorClass((_super) => function UnsubscriptionErrorImpl(errors) {\n    _super(this);\n    this.message = errors\n        ? `${errors.length} errors occurred during unsubscription:\n${errors.map((err, i) => `${i + 1}) ${err.toString()}`).join('\\n  ')}`\n        : '';\n    this.name = 'UnsubscriptionError';\n    this.errors = errors;\n});\n//# sourceMappingURL=UnsubscriptionError.js.map","import { isFunction } from './util/isFunction';\nimport { UnsubscriptionError } from './util/UnsubscriptionError';\nimport { arrRemove } from './util/arrRemove';\nexport class Subscription {\n    constructor(initialTeardown) {\n        this.initialTeardown = initialTeardown;\n        this.closed = false;\n        this._parentage = null;\n        this._teardowns = null;\n    }\n    unsubscribe() {\n        let errors;\n        if (!this.closed) {\n            this.closed = true;\n            const { _parentage } = this;\n            if (Array.isArray(_parentage)) {\n                for (const parent of _parentage) {\n                    parent.remove(this);\n                }\n            }\n            else {\n                _parentage === null || _parentage === void 0 ? void 0 : _parentage.remove(this);\n            }\n            const { initialTeardown } = this;\n            if (isFunction(initialTeardown)) {\n                try {\n                    initialTeardown();\n                }\n                catch (e) {\n                    errors = e instanceof UnsubscriptionError ? e.errors : [e];\n                }\n            }\n            const { _teardowns } = this;\n            if (_teardowns) {\n                this._teardowns = null;\n                for (const teardown of _teardowns) {\n                    try {\n                        execTeardown(teardown);\n                    }\n                    catch (err) {\n                        errors = errors !== null && errors !== void 0 ? errors : [];\n                        if (err instanceof UnsubscriptionError) {\n                            errors = [...errors, ...err.errors];\n                        }\n                        else {\n                            errors.push(err);\n                        }\n                    }\n                }\n            }\n            if (errors) {\n                throw new UnsubscriptionError(errors);\n            }\n        }\n    }\n    add(teardown) {\n        var _a;\n        if (teardown && teardown !== this) {\n            if (this.closed) {\n                execTeardown(teardown);\n            }\n            else {\n                if (teardown instanceof Subscription) {\n                    if (teardown.closed || teardown._hasParent(this)) {\n                        return;\n                    }\n                    teardown._addParent(this);\n                }\n                (this._teardowns = (_a = this._teardowns) !== null && _a !== void 0 ? _a : []).push(teardown);\n            }\n        }\n    }\n    _hasParent(parent) {\n        const { _parentage } = this;\n        return _parentage === parent || (Array.isArray(_parentage) && _parentage.includes(parent));\n    }\n    _addParent(parent) {\n        const { _parentage } = this;\n        this._parentage = Array.isArray(_parentage) ? (_parentage.push(parent), _parentage) : _parentage ? [_parentage, parent] : parent;\n    }\n    _removeParent(parent) {\n        const { _parentage } = this;\n        if (_parentage === parent) {\n            this._parentage = null;\n        }\n        else if (Array.isArray(_parentage)) {\n            arrRemove(_parentage, parent);\n        }\n    }\n    remove(teardown) {\n        const { _teardowns } = this;\n        _teardowns && arrRemove(_teardowns, teardown);\n        if (teardown instanceof Subscription) {\n            teardown._removeParent(this);\n        }\n    }\n}\nSubscription.EMPTY = (() => {\n    const empty = new Subscription();\n    empty.closed = true;\n    return empty;\n})();\nexport const EMPTY_SUBSCRIPTION = Subscription.EMPTY;\nexport function isSubscription(value) {\n    return (value instanceof Subscription ||\n        (value && 'closed' in value && isFunction(value.remove) && isFunction(value.add) && isFunction(value.unsubscribe)));\n}\nfunction execTeardown(teardown) {\n    if (isFunction(teardown)) {\n        teardown();\n    }\n    else {\n        teardown.unsubscribe();\n    }\n}\n//# sourceMappingURL=Subscription.js.map","export function identity(x) {\n    return x;\n}\n//# sourceMappingURL=identity.js.map","export const config = {\n    onUnhandledError: null,\n    onStoppedNotification: null,\n    Promise: undefined,\n    useDeprecatedSynchronousErrorHandling: false,\n    useDeprecatedNextContext: false,\n};\n//# sourceMappingURL=config.js.map","export function arrRemove(arr, item) {\n    if (arr) {\n        const index = arr.indexOf(item);\n        0 <= index && arr.splice(index, 1);\n    }\n}\n//# sourceMappingURL=arrRemove.js.map","import { map } from './map';\nimport { innerFrom } from '../observable/from';\nimport { operate } from '../util/lift';\nimport { mergeInternals } from './mergeInternals';\nimport { isFunction } from '../util/isFunction';\nexport function mergeMap(project, resultSelector, concurrent = Infinity) {\n    if (isFunction(resultSelector)) {\n        return mergeMap((a, i) => map((b, ii) => resultSelector(a, b, i, ii))(innerFrom(project(a, i))), concurrent);\n    }\n    else if (typeof resultSelector === 'number') {\n        concurrent = resultSelector;\n    }\n    return operate((source, subscriber) => mergeInternals(source, subscriber, project, concurrent));\n}\nexport const flatMap = mergeMap;\n//# sourceMappingURL=mergeMap.js.map","import { innerFrom } from '../observable/from';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function mergeInternals(source, subscriber, project, concurrent, onBeforeNext, expand, innerSubScheduler, additionalTeardown) {\n    let buffer = [];\n    let active = 0;\n    let index = 0;\n    let isComplete = false;\n    const checkComplete = () => {\n        if (isComplete && !buffer.length && !active) {\n            subscriber.complete();\n        }\n    };\n    const outerNext = (value) => (active < concurrent ? doInnerSub(value) : buffer.push(value));\n    const doInnerSub = (value) => {\n        expand && subscriber.next(value);\n        active++;\n        innerFrom(project(value, index++)).subscribe(new OperatorSubscriber(subscriber, (innerValue) => {\n            onBeforeNext === null || onBeforeNext === void 0 ? void 0 : onBeforeNext(innerValue);\n            if (expand) {\n                outerNext(innerValue);\n            }\n            else {\n                subscriber.next(innerValue);\n            }\n        }, undefined, () => {\n            active--;\n            while (buffer.length && active < concurrent) {\n                const bufferedValue = buffer.shift();\n                innerSubScheduler ? subscriber.add(innerSubScheduler.schedule(() => doInnerSub(bufferedValue))) : doInnerSub(bufferedValue);\n            }\n            checkComplete();\n        }));\n    };\n    source.subscribe(new OperatorSubscriber(subscriber, outerNext, undefined, () => {\n        isComplete = true;\n        checkComplete();\n    }));\n    return () => {\n        buffer = null;\n        additionalTeardown === null || additionalTeardown === void 0 ? void 0 : additionalTeardown();\n    };\n}\n//# sourceMappingURL=mergeInternals.js.map","export const observable = (() => (typeof Symbol === 'function' && Symbol.observable) || '@@observable')();\n//# sourceMappingURL=observable.js.map","import { scheduleArray } from '../scheduled/scheduleArray';\nimport { fromArrayLike } from './from';\nexport function internalFromArray(input, scheduler) {\n    return scheduler ? scheduleArray(input, scheduler) : fromArrayLike(input);\n}\n//# sourceMappingURL=fromArray.js.map","export const COMPLETE_NOTIFICATION = (() => createNotification('C', undefined, undefined))();\nexport function errorNotification(error) {\n    return createNotification('E', undefined, error);\n}\nexport function nextNotification(value) {\n    return createNotification('N', value, undefined);\n}\nexport function createNotification(kind, value, error) {\n    return {\n        kind,\n        value,\n        error,\n    };\n}\n//# sourceMappingURL=NotificationFactories.js.map","import { isFunction } from './util/isFunction';\nimport { isSubscription, Subscription } from './Subscription';\nimport { config } from './config';\nimport { reportUnhandledError } from './util/reportUnhandledError';\nimport { noop } from './util/noop';\nimport { nextNotification, errorNotification, COMPLETE_NOTIFICATION } from './NotificationFactories';\nimport { timeoutProvider } from './scheduler/timeoutProvider';\nexport class Subscriber extends Subscription {\n    constructor(destination) {\n        super();\n        this.isStopped = false;\n        if (destination) {\n            this.destination = destination;\n            if (isSubscription(destination)) {\n                destination.add(this);\n            }\n        }\n        else {\n            this.destination = EMPTY_OBSERVER;\n        }\n    }\n    static create(next, error, complete) {\n        return new SafeSubscriber(next, error, complete);\n    }\n    next(value) {\n        if (this.isStopped) {\n            handleStoppedNotification(nextNotification(value), this);\n        }\n        else {\n            this._next(value);\n        }\n    }\n    error(err) {\n        if (this.isStopped) {\n            handleStoppedNotification(errorNotification(err), this);\n        }\n        else {\n            this.isStopped = true;\n            this._error(err);\n        }\n    }\n    complete() {\n        if (this.isStopped) {\n            handleStoppedNotification(COMPLETE_NOTIFICATION, this);\n        }\n        else {\n            this.isStopped = true;\n            this._complete();\n        }\n    }\n    unsubscribe() {\n        if (!this.closed) {\n            this.isStopped = true;\n            super.unsubscribe();\n        }\n    }\n    _next(value) {\n        this.destination.next(value);\n    }\n    _error(err) {\n        this.destination.error(err);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.destination.complete();\n        this.unsubscribe();\n    }\n}\nexport class SafeSubscriber extends Subscriber {\n    constructor(observerOrNext, error, complete) {\n        super();\n        this.destination = EMPTY_OBSERVER;\n        if ((observerOrNext || error || complete) && observerOrNext !== EMPTY_OBSERVER) {\n            let next;\n            if (isFunction(observerOrNext)) {\n                next = observerOrNext;\n            }\n            else if (observerOrNext) {\n                ({ next, error, complete } = observerOrNext);\n                let context;\n                if (this && config.useDeprecatedNextContext) {\n                    context = Object.create(observerOrNext);\n                    context.unsubscribe = () => this.unsubscribe();\n                }\n                else {\n                    context = observerOrNext;\n                }\n                next = next === null || next === void 0 ? void 0 : next.bind(context);\n                error = error === null || error === void 0 ? void 0 : error.bind(context);\n                complete = complete === null || complete === void 0 ? void 0 : complete.bind(context);\n            }\n            this.destination = {\n                next: next || noop,\n                error: error || defaultErrorHandler,\n                complete: complete || noop,\n            };\n        }\n    }\n}\nfunction defaultErrorHandler(err) {\n    if (config.useDeprecatedSynchronousErrorHandling) {\n        throw err;\n    }\n    reportUnhandledError(err);\n}\nfunction handleStoppedNotification(notification, subscriber) {\n    const { onStoppedNotification } = config;\n    onStoppedNotification && timeoutProvider.setTimeout(() => onStoppedNotification(notification, subscriber));\n}\nexport const EMPTY_OBSERVER = {\n    closed: true,\n    next: noop,\n    error: defaultErrorHandler,\n    complete: noop,\n};\n//# sourceMappingURL=Subscriber.js.map","import { map } from \"../operators/map\";\nconst { isArray } = Array;\nfunction callOrApply(fn, args) {\n    return isArray(args) ? fn(...args) : fn(args);\n}\nexport function mapOneOrManyArgs(fn) {\n    return map(args => callOrApply(fn, args));\n}\n//# sourceMappingURL=mapOneOrManyArgs.js.map","export const isArrayLike = ((x) => x && typeof x.length === 'number' && typeof x !== 'function');\n//# sourceMappingURL=isArrayLike.js.map","import { Observable } from '../Observable';\nexport function scheduleArray(input, scheduler) {\n    return new Observable((subscriber) => {\n        let i = 0;\n        return scheduler.schedule(function () {\n            if (i === input.length) {\n                subscriber.complete();\n            }\n            else {\n                subscriber.next(input[i++]);\n                if (!subscriber.closed) {\n                    this.schedule();\n                }\n            }\n        });\n    });\n}\n//# sourceMappingURL=scheduleArray.js.map","const { isArray } = Array;\nexport function argsOrArgArray(args) {\n    return args.length === 1 && isArray(args[0]) ? args[0] : args;\n}\n//# sourceMappingURL=argsOrArgArray.js.map","import { Observable } from '../Observable';\nexport const EMPTY = new Observable(subscriber => subscriber.complete());\nexport function empty(scheduler) {\n    return scheduler ? emptyScheduled(scheduler) : EMPTY;\n}\nfunction emptyScheduled(scheduler) {\n    return new Observable(subscriber => scheduler.schedule(() => subscriber.complete()));\n}\n//# sourceMappingURL=empty.js.map","import { AsyncAction } from './AsyncAction';\nimport { AsyncScheduler } from './AsyncScheduler';\nexport const asyncScheduler = new AsyncScheduler(AsyncAction);\nexport const async = asyncScheduler;\n//# sourceMappingURL=async.js.map","import { createErrorClass } from './createErrorClass';\nexport const ObjectUnsubscribedError = createErrorClass((_super) => function ObjectUnsubscribedErrorImpl() {\n    _super(this);\n    this.name = 'ObjectUnsubscribedError';\n    this.message = 'object unsubscribed';\n});\n//# sourceMappingURL=ObjectUnsubscribedError.js.map","import { Observable } from './Observable';\nimport { Subscription, EMPTY_SUBSCRIPTION } from './Subscription';\nimport { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';\nimport { arrRemove } from './util/arrRemove';\nexport class Subject extends Observable {\n    constructor() {\n        super();\n        this.observers = [];\n        this.closed = false;\n        this.isStopped = false;\n        this.hasError = false;\n        this.thrownError = null;\n    }\n    lift(operator) {\n        const subject = new AnonymousSubject(this, this);\n        subject.operator = operator;\n        return subject;\n    }\n    _throwIfClosed() {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n    }\n    next(value) {\n        this._throwIfClosed();\n        if (!this.isStopped) {\n            const copy = this.observers.slice();\n            for (const observer of copy) {\n                observer.next(value);\n            }\n        }\n    }\n    error(err) {\n        this._throwIfClosed();\n        if (!this.isStopped) {\n            this.hasError = this.isStopped = true;\n            this.thrownError = err;\n            const { observers } = this;\n            while (observers.length) {\n                observers.shift().error(err);\n            }\n        }\n    }\n    complete() {\n        this._throwIfClosed();\n        if (!this.isStopped) {\n            this.isStopped = true;\n            const { observers } = this;\n            while (observers.length) {\n                observers.shift().complete();\n            }\n        }\n    }\n    unsubscribe() {\n        this.isStopped = this.closed = true;\n        this.observers = null;\n    }\n    _trySubscribe(subscriber) {\n        this._throwIfClosed();\n        return super._trySubscribe(subscriber);\n    }\n    _subscribe(subscriber) {\n        this._throwIfClosed();\n        this._checkFinalizedStatuses(subscriber);\n        return this._innerSubscribe(subscriber);\n    }\n    _innerSubscribe(subscriber) {\n        const { hasError, isStopped, observers } = this;\n        return hasError || isStopped\n            ? EMPTY_SUBSCRIPTION\n            : (observers.push(subscriber), new Subscription(() => arrRemove(this.observers, subscriber)));\n    }\n    _checkFinalizedStatuses(subscriber) {\n        const { hasError, thrownError, isStopped } = this;\n        if (hasError) {\n            subscriber.error(thrownError);\n        }\n        else if (isStopped) {\n            subscriber.complete();\n        }\n    }\n    asObservable() {\n        const observable = new Observable();\n        observable.source = this;\n        return observable;\n    }\n}\nSubject.create = (destination, source) => {\n    return new AnonymousSubject(destination, source);\n};\nexport class AnonymousSubject extends Subject {\n    constructor(destination, source) {\n        super();\n        this.destination = destination;\n        this.source = source;\n    }\n    next(value) {\n        var _a, _b;\n        (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.next) === null || _b === void 0 ? void 0 : _b.call(_a, value);\n    }\n    error(err) {\n        var _a, _b;\n        (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.error) === null || _b === void 0 ? void 0 : _b.call(_a, err);\n    }\n    complete() {\n        var _a, _b;\n        (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.complete) === null || _b === void 0 ? void 0 : _b.call(_a);\n    }\n    _subscribe(subscriber) {\n        var _a, _b;\n        return (_b = (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber)) !== null && _b !== void 0 ? _b : EMPTY_SUBSCRIPTION;\n    }\n}\n//# sourceMappingURL=Subject.js.map","import { concatAll } from '../operators/concatAll';\nimport { internalFromArray } from './fromArray';\nimport { popScheduler } from '../util/args';\nexport function concat(...args) {\n    return concatAll()(internalFromArray(args, popScheduler(args)));\n}\n//# sourceMappingURL=concat.js.map","import { mergeAll } from './mergeAll';\nexport function concatAll() {\n    return mergeAll(1);\n}\n//# sourceMappingURL=concatAll.js.map","export function createErrorClass(createImpl) {\n    const _super = (instance) => {\n        Error.call(instance);\n        instance.stack = new Error().stack;\n    };\n    const ctorFunc = createImpl(_super);\n    ctorFunc.prototype = Object.create(Error.prototype);\n    ctorFunc.prototype.constructor = ctorFunc;\n    return ctorFunc;\n}\n//# sourceMappingURL=createErrorClass.js.map","import { config } from '../config';\nimport { timeoutProvider } from '../scheduler/timeoutProvider';\nexport function reportUnhandledError(err) {\n    timeoutProvider.setTimeout(() => {\n        const { onUnhandledError } = config;\n        if (onUnhandledError) {\n            onUnhandledError(err);\n        }\n        else {\n            throw err;\n        }\n    });\n}\n//# sourceMappingURL=reportUnhandledError.js.map","export const timeoutProvider = {\n    setTimeout(...args) {\n        const { delegate } = timeoutProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.setTimeout) || setTimeout)(...args);\n    },\n    clearTimeout(handle) {\n        const { delegate } = timeoutProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.clearTimeout) || clearTimeout)(handle);\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=timeoutProvider.js.map","import { identity } from './identity';\nexport function pipe(...fns) {\n    return pipeFromArray(fns);\n}\nexport function pipeFromArray(fns) {\n    if (fns.length === 0) {\n        return identity;\n    }\n    if (fns.length === 1) {\n        return fns[0];\n    }\n    return function piped(input) {\n        return fns.reduce((prev, fn) => fn(prev), input);\n    };\n}\n//# sourceMappingURL=pipe.js.map","export const dateTimestampProvider = {\n    now() {\n        return (dateTimestampProvider.delegate || Date).now();\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=dateTimestampProvider.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function map(project, thisArg) {\n    return operate((source, subscriber) => {\n        let index = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            subscriber.next(project.call(thisArg, value, index++));\n        }));\n    });\n}\n//# sourceMappingURL=map.js.map","import { isFunction } from './isFunction';\nexport function isScheduler(value) {\n    return value && isFunction(value.schedule);\n}\n//# sourceMappingURL=isScheduler.js.map","import { mergeMap } from './mergeMap';\nimport { identity } from '../util/identity';\nexport function mergeAll(concurrent = Infinity) {\n    return mergeMap(identity, concurrent);\n}\n//# sourceMappingURL=mergeAll.js.map","import { Subscription } from '../Subscription';\nexport class Action extends Subscription {\n    constructor(scheduler, work) {\n        super();\n    }\n    schedule(state, delay = 0) {\n        return this;\n    }\n}\n//# sourceMappingURL=Action.js.map","export const intervalProvider = {\n    setInterval(...args) {\n        const { delegate } = intervalProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.setInterval) || setInterval)(...args);\n    },\n    clearInterval(handle) {\n        const { delegate } = intervalProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.clearInterval) || clearInterval)(handle);\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=intervalProvider.js.map","import { Action } from './Action';\nimport { intervalProvider } from './intervalProvider';\nimport { arrRemove } from '../util/arrRemove';\nexport class AsyncAction extends Action {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n        this.pending = false;\n    }\n    schedule(state, delay = 0) {\n        if (this.closed) {\n            return this;\n        }\n        this.state = state;\n        const id = this.id;\n        const scheduler = this.scheduler;\n        if (id != null) {\n            this.id = this.recycleAsyncId(scheduler, id, delay);\n        }\n        this.pending = true;\n        this.delay = delay;\n        this.id = this.id || this.requestAsyncId(scheduler, this.id, delay);\n        return this;\n    }\n    requestAsyncId(scheduler, _id, delay = 0) {\n        return intervalProvider.setInterval(scheduler.flush.bind(scheduler, this), delay);\n    }\n    recycleAsyncId(_scheduler, id, delay = 0) {\n        if (delay != null && this.delay === delay && this.pending === false) {\n            return id;\n        }\n        intervalProvider.clearInterval(id);\n        return undefined;\n    }\n    execute(state, delay) {\n        if (this.closed) {\n            return new Error('executing a cancelled action');\n        }\n        this.pending = false;\n        const error = this._execute(state, delay);\n        if (error) {\n            return error;\n        }\n        else if (this.pending === false && this.id != null) {\n            this.id = this.recycleAsyncId(this.scheduler, this.id, null);\n        }\n    }\n    _execute(state, _delay) {\n        let errored = false;\n        let errorValue;\n        try {\n            this.work(state);\n        }\n        catch (e) {\n            errored = true;\n            errorValue = (!!e && e) || new Error(e);\n        }\n        if (errored) {\n            this.unsubscribe();\n            return errorValue;\n        }\n    }\n    unsubscribe() {\n        if (!this.closed) {\n            const { id, scheduler } = this;\n            const { actions } = scheduler;\n            this.work = this.state = this.scheduler = null;\n            this.pending = false;\n            arrRemove(actions, this);\n            if (id != null) {\n                this.id = this.recycleAsyncId(scheduler, id, null);\n            }\n            this.delay = null;\n            super.unsubscribe();\n        }\n    }\n}\n//# sourceMappingURL=AsyncAction.js.map","import { Observable } from '../Observable';\nimport { async as asyncScheduler } from '../scheduler/async';\nimport { isScheduler } from '../util/isScheduler';\nimport { isValidDate } from '../util/isDate';\nexport function timer(dueTime = 0, intervalOrScheduler, scheduler = asyncScheduler) {\n    let intervalDuration = -1;\n    if (intervalOrScheduler != null) {\n        if (isScheduler(intervalOrScheduler)) {\n            scheduler = intervalOrScheduler;\n        }\n        else {\n            intervalDuration = intervalOrScheduler;\n        }\n    }\n    return new Observable((subscriber) => {\n        let due = isValidDate(dueTime) ? +dueTime - scheduler.now() : dueTime;\n        if (due < 0) {\n            due = 0;\n        }\n        let n = 0;\n        return scheduler.schedule(function () {\n            if (!subscriber.closed) {\n                subscriber.next(n++);\n                if (0 <= intervalDuration) {\n                    this.schedule(undefined, intervalDuration);\n                }\n                else {\n                    subscriber.complete();\n                }\n            }\n        }, due);\n    });\n}\n//# sourceMappingURL=timer.js.map","export function isValidDate(value) {\n    return value instanceof Date && !isNaN(value);\n}\n//# sourceMappingURL=isDate.js.map","import { dateTimestampProvider } from \"./scheduler/dateTimestampProvider\";\nexport class Scheduler {\n    constructor(schedulerActionCtor, now = Scheduler.now) {\n        this.schedulerActionCtor = schedulerActionCtor;\n        this.now = now;\n    }\n    schedule(work, delay = 0, state) {\n        return new this.schedulerActionCtor(this, work).schedule(state, delay);\n    }\n}\nScheduler.now = dateTimestampProvider.now;\n//# sourceMappingURL=Scheduler.js.map","import { Scheduler } from '../Scheduler';\nexport class AsyncScheduler extends Scheduler {\n    constructor(SchedulerAction, now = Scheduler.now) {\n        super(SchedulerAction, now);\n        this.actions = [];\n        this.active = false;\n        this.scheduled = undefined;\n    }\n    flush(action) {\n        const { actions } = this;\n        if (this.active) {\n            actions.push(action);\n            return;\n        }\n        let error;\n        this.active = true;\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (action = actions.shift());\n        this.active = false;\n        if (error) {\n            while (action = actions.shift()) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AsyncScheduler.js.map","import { innerFrom } from '../observable/from';\nimport { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function switchMap(project, resultSelector) {\n    return operate((source, subscriber) => {\n        let innerSubscriber = null;\n        let index = 0;\n        let isComplete = false;\n        const checkComplete = () => isComplete && !innerSubscriber && subscriber.complete();\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            innerSubscriber === null || innerSubscriber === void 0 ? void 0 : innerSubscriber.unsubscribe();\n            let innerIndex = 0;\n            const outerIndex = index++;\n            innerFrom(project(value, outerIndex)).subscribe((innerSubscriber = new OperatorSubscriber(subscriber, (innerValue) => subscriber.next(resultSelector ? resultSelector(value, innerValue, outerIndex, innerIndex++) : innerValue), undefined, () => {\n                innerSubscriber = null;\n                checkComplete();\n            })));\n        }, undefined, () => {\n            isComplete = true;\n            checkComplete();\n        }));\n    });\n}\n//# sourceMappingURL=switchMap.js.map","import { EMPTY } from '../observable/empty';\nimport { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function take(count) {\n    return count <= 0\n        ?\n            () => EMPTY\n        : operate((source, subscriber) => {\n            let seen = 0;\n            source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n                if (++seen <= count) {\n                    subscriber.next(value);\n                    if (count <= seen) {\n                        subscriber.complete();\n                    }\n                }\n            }));\n        });\n}\n//# sourceMappingURL=take.js.map","/*!\n * clipboard.js v2.0.6\n * https://clipboardjs.com/\n * \n * Licensed MIT © Zeno Rocha\n */\n(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"ClipboardJS\"] = factory();\n\telse\n\t\troot[\"ClipboardJS\"] = factory();\n})(this, function() {\nreturn /******/ (function(modules) { // webpackBootstrap\n/******/ \t// The module cache\n/******/ \tvar installedModules = {};\n/******/\n/******/ \t// The require function\n/******/ \tfunction __webpack_require__(moduleId) {\n/******/\n/******/ \t\t// Check if module is in cache\n/******/ \t\tif(installedModules[moduleId]) {\n/******/ \t\t\treturn installedModules[moduleId].exports;\n/******/ \t\t}\n/******/ \t\t// Create a new module (and put it into the cache)\n/******/ \t\tvar module = installedModules[moduleId] = {\n/******/ \t\t\ti: moduleId,\n/******/ \t\t\tl: false,\n/******/ \t\t\texports: {}\n/******/ \t\t};\n/******/\n/******/ \t\t// Execute the module function\n/******/ 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for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n/******/ \t\treturn ns;\n/******/ \t};\n/******/\n/******/ \t// getDefaultExport function for compatibility with non-harmony modules\n/******/ \t__webpack_require__.n = function(module) {\n/******/ \t\tvar getter = module && module.__esModule ?\n/******/ \t\t\tfunction getDefault() { return module['default']; } :\n/******/ \t\t\tfunction getModuleExports() { return module; };\n/******/ \t\t__webpack_require__.d(getter, 'a', getter);\n/******/ \t\treturn getter;\n/******/ \t};\n/******/\n/******/ \t// Object.prototype.hasOwnProperty.call\n/******/ \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n/******/\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"\";\n/******/\n/******/\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(__webpack_require__.s = 6);\n/******/ })\n/************************************************************************/\n/******/ ([\n/* 0 */\n/***/ (function(module, exports) {\n\nfunction select(element) {\n    var selectedText;\n\n    if (element.nodeName === 'SELECT') {\n        element.focus();\n\n        selectedText = element.value;\n    }\n    else if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA') {\n        var isReadOnly = element.hasAttribute('readonly');\n\n        if (!isReadOnly) {\n            element.setAttribute('readonly', '');\n        }\n\n        element.select();\n        element.setSelectionRange(0, element.value.length);\n\n        if (!isReadOnly) {\n            element.removeAttribute('readonly');\n        }\n\n        selectedText = element.value;\n    }\n    else {\n        if (element.hasAttribute('contenteditable')) {\n            element.focus();\n        }\n\n        var selection = window.getSelection();\n        var range = document.createRange();\n\n        range.selectNodeContents(element);\n        selection.removeAllRanges();\n        selection.addRange(range);\n\n        selectedText = selection.toString();\n    }\n\n    return selectedText;\n}\n\nmodule.exports = select;\n\n\n/***/ }),\n/* 1 */\n/***/ (function(module, exports) {\n\nfunction E () {\n  // Keep this empty so it's easier to inherit from\n  // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n  on: function (name, callback, ctx) {\n    var e = this.e || (this.e = {});\n\n    (e[name] || (e[name] = [])).push({\n      fn: callback,\n      ctx: ctx\n    });\n\n    return this;\n  },\n\n  once: function (name, callback, ctx) {\n    var self = this;\n    function listener () {\n      self.off(name, listener);\n      callback.apply(ctx, arguments);\n    };\n\n    listener._ = callback\n    return this.on(name, listener, ctx);\n  },\n\n  emit: function (name) {\n    var data = [].slice.call(arguments, 1);\n    var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n    var i = 0;\n    var len = evtArr.length;\n\n    for (i; i < len; i++) {\n      evtArr[i].fn.apply(evtArr[i].ctx, data);\n    }\n\n    return this;\n  },\n\n  off: function (name, callback) {\n    var e = this.e || (this.e = {});\n    var evts = e[name];\n    var liveEvents = [];\n\n    if (evts && callback) {\n      for (var i = 0, len = evts.length; i < len; i++) {\n        if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n          liveEvents.push(evts[i]);\n      }\n    }\n\n    // Remove event from queue to prevent memory leak\n    // Suggested by https://github.com/lazd\n    // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n    (liveEvents.length)\n      ? e[name] = liveEvents\n      : delete e[name];\n\n    return this;\n  }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n\n\n/***/ }),\n/* 2 */\n/***/ (function(module, exports, __webpack_require__) {\n\nvar is = __webpack_require__(3);\nvar delegate = __webpack_require__(4);\n\n/**\n * Validates all params and calls the right\n * listener function based on its target type.\n *\n * @param {String|HTMLElement|HTMLCollection|NodeList} target\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listen(target, type, callback) {\n    if (!target && !type && !callback) {\n        throw new Error('Missing required arguments');\n    }\n\n    if (!is.string(type)) {\n        throw new TypeError('Second argument must be a String');\n    }\n\n    if (!is.fn(callback)) {\n        throw new TypeError('Third argument must be a Function');\n    }\n\n    if (is.node(target)) {\n        return listenNode(target, type, callback);\n    }\n    else if (is.nodeList(target)) {\n        return listenNodeList(target, type, callback);\n    }\n    else if (is.string(target)) {\n        return listenSelector(target, type, callback);\n    }\n    else {\n        throw new TypeError('First argument must be a String, HTMLElement, HTMLCollection, or NodeList');\n    }\n}\n\n/**\n * Adds an event listener to a HTML element\n * and returns a remove listener function.\n *\n * @param {HTMLElement} node\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listenNode(node, type, callback) {\n    node.addEventListener(type, callback);\n\n    return {\n        destroy: function() {\n            node.removeEventListener(type, callback);\n        }\n    }\n}\n\n/**\n * Add an event listener to a list of HTML elements\n * and returns a remove listener function.\n *\n * @param {NodeList|HTMLCollection} nodeList\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listenNodeList(nodeList, type, callback) {\n    Array.prototype.forEach.call(nodeList, function(node) {\n        node.addEventListener(type, callback);\n    });\n\n    return {\n        destroy: function() {\n            Array.prototype.forEach.call(nodeList, function(node) {\n                node.removeEventListener(type, callback);\n            });\n        }\n    }\n}\n\n/**\n * Add an event listener to a selector\n * and returns a remove listener function.\n *\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listenSelector(selector, type, callback) {\n    return delegate(document.body, selector, type, callback);\n}\n\nmodule.exports = listen;\n\n\n/***/ }),\n/* 3 */\n/***/ (function(module, exports) {\n\n/**\n * Check if argument is a HTML element.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.node = function(value) {\n    return value !== undefined\n        && value instanceof HTMLElement\n        && value.nodeType === 1;\n};\n\n/**\n * Check if argument is a list of HTML elements.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.nodeList = function(value) {\n    var type = Object.prototype.toString.call(value);\n\n    return value !== undefined\n        && (type === '[object NodeList]' || type === '[object HTMLCollection]')\n        && ('length' in value)\n        && (value.length === 0 || exports.node(value[0]));\n};\n\n/**\n * Check if argument is a string.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.string = function(value) {\n    return typeof value === 'string'\n        || value instanceof String;\n};\n\n/**\n * Check if argument is a function.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.fn = function(value) {\n    var type = Object.prototype.toString.call(value);\n\n    return type === '[object Function]';\n};\n\n\n/***/ }),\n/* 4 */\n/***/ (function(module, exports, __webpack_require__) {\n\nvar closest = __webpack_require__(5);\n\n/**\n * Delegates event to a selector.\n *\n * @param {Element} element\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @param {Boolean} useCapture\n * @return {Object}\n */\nfunction _delegate(element, selector, type, callback, useCapture) {\n    var listenerFn = listener.apply(this, arguments);\n\n    element.addEventListener(type, listenerFn, useCapture);\n\n    return {\n        destroy: function() {\n            element.removeEventListener(type, listenerFn, useCapture);\n        }\n    }\n}\n\n/**\n * Delegates event to a selector.\n *\n * @param {Element|String|Array} [elements]\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @param {Boolean} useCapture\n * @return {Object}\n */\nfunction delegate(elements, selector, type, callback, useCapture) {\n    // Handle the regular Element usage\n    if (typeof elements.addEventListener === 'function') {\n        return _delegate.apply(null, arguments);\n    }\n\n    // Handle Element-less usage, it defaults to global delegation\n    if (typeof type === 'function') {\n        // Use `document` as the first parameter, then apply arguments\n        // This is a short way to .unshift `arguments` without running into deoptimizations\n        return _delegate.bind(null, document).apply(null, arguments);\n    }\n\n    // Handle Selector-based usage\n    if (typeof elements === 'string') {\n        elements = document.querySelectorAll(elements);\n    }\n\n    // Handle Array-like based usage\n    return Array.prototype.map.call(elements, function (element) {\n        return _delegate(element, selector, type, callback, useCapture);\n    });\n}\n\n/**\n * Finds closest match and invokes callback.\n *\n * @param {Element} element\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @return {Function}\n */\nfunction listener(element, selector, type, callback) {\n    return function(e) {\n        e.delegateTarget = closest(e.target, selector);\n\n        if (e.delegateTarget) {\n            callback.call(element, e);\n        }\n    }\n}\n\nmodule.exports = delegate;\n\n\n/***/ }),\n/* 5 */\n/***/ (function(module, exports) {\n\nvar DOCUMENT_NODE_TYPE = 9;\n\n/**\n * A polyfill for Element.matches()\n */\nif (typeof Element !== 'undefined' && !Element.prototype.matches) {\n    var proto = Element.prototype;\n\n    proto.matches = proto.matchesSelector ||\n                    proto.mozMatchesSelector ||\n                    proto.msMatchesSelector ||\n                    proto.oMatchesSelector ||\n                    proto.webkitMatchesSelector;\n}\n\n/**\n * Finds the closest parent that matches a selector.\n *\n * @param {Element} element\n * @param {String} selector\n * @return {Function}\n */\nfunction closest (element, selector) {\n    while (element && element.nodeType !== DOCUMENT_NODE_TYPE) {\n        if (typeof element.matches === 'function' &&\n            element.matches(selector)) {\n          return element;\n        }\n        element = element.parentNode;\n    }\n}\n\nmodule.exports = closest;\n\n\n/***/ }),\n/* 6 */\n/***/ (function(module, __webpack_exports__, __webpack_require__) {\n\n\"use strict\";\n__webpack_require__.r(__webpack_exports__);\n\n// EXTERNAL MODULE: ./node_modules/select/src/select.js\nvar src_select = __webpack_require__(0);\nvar select_default = /*#__PURE__*/__webpack_require__.n(src_select);\n\n// CONCATENATED MODULE: ./src/clipboard-action.js\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n\n\n/**\n * Inner class which performs selection from either `text` or `target`\n * properties and then executes copy or cut operations.\n */\n\nvar clipboard_action_ClipboardAction = function () {\n    /**\n     * @param {Object} options\n     */\n    function ClipboardAction(options) {\n        _classCallCheck(this, ClipboardAction);\n\n        this.resolveOptions(options);\n        this.initSelection();\n    }\n\n    /**\n     * Defines base properties passed from constructor.\n     * @param {Object} options\n     */\n\n\n    _createClass(ClipboardAction, [{\n        key: 'resolveOptions',\n        value: function resolveOptions() {\n            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n            this.action = options.action;\n            this.container = options.container;\n            this.emitter = options.emitter;\n            this.target = options.target;\n            this.text = options.text;\n            this.trigger = options.trigger;\n\n            this.selectedText = '';\n        }\n\n        /**\n         * Decides which selection strategy is going to be applied based\n         * on the existence of `text` and `target` properties.\n         */\n\n    }, {\n        key: 'initSelection',\n        value: function initSelection() {\n            if (this.text) {\n                this.selectFake();\n            } else if (this.target) {\n                this.selectTarget();\n            }\n        }\n\n        /**\n         * Creates a fake textarea element, sets its value from `text` property,\n         * and makes a selection on it.\n         */\n\n    }, {\n        key: 'selectFake',\n        value: function selectFake() {\n            var _this = this;\n\n            var isRTL = document.documentElement.getAttribute('dir') == 'rtl';\n\n            this.removeFake();\n\n            this.fakeHandlerCallback = function () {\n                return _this.removeFake();\n            };\n            this.fakeHandler = this.container.addEventListener('click', this.fakeHandlerCallback) || true;\n\n            this.fakeElem = document.createElement('textarea');\n            // Prevent zooming on iOS\n            this.fakeElem.style.fontSize = '12pt';\n            // Reset box model\n            this.fakeElem.style.border = '0';\n            this.fakeElem.style.padding = '0';\n            this.fakeElem.style.margin = '0';\n            // Move element out of screen horizontally\n            this.fakeElem.style.position = 'absolute';\n            this.fakeElem.style[isRTL ? 'right' : 'left'] = '-9999px';\n            // Move element to the same position vertically\n            var yPosition = window.pageYOffset || document.documentElement.scrollTop;\n            this.fakeElem.style.top = yPosition + 'px';\n\n            this.fakeElem.setAttribute('readonly', '');\n            this.fakeElem.value = this.text;\n\n            this.container.appendChild(this.fakeElem);\n\n            this.selectedText = select_default()(this.fakeElem);\n            this.copyText();\n        }\n\n        /**\n         * Only removes the fake element after another click event, that way\n         * a user can hit `Ctrl+C` to copy because selection still exists.\n         */\n\n    }, {\n        key: 'removeFake',\n        value: function removeFake() {\n            if (this.fakeHandler) {\n                this.container.removeEventListener('click', this.fakeHandlerCallback);\n                this.fakeHandler = null;\n                this.fakeHandlerCallback = null;\n            }\n\n            if (this.fakeElem) {\n                this.container.removeChild(this.fakeElem);\n                this.fakeElem = null;\n            }\n        }\n\n        /**\n         * Selects the content from element passed on `target` property.\n         */\n\n    }, {\n        key: 'selectTarget',\n        value: function selectTarget() {\n            this.selectedText = select_default()(this.target);\n            this.copyText();\n        }\n\n        /**\n         * Executes the copy operation based on the current selection.\n         */\n\n    }, {\n        key: 'copyText',\n        value: function copyText() {\n            var succeeded = void 0;\n\n            try {\n                succeeded = document.execCommand(this.action);\n            } catch (err) {\n                succeeded = false;\n            }\n\n            this.handleResult(succeeded);\n        }\n\n        /**\n         * Fires an event based on the copy operation result.\n         * @param {Boolean} succeeded\n         */\n\n    }, {\n        key: 'handleResult',\n        value: function handleResult(succeeded) {\n            this.emitter.emit(succeeded ? 'success' : 'error', {\n                action: this.action,\n                text: this.selectedText,\n                trigger: this.trigger,\n                clearSelection: this.clearSelection.bind(this)\n            });\n        }\n\n        /**\n         * Moves focus away from `target` and back to the trigger, removes current selection.\n         */\n\n    }, {\n        key: 'clearSelection',\n        value: function clearSelection() {\n            if (this.trigger) {\n                this.trigger.focus();\n            }\n            document.activeElement.blur();\n            window.getSelection().removeAllRanges();\n        }\n\n        /**\n         * Sets the `action` to be performed which can be either 'copy' or 'cut'.\n         * @param {String} action\n         */\n\n    }, {\n        key: 'destroy',\n\n\n        /**\n         * Destroy lifecycle.\n         */\n        value: function destroy() {\n            this.removeFake();\n        }\n    }, {\n        key: 'action',\n        set: function set() {\n            var action = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'copy';\n\n            this._action = action;\n\n            if (this._action !== 'copy' && this._action !== 'cut') {\n                throw new Error('Invalid \"action\" value, use either \"copy\" or \"cut\"');\n            }\n        }\n\n        /**\n         * Gets the `action` property.\n         * @return {String}\n         */\n        ,\n        get: function get() {\n            return this._action;\n        }\n\n        /**\n         * Sets the `target` property using an element\n         * that will be have its content copied.\n         * @param {Element} target\n         */\n\n    }, {\n        key: 'target',\n        set: function set(target) {\n            if (target !== undefined) {\n                if (target && (typeof target === 'undefined' ? 'undefined' : _typeof(target)) === 'object' && target.nodeType === 1) {\n                    if (this.action === 'copy' && target.hasAttribute('disabled')) {\n                        throw new Error('Invalid \"target\" attribute. Please use \"readonly\" instead of \"disabled\" attribute');\n                    }\n\n                    if (this.action === 'cut' && (target.hasAttribute('readonly') || target.hasAttribute('disabled'))) {\n                        throw new Error('Invalid \"target\" attribute. You can\\'t cut text from elements with \"readonly\" or \"disabled\" attributes');\n                    }\n\n                    this._target = target;\n                } else {\n                    throw new Error('Invalid \"target\" value, use a valid Element');\n                }\n            }\n        }\n\n        /**\n         * Gets the `target` property.\n         * @return {String|HTMLElement}\n         */\n        ,\n        get: function get() {\n            return this._target;\n        }\n    }]);\n\n    return ClipboardAction;\n}();\n\n/* harmony default export */ var clipboard_action = (clipboard_action_ClipboardAction);\n// EXTERNAL MODULE: ./node_modules/tiny-emitter/index.js\nvar tiny_emitter = __webpack_require__(1);\nvar tiny_emitter_default = /*#__PURE__*/__webpack_require__.n(tiny_emitter);\n\n// EXTERNAL MODULE: ./node_modules/good-listener/src/listen.js\nvar listen = __webpack_require__(2);\nvar listen_default = /*#__PURE__*/__webpack_require__.n(listen);\n\n// CONCATENATED MODULE: ./src/clipboard.js\nvar clipboard_typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar clipboard_createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction clipboard_classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\n\n\n\n\n/**\n * Base class which takes one or more elements, adds event listeners to them,\n * and instantiates a new `ClipboardAction` on each click.\n */\n\nvar clipboard_Clipboard = function (_Emitter) {\n    _inherits(Clipboard, _Emitter);\n\n    /**\n     * @param {String|HTMLElement|HTMLCollection|NodeList} trigger\n     * @param {Object} options\n     */\n    function Clipboard(trigger, options) {\n        clipboard_classCallCheck(this, Clipboard);\n\n        var _this = _possibleConstructorReturn(this, (Clipboard.__proto__ || Object.getPrototypeOf(Clipboard)).call(this));\n\n        _this.resolveOptions(options);\n        _this.listenClick(trigger);\n        return _this;\n    }\n\n    /**\n     * Defines if attributes would be resolved using internal setter functions\n     * or custom functions that were passed in the constructor.\n     * @param {Object} options\n     */\n\n\n    clipboard_createClass(Clipboard, [{\n        key: 'resolveOptions',\n        value: function resolveOptions() {\n            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n            this.action = typeof options.action === 'function' ? options.action : this.defaultAction;\n            this.target = typeof options.target === 'function' ? options.target : this.defaultTarget;\n            this.text = typeof options.text === 'function' ? options.text : this.defaultText;\n            this.container = clipboard_typeof(options.container) === 'object' ? options.container : document.body;\n        }\n\n        /**\n         * Adds a click event listener to the passed trigger.\n         * @param {String|HTMLElement|HTMLCollection|NodeList} trigger\n         */\n\n    }, {\n        key: 'listenClick',\n        value: function listenClick(trigger) {\n            var _this2 = this;\n\n            this.listener = listen_default()(trigger, 'click', function (e) {\n                return _this2.onClick(e);\n            });\n        }\n\n        /**\n         * Defines a new `ClipboardAction` on each click event.\n         * @param {Event} e\n         */\n\n    }, {\n        key: 'onClick',\n        value: function onClick(e) {\n            var trigger = e.delegateTarget || e.currentTarget;\n\n            if (this.clipboardAction) {\n                this.clipboardAction = null;\n            }\n\n            this.clipboardAction = new clipboard_action({\n                action: this.action(trigger),\n                target: this.target(trigger),\n                text: this.text(trigger),\n                container: this.container,\n                trigger: trigger,\n                emitter: this\n            });\n        }\n\n        /**\n         * Default `action` lookup function.\n         * @param {Element} trigger\n         */\n\n    }, {\n        key: 'defaultAction',\n        value: function defaultAction(trigger) {\n            return getAttributeValue('action', trigger);\n        }\n\n        /**\n         * Default `target` lookup function.\n         * @param {Element} trigger\n         */\n\n    }, {\n        key: 'defaultTarget',\n        value: function defaultTarget(trigger) {\n            var selector = getAttributeValue('target', trigger);\n\n            if (selector) {\n                return document.querySelector(selector);\n            }\n        }\n\n        /**\n         * Returns the support of the given action, or all actions if no action is\n         * given.\n         * @param {String} [action]\n         */\n\n    }, {\n        key: 'defaultText',\n\n\n        /**\n         * Default `text` lookup function.\n         * @param {Element} trigger\n         */\n        value: function defaultText(trigger) {\n            return getAttributeValue('text', trigger);\n        }\n\n        /**\n         * Destroy lifecycle.\n         */\n\n    }, {\n        key: 'destroy',\n        value: function destroy() {\n            this.listener.destroy();\n\n            if (this.clipboardAction) {\n                this.clipboardAction.destroy();\n                this.clipboardAction = null;\n            }\n        }\n    }], [{\n        key: 'isSupported',\n        value: function isSupported() {\n            var action = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : ['copy', 'cut'];\n\n            var actions = typeof action === 'string' ? [action] : action;\n            var support = !!document.queryCommandSupported;\n\n            actions.forEach(function (action) {\n                support = support && !!document.queryCommandSupported(action);\n            });\n\n            return support;\n        }\n    }]);\n\n    return Clipboard;\n}(tiny_emitter_default.a);\n\n/**\n * Helper function to retrieve attribute value.\n * @param {String} suffix\n * @param {Element} element\n */\n\n\nfunction getAttributeValue(suffix, element) {\n    var attribute = 'data-clipboard-' + suffix;\n\n    if (!element.hasAttribute(attribute)) {\n        return;\n    }\n\n    return element.getAttribute(attribute);\n}\n\n/* harmony default export */ var clipboard = __webpack_exports__[\"default\"] = (clipboard_Clipboard);\n\n/***/ })\n/******/ ])[\"default\"];\n});","import { Subject } from './Subject';\nimport { dateTimestampProvider } from './scheduler/dateTimestampProvider';\nexport class ReplaySubject extends Subject {\n    constructor(bufferSize = Infinity, windowTime = Infinity, timestampProvider = dateTimestampProvider) {\n        super();\n        this.bufferSize = bufferSize;\n        this.windowTime = windowTime;\n        this.timestampProvider = timestampProvider;\n        this.buffer = [];\n        this.infiniteTimeWindow = true;\n        this.infiniteTimeWindow = windowTime === Infinity;\n        this.bufferSize = Math.max(1, bufferSize);\n        this.windowTime = Math.max(1, windowTime);\n    }\n    next(value) {\n        const { isStopped, buffer, infiniteTimeWindow, timestampProvider, windowTime } = this;\n        if (!isStopped) {\n            buffer.push(value);\n            !infiniteTimeWindow && buffer.push(timestampProvider.now() + windowTime);\n        }\n        this.trimBuffer();\n        super.next(value);\n    }\n    _subscribe(subscriber) {\n        this._throwIfClosed();\n        this.trimBuffer();\n        const subscription = this._innerSubscribe(subscriber);\n        const { infiniteTimeWindow, buffer } = this;\n        const copy = buffer.slice();\n        for (let i = 0; i < copy.length && !subscriber.closed; i += infiniteTimeWindow ? 1 : 2) {\n            subscriber.next(copy[i]);\n        }\n        this._checkFinalizedStatuses(subscriber);\n        return subscription;\n    }\n    trimBuffer() {\n        const { bufferSize, timestampProvider, buffer, infiniteTimeWindow } = this;\n        const adjustedBufferSize = (infiniteTimeWindow ? 1 : 2) * bufferSize;\n        bufferSize < Infinity && adjustedBufferSize < buffer.length && buffer.splice(0, buffer.length - adjustedBufferSize);\n        if (!infiniteTimeWindow) {\n            const now = timestampProvider.now();\n            let last = 0;\n            for (let i = 1; i < buffer.length && buffer[i] <= now; i += 2) {\n                last = i;\n            }\n            last && buffer.splice(0, last + 1);\n        }\n    }\n}\n//# sourceMappingURL=ReplaySubject.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function mapTo(value) {\n    return operate((source, subscriber) => {\n        source.subscribe(new OperatorSubscriber(subscriber, () => subscriber.next(value)));\n    });\n}\n//# sourceMappingURL=mapTo.js.map","import { Observable } from '../Observable';\nimport { innerFrom } from './from';\nexport function defer(observableFactory) {\n    return new Observable((subscriber) => {\n        innerFrom(observableFactory()).subscribe(subscriber);\n    });\n}\n//# sourceMappingURL=defer.js.map","import { Subject } from '../Subject';\nimport { from } from '../observable/from';\nimport { operate } from '../util/lift';\nexport function share(options) {\n    options = options || {};\n    const { connector = () => new Subject(), resetOnComplete = true, resetOnError = true, resetOnRefCountZero = true } = options;\n    let connection = null;\n    let subject = null;\n    let refCount = 0;\n    let hasCompleted = false;\n    let hasErrored = false;\n    const reset = () => {\n        connection = subject = null;\n        hasCompleted = hasErrored = false;\n    };\n    return operate((source, subscriber) => {\n        refCount++;\n        if (!subject) {\n            subject = connector();\n        }\n        const castSubscription = subject.subscribe(subscriber);\n        if (!connection) {\n            connection = from(source).subscribe({\n                next: (value) => subject.next(value),\n                error: (err) => {\n                    hasErrored = true;\n                    const dest = subject;\n                    if (resetOnError) {\n                        reset();\n                    }\n                    dest.error(err);\n                },\n                complete: () => {\n                    hasCompleted = true;\n                    const dest = subject;\n                    if (resetOnComplete) {\n                        reset();\n                    }\n                    dest.complete();\n                },\n            });\n        }\n        return () => {\n            refCount--;\n            castSubscription.unsubscribe();\n            if (!refCount && resetOnRefCountZero && !hasErrored && !hasCompleted) {\n                const conn = connection;\n                reset();\n                conn === null || conn === void 0 ? void 0 : conn.unsubscribe();\n            }\n        };\n    });\n}\n//# sourceMappingURL=share.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function filter(predicate, thisArg) {\n    return operate((source, subscriber) => {\n        let index = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => predicate.call(thisArg, value, index++) && subscriber.next(value)));\n    });\n}\n//# sourceMappingURL=filter.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function distinctUntilChanged(compare, keySelector) {\n    compare = compare !== null && compare !== void 0 ? compare : defaultCompare;\n    return operate((source, subscriber) => {\n        let prev;\n        let first = true;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            ((first && ((prev = value), 1)) || !compare(prev, (prev = keySelector ? keySelector(value) : value))) &&\n                subscriber.next(value);\n            first = false;\n        }));\n    });\n}\nfunction defaultCompare(a, b) {\n    return a === b;\n}\n//# sourceMappingURL=distinctUntilChanged.js.map","/*!\n * escape-html\n * Copyright(c) 2012-2013 TJ Holowaychuk\n * Copyright(c) 2015 Andreas Lubbe\n * Copyright(c) 2015 Tiancheng \"Timothy\" Gu\n * MIT Licensed\n */\n\n'use strict';\n\n/**\n * Module variables.\n * @private\n */\n\nvar matchHtmlRegExp = /[\"'&<>]/;\n\n/**\n * Module exports.\n * @public\n */\n\nmodule.exports = escapeHtml;\n\n/**\n * Escape special characters in the given string of html.\n *\n * @param  {string} string The string to escape for inserting into HTML\n * @return {string}\n * @public\n */\n\nfunction escapeHtml(string) {\n  var str = '' + string;\n  var match = matchHtmlRegExp.exec(str);\n\n  if (!match) {\n    return str;\n  }\n\n  var escape;\n  var html = '';\n  var index = 0;\n  var lastIndex = 0;\n\n  for (index = match.index; index < str.length; index++) {\n    switch (str.charCodeAt(index)) {\n      case 34: // \"\n        escape = '&quot;';\n        break;\n      case 38: // &\n        escape = '&amp;';\n        break;\n      case 39: // '\n        escape = '&#39;';\n        break;\n      case 60: // <\n        escape = '&lt;';\n        break;\n      case 62: // >\n        escape = '&gt;';\n        break;\n      default:\n        continue;\n    }\n\n    if (lastIndex !== index) {\n      html += str.substring(lastIndex, index);\n    }\n\n    lastIndex = index + 1;\n    html += escape;\n  }\n\n  return lastIndex !== index\n    ? html + str.substring(lastIndex, index)\n    : html;\n}\n","const { isArray } = Array;\nconst { getPrototypeOf, prototype: objectProto, keys: getKeys } = Object;\nexport function argsArgArrayOrObject(args) {\n    if (args.length === 1) {\n        const first = args[0];\n        if (isArray(first)) {\n            return { args: first, keys: null };\n        }\n        if (isPOJO(first)) {\n            const keys = getKeys(first);\n            return {\n                args: keys.map((key) => first[key]),\n                keys,\n            };\n        }\n    }\n    return { args: args, keys: null };\n}\nfunction isPOJO(obj) {\n    return obj && typeof obj === 'object' && getPrototypeOf(obj) === objectProto;\n}\n//# sourceMappingURL=argsArgArrayOrObject.js.map","import { Observable } from '../Observable';\nimport { argsArgArrayOrObject } from '../util/argsArgArrayOrObject';\nimport { Subscriber } from '../Subscriber';\nimport { from } from './from';\nimport { identity } from '../util/identity';\nimport { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';\nimport { popResultSelector, popScheduler } from '../util/args';\nexport function combineLatest(...args) {\n    const scheduler = popScheduler(args);\n    const resultSelector = popResultSelector(args);\n    const { args: observables, keys } = argsArgArrayOrObject(args);\n    if (observables.length === 0) {\n        return from([], scheduler);\n    }\n    const result = new Observable(combineLatestInit(observables, scheduler, keys\n        ?\n            (values) => {\n                const value = {};\n                for (let i = 0; i < values.length; i++) {\n                    value[keys[i]] = values[i];\n                }\n                return value;\n            }\n        :\n            identity));\n    if (resultSelector) {\n        return result.pipe(mapOneOrManyArgs(resultSelector));\n    }\n    return result;\n}\nclass CombineLatestSubscriber extends Subscriber {\n    constructor(destination, _next, shouldComplete) {\n        super(destination);\n        this._next = _next;\n        this.shouldComplete = shouldComplete;\n    }\n    _complete() {\n        if (this.shouldComplete()) {\n            super._complete();\n        }\n        else {\n            this.unsubscribe();\n        }\n    }\n}\nexport function combineLatestInit(observables, scheduler, valueTransform = identity) {\n    return (subscriber) => {\n        const primarySubscribe = () => {\n            const { length } = observables;\n            const values = new Array(length);\n            let active = length;\n            const hasValues = observables.map(() => false);\n            let waitingForFirstValues = true;\n            const emit = () => subscriber.next(valueTransform(values.slice()));\n            for (let i = 0; i < length; i++) {\n                const subscribe = () => {\n                    const source = from(observables[i], scheduler);\n                    source.subscribe(new CombineLatestSubscriber(subscriber, (value) => {\n                        values[i] = value;\n                        if (waitingForFirstValues) {\n                            hasValues[i] = true;\n                            waitingForFirstValues = !hasValues.every(identity);\n                        }\n                        if (!waitingForFirstValues) {\n                            emit();\n                        }\n                    }, () => --active === 0));\n                };\n                maybeSchedule(scheduler, subscribe, subscriber);\n            }\n        };\n        maybeSchedule(scheduler, primarySubscribe, subscriber);\n    };\n}\nfunction maybeSchedule(scheduler, execute, subscription) {\n    if (scheduler) {\n        subscription.add(scheduler.schedule(execute));\n    }\n    else {\n        execute();\n    }\n}\n//# sourceMappingURL=combineLatest.js.map","(function (global, factory) {\n  typeof exports === 'object' && typeof module !== 'undefined' ? factory() :\n  typeof define === 'function' && define.amd ? define(factory) :\n  (factory());\n}(this, (function () { 'use strict';\n\n  /**\n   * Applies the :focus-visible polyfill at the given scope.\n   * A scope in this case is either the top-level Document or a Shadow Root.\n   *\n   * @param {(Document|ShadowRoot)} scope\n   * @see https://github.com/WICG/focus-visible\n   */\n  function applyFocusVisiblePolyfill(scope) {\n    var hadKeyboardEvent = true;\n    var hadFocusVisibleRecently = false;\n    var hadFocusVisibleRecentlyTimeout = null;\n\n    var inputTypesAllowlist = {\n      text: true,\n      search: true,\n      url: true,\n      tel: true,\n      email: true,\n      password: true,\n      number: true,\n      date: true,\n      month: true,\n      week: true,\n      time: true,\n      datetime: true,\n      'datetime-local': true\n    };\n\n    /**\n     * Helper function for legacy browsers and iframes which sometimes focus\n     * elements like document, body, and non-interactive SVG.\n     * @param {Element} el\n     */\n    function isValidFocusTarget(el) {\n      if (\n        el &&\n        el !== document &&\n        el.nodeName !== 'HTML' &&\n        el.nodeName !== 'BODY' &&\n        'classList' in el &&\n        'contains' in el.classList\n      ) {\n        return true;\n      }\n      return false;\n    }\n\n    /**\n     * Computes whether the given element should automatically trigger the\n     * `focus-visible` class being added, i.e. whether it should always match\n     * `:focus-visible` when focused.\n     * @param {Element} el\n     * @return {boolean}\n     */\n    function focusTriggersKeyboardModality(el) {\n      var type = el.type;\n      var tagName = el.tagName;\n\n      if (tagName === 'INPUT' && inputTypesAllowlist[type] && !el.readOnly) {\n        return true;\n      }\n\n      if (tagName === 'TEXTAREA' && !el.readOnly) {\n        return true;\n      }\n\n      if (el.isContentEditable) {\n        return true;\n      }\n\n      return false;\n    }\n\n    /**\n     * Add the `focus-visible` class to the given element if it was not added by\n     * the author.\n     * @param {Element} el\n     */\n    function addFocusVisibleClass(el) {\n      if (el.classList.contains('focus-visible')) {\n        return;\n      }\n      el.classList.add('focus-visible');\n      el.setAttribute('data-focus-visible-added', '');\n    }\n\n    /**\n     * Remove the `focus-visible` class from the given element if it was not\n     * originally added by the author.\n     * @param {Element} el\n     */\n    function removeFocusVisibleClass(el) {\n      if (!el.hasAttribute('data-focus-visible-added')) {\n        return;\n      }\n      el.classList.remove('focus-visible');\n      el.removeAttribute('data-focus-visible-added');\n    }\n\n    /**\n     * If the most recent user interaction was via the keyboard;\n     * and the key press did not include a meta, alt/option, or control key;\n     * then the modality is keyboard. Otherwise, the modality is not keyboard.\n     * Apply `focus-visible` to any current active element and keep track\n     * of our keyboard modality state with `hadKeyboardEvent`.\n     * @param {KeyboardEvent} e\n     */\n    function onKeyDown(e) {\n      if (e.metaKey || e.altKey || e.ctrlKey) {\n        return;\n      }\n\n      if (isValidFocusTarget(scope.activeElement)) {\n        addFocusVisibleClass(scope.activeElement);\n      }\n\n      hadKeyboardEvent = true;\n    }\n\n    /**\n     * If at any point a user clicks with a pointing device, ensure that we change\n     * the modality away from keyboard.\n     * This avoids the situation where a user presses a key on an already focused\n     * element, and then clicks on a different element, focusing it with a\n     * pointing device, while we still think we're in keyboard modality.\n     * @param {Event} e\n     */\n    function onPointerDown(e) {\n      hadKeyboardEvent = false;\n    }\n\n    /**\n     * On `focus`, add the `focus-visible` class to the target if:\n     * - the target received focus as a result of keyboard navigation, or\n     * - the event target is an element that will likely require interaction\n     *   via the keyboard (e.g. a text box)\n     * @param {Event} e\n     */\n    function onFocus(e) {\n      // Prevent IE from focusing the document or HTML element.\n      if (!isValidFocusTarget(e.target)) {\n        return;\n      }\n\n      if (hadKeyboardEvent || focusTriggersKeyboardModality(e.target)) {\n        addFocusVisibleClass(e.target);\n      }\n    }\n\n    /**\n     * On `blur`, remove the `focus-visible` class from the target.\n     * @param {Event} e\n     */\n    function onBlur(e) {\n      if (!isValidFocusTarget(e.target)) {\n        return;\n      }\n\n      if (\n        e.target.classList.contains('focus-visible') ||\n        e.target.hasAttribute('data-focus-visible-added')\n      ) {\n        // To detect a tab/window switch, we look for a blur event followed\n        // rapidly by a visibility change.\n        // If we don't see a visibility change within 100ms, it's probably a\n        // regular focus change.\n        hadFocusVisibleRecently = true;\n        window.clearTimeout(hadFocusVisibleRecentlyTimeout);\n        hadFocusVisibleRecentlyTimeout = window.setTimeout(function() {\n          hadFocusVisibleRecently = false;\n        }, 100);\n        removeFocusVisibleClass(e.target);\n      }\n    }\n\n    /**\n     * If the user changes tabs, keep track of whether or not the previously\n     * focused element had .focus-visible.\n     * @param {Event} e\n     */\n    function onVisibilityChange(e) {\n      if (document.visibilityState === 'hidden') {\n        // If the tab becomes active again, the browser will handle calling focus\n        // on the element (Safari actually calls it twice).\n        // If this tab change caused a blur on an element with focus-visible,\n        // re-apply the class when the user switches back to the tab.\n        if (hadFocusVisibleRecently) {\n          hadKeyboardEvent = true;\n        }\n        addInitialPointerMoveListeners();\n      }\n    }\n\n    /**\n     * Add a group of listeners to detect usage of any pointing devices.\n     * These listeners will be added when the polyfill first loads, and anytime\n     * the window is blurred, so that they are active when the window regains\n     * focus.\n     */\n    function addInitialPointerMoveListeners() {\n      document.addEventListener('mousemove', onInitialPointerMove);\n      document.addEventListener('mousedown', onInitialPointerMove);\n      document.addEventListener('mouseup', onInitialPointerMove);\n      document.addEventListener('pointermove', onInitialPointerMove);\n      document.addEventListener('pointerdown', onInitialPointerMove);\n      document.addEventListener('pointerup', onInitialPointerMove);\n      document.addEventListener('touchmove', onInitialPointerMove);\n      document.addEventListener('touchstart', onInitialPointerMove);\n      document.addEventListener('touchend', onInitialPointerMove);\n    }\n\n    function removeInitialPointerMoveListeners() {\n      document.removeEventListener('mousemove', onInitialPointerMove);\n      document.removeEventListener('mousedown', onInitialPointerMove);\n      document.removeEventListener('mouseup', onInitialPointerMove);\n      document.removeEventListener('pointermove', onInitialPointerMove);\n      document.removeEventListener('pointerdown', onInitialPointerMove);\n      document.removeEventListener('pointerup', onInitialPointerMove);\n      document.removeEventListener('touchmove', onInitialPointerMove);\n      document.removeEventListener('touchstart', onInitialPointerMove);\n      document.removeEventListener('touchend', onInitialPointerMove);\n    }\n\n    /**\n     * When the polfyill first loads, assume the user is in keyboard modality.\n     * If any event is received from a pointing device (e.g. mouse, pointer,\n     * touch), turn off keyboard modality.\n     * This accounts for situations where focus enters the page from the URL bar.\n     * @param {Event} e\n     */\n    function onInitialPointerMove(e) {\n      // Work around a Safari quirk that fires a mousemove on <html> whenever the\n      // window blurs, even if you're tabbing out of the page. ¯\\_(ツ)_/¯\n      if (e.target.nodeName && e.target.nodeName.toLowerCase() === 'html') {\n        return;\n      }\n\n      hadKeyboardEvent = false;\n      removeInitialPointerMoveListeners();\n    }\n\n    // For some kinds of state, we are interested in changes at the global scope\n    // only. For example, global pointer input, global key presses and global\n    // visibility change should affect the state at every scope:\n    document.addEventListener('keydown', onKeyDown, true);\n    document.addEventListener('mousedown', onPointerDown, true);\n    document.addEventListener('pointerdown', onPointerDown, true);\n    document.addEventListener('touchstart', onPointerDown, true);\n    document.addEventListener('visibilitychange', onVisibilityChange, true);\n\n    addInitialPointerMoveListeners();\n\n    // For focus and blur, we specifically care about state changes in the local\n    // scope. This is because focus / blur events that originate from within a\n    // shadow root are not re-dispatched from the host element if it was already\n    // the active element in its own scope:\n    scope.addEventListener('focus', onFocus, true);\n    scope.addEventListener('blur', onBlur, true);\n\n    // We detect that a node is a ShadowRoot by ensuring that it is a\n    // DocumentFragment and also has a host property. This check covers native\n    // implementation and polyfill implementation transparently. If we only cared\n    // about the native implementation, we could just check if the scope was\n    // an instance of a ShadowRoot.\n    if (scope.nodeType === Node.DOCUMENT_FRAGMENT_NODE && scope.host) {\n      // Since a ShadowRoot is a special kind of DocumentFragment, it does not\n      // have a root element to add a class to. So, we add this attribute to the\n      // host element instead:\n      scope.host.setAttribute('data-js-focus-visible', '');\n    } else if (scope.nodeType === Node.DOCUMENT_NODE) {\n      document.documentElement.classList.add('js-focus-visible');\n      document.documentElement.setAttribute('data-js-focus-visible', '');\n    }\n  }\n\n  // It is important to wrap all references to global window and document in\n  // these checks to support server-side rendering use cases\n  // @see https://github.com/WICG/focus-visible/issues/199\n  if (typeof window !== 'undefined' && typeof document !== 'undefined') {\n    // Make the polyfill helper globally available. This can be used as a signal\n    // to interested libraries that wish to coordinate with the polyfill for e.g.,\n    // applying the polyfill to a shadow root:\n    window.applyFocusVisiblePolyfill = applyFocusVisiblePolyfill;\n\n    // Notify interested libraries of the polyfill's presence, in case the\n    // polyfill was loaded lazily:\n    var event;\n\n    try {\n      event = new CustomEvent('focus-visible-polyfill-ready');\n    } catch (error) {\n      // IE11 does not support using CustomEvent as a constructor directly:\n      event = document.createEvent('CustomEvent');\n      event.initCustomEvent('focus-visible-polyfill-ready', false, false, {});\n    }\n\n    window.dispatchEvent(event);\n  }\n\n  if (typeof document !== 'undefined') {\n    // Apply the polyfill to the global document, so that no JavaScript\n    // coordination is required to use the polyfill in the top-level document:\n    applyFocusVisiblePolyfill(document);\n  }\n\n})));\n","import { Observable } from '../Observable';\nimport { mergeMap } from '../operators/mergeMap';\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isFunction } from '../util/isFunction';\nimport { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';\nimport { internalFromArray } from './fromArray';\nconst nodeEventEmitterMethods = ['addListener', 'removeListener'];\nconst eventTargetMethods = ['addEventListener', 'removeEventListener'];\nconst jqueryMethods = ['on', 'off'];\nexport function fromEvent(target, eventName, options, resultSelector) {\n    if (isFunction(options)) {\n        resultSelector = options;\n        options = undefined;\n    }\n    if (resultSelector) {\n        return fromEvent(target, eventName, options).pipe(mapOneOrManyArgs(resultSelector));\n    }\n    const [add, remove] = isEventTarget(target)\n        ? eventTargetMethods.map((methodName) => (handler) => target[methodName](eventName, handler, options))\n        :\n            isNodeStyleEventEmitter(target)\n                ? nodeEventEmitterMethods.map(toCommonHandlerRegistry(target, eventName))\n                : isJQueryStyleEventEmitter(target)\n                    ? jqueryMethods.map(toCommonHandlerRegistry(target, eventName))\n                    : [];\n    if (!add) {\n        if (isArrayLike(target)) {\n            return mergeMap((subTarget) => fromEvent(subTarget, eventName, options))(internalFromArray(target));\n        }\n    }\n    return new Observable((subscriber) => {\n        if (!add) {\n            throw new TypeError('Invalid event target');\n        }\n        const handler = (...args) => subscriber.next(1 < args.length ? args : args[0]);\n        add(handler);\n        return () => remove(handler);\n    });\n}\nfunction toCommonHandlerRegistry(target, eventName) {\n    return (methodName) => (handler) => target[methodName](eventName, handler);\n}\nfunction isNodeStyleEventEmitter(target) {\n    return isFunction(target.addListener) && isFunction(target.removeListener);\n}\nfunction isJQueryStyleEventEmitter(target) {\n    return isFunction(target.on) && isFunction(target.off);\n}\nfunction isEventTarget(target) {\n    return isFunction(target.addEventListener) && isFunction(target.removeEventListener);\n}\n//# sourceMappingURL=fromEvent.js.map","import { mergeAll } from '../operators/mergeAll';\nimport { internalFromArray } from './fromArray';\nimport { argsOrArgArray } from '../util/argsOrArgArray';\nimport { innerFrom } from './from';\nimport { EMPTY } from './empty';\nimport { popNumber, popScheduler } from '../util/args';\nexport function merge(...args) {\n    const scheduler = popScheduler(args);\n    const concurrent = popNumber(args, Infinity);\n    const sources = argsOrArgArray(args);\n    return !sources.length\n        ?\n            EMPTY\n        : sources.length === 1\n            ?\n                innerFrom(sources[0])\n            :\n                mergeAll(concurrent)(internalFromArray(sources, scheduler));\n}\n//# sourceMappingURL=merge.js.map","import { concat } from '../observable/concat';\nimport { popScheduler } from '../util/args';\nimport { operate } from '../util/lift';\nexport function startWith(...values) {\n    const scheduler = popScheduler(values);\n    return operate((source, subscriber) => {\n        (scheduler ? concat(values, source, scheduler) : concat(values, source)).subscribe(subscriber);\n    });\n}\n//# sourceMappingURL=startWith.js.map","import { internalFromArray } from './fromArray';\nimport { scheduleArray } from '../scheduled/scheduleArray';\nimport { popScheduler } from '../util/args';\nexport function of(...args) {\n    const scheduler = popScheduler(args);\n    return scheduler ? scheduleArray(args, scheduler) : internalFromArray(args);\n}\n//# sourceMappingURL=of.js.map","import { Observable } from '../Observable';\nimport { noop } from '../util/noop';\nexport const NEVER = new Observable(noop);\nexport function never() {\n    return NEVER;\n}\n//# sourceMappingURL=never.js.map","import { operate } from '../util/lift';\nexport function finalize(callback) {\n    return operate((source, subscriber) => {\n        source.subscribe(subscriber);\n        subscriber.add(callback);\n    });\n}\n//# sourceMappingURL=finalize.js.map","import { ReplaySubject } from '../ReplaySubject';\nimport { share } from './share';\nexport function shareReplay(configOrBufferSize, windowTime, scheduler) {\n    var _a, _b;\n    let bufferSize;\n    let refCount = false;\n    if (configOrBufferSize && typeof configOrBufferSize === 'object') {\n        bufferSize = (_a = configOrBufferSize.bufferSize) !== null && _a !== void 0 ? _a : Infinity;\n        windowTime = (_b = configOrBufferSize.windowTime) !== null && _b !== void 0 ? _b : Infinity;\n        refCount = !!configOrBufferSize.refCount;\n        scheduler = configOrBufferSize.scheduler;\n    }\n    else {\n        bufferSize = configOrBufferSize !== null && configOrBufferSize !== void 0 ? configOrBufferSize : Infinity;\n    }\n    return share({\n        connector: () => new ReplaySubject(bufferSize, windowTime, scheduler),\n        resetOnError: true,\n        resetOnComplete: false,\n        resetOnRefCountZero: refCount\n    });\n}\n//# sourceMappingURL=shareReplay.js.map","import { isFunction } from '../util/isFunction';\nimport { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { identity } from '../util/identity';\nexport function tap(observerOrNext, error, complete) {\n    const tapObserver = isFunction(observerOrNext) || error || complete ? { next: observerOrNext, error, complete } : observerOrNext;\n    return tapObserver\n        ? operate((source, subscriber) => {\n            source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n                var _a;\n                (_a = tapObserver.next) === null || _a === void 0 ? void 0 : _a.call(tapObserver, value);\n                subscriber.next(value);\n            }, (err) => {\n                var _a;\n                (_a = tapObserver.error) === null || _a === void 0 ? void 0 : _a.call(tapObserver, err);\n                subscriber.error(err);\n            }, () => {\n                var _a;\n                (_a = tapObserver.complete) === null || _a === void 0 ? void 0 : _a.call(tapObserver);\n                subscriber.complete();\n            }));\n        })\n        :\n            identity;\n}\n//# sourceMappingURL=tap.js.map","import { Subject } from './Subject';\nexport class BehaviorSubject extends Subject {\n    constructor(_value) {\n        super();\n        this._value = _value;\n    }\n    get value() {\n        return this.getValue();\n    }\n    _subscribe(subscriber) {\n        const subscription = super._subscribe(subscriber);\n        !subscription.closed && subscriber.next(this._value);\n        return subscription;\n    }\n    getValue() {\n        const { hasError, thrownError, _value } = this;\n        if (hasError) {\n            throw thrownError;\n        }\n        this._throwIfClosed();\n        return _value;\n    }\n    next(value) {\n        super.next((this._value = value));\n    }\n}\n//# sourceMappingURL=BehaviorSubject.js.map","import { distinctUntilChanged } from './distinctUntilChanged';\nexport function distinctUntilKeyChanged(key, compare) {\n    return distinctUntilChanged((x, y) => compare ? compare(x[key], y[key]) : x[key] === y[key]);\n}\n//# sourceMappingURL=distinctUntilKeyChanged.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nexport const defaultThrottleConfig = {\n    leading: true,\n    trailing: false,\n};\nexport function throttle(durationSelector, { leading, trailing } = defaultThrottleConfig) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        let sendValue = null;\n        let throttled = null;\n        let isComplete = false;\n        const endThrottling = () => {\n            throttled === null || throttled === void 0 ? void 0 : throttled.unsubscribe();\n            throttled = null;\n            if (trailing) {\n                send();\n                isComplete && subscriber.complete();\n            }\n        };\n        const cleanupThrottling = () => {\n            throttled = null;\n            isComplete && subscriber.complete();\n        };\n        const startThrottle = (value) => (throttled = innerFrom(durationSelector(value)).subscribe(new OperatorSubscriber(subscriber, endThrottling, undefined, cleanupThrottling)));\n        const send = () => {\n            if (hasValue) {\n                subscriber.next(sendValue);\n                !isComplete && startThrottle(sendValue);\n            }\n            hasValue = false;\n            sendValue = null;\n        };\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            hasValue = true;\n            sendValue = value;\n            !(throttled && !throttled.closed) && (leading ? send() : startThrottle(value));\n        }, undefined, () => {\n            isComplete = true;\n            !(trailing && hasValue && throttled && !throttled.closed) && subscriber.complete();\n        }));\n    });\n}\n//# sourceMappingURL=throttle.js.map","import { switchMap } from './switchMap';\nexport function switchMapTo(innerObservable, resultSelector) {\n    return resultSelector ? switchMap(() => innerObservable, resultSelector) : switchMap(() => innerObservable);\n}\n//# sourceMappingURL=switchMapTo.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function observeOn(scheduler, delay = 0) {\n    return operate((source, subscriber) => {\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => subscriber.add(scheduler.schedule(() => subscriber.next(value), delay)), (err) => subscriber.add(scheduler.schedule(() => subscriber.error(err), delay)), () => subscriber.add(scheduler.schedule(() => subscriber.complete(), delay))));\n    });\n}\n//# sourceMappingURL=observeOn.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nimport { identity } from '../util/identity';\nimport { noop } from '../util/noop';\nimport { popResultSelector } from '../util/args';\nexport function withLatestFrom(...inputs) {\n    const project = popResultSelector(inputs);\n    return operate((source, subscriber) => {\n        const len = inputs.length;\n        const otherValues = new Array(len);\n        let hasValue = inputs.map(() => false);\n        let ready = false;\n        for (let i = 0; i < len; i++) {\n            innerFrom(inputs[i]).subscribe(new OperatorSubscriber(subscriber, (value) => {\n                otherValues[i] = value;\n                if (!ready && !hasValue[i]) {\n                    hasValue[i] = true;\n                    (ready = hasValue.every(identity)) && (hasValue = null);\n                }\n            }, undefined, noop));\n        }\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            if (ready) {\n                const values = [value, ...otherValues];\n                subscriber.next(project ? project(...values) : values);\n            }\n        }));\n    });\n}\n//# sourceMappingURL=withLatestFrom.js.map","import { operate } from '../util/lift';\nimport { noop } from '../util/noop';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function sample(notifier) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        let lastValue = null;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            hasValue = true;\n            lastValue = value;\n        }));\n        const emit = () => {\n            if (hasValue) {\n                hasValue = false;\n                const value = lastValue;\n                lastValue = null;\n                subscriber.next(value);\n            }\n        };\n        notifier.subscribe(new OperatorSubscriber(subscriber, emit, undefined, noop));\n    });\n}\n//# sourceMappingURL=sample.js.map","import { filter } from './filter';\nexport function skip(count) {\n    return filter((_, index) => count <= index);\n}\n//# sourceMappingURL=skip.js.map","import { innerFrom } from '../observable/from';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { operate } from '../util/lift';\nexport function catchError(selector) {\n    return operate((source, subscriber) => {\n        let innerSub = null;\n        let syncUnsub = false;\n        let handledResult;\n        innerSub = source.subscribe(new OperatorSubscriber(subscriber, undefined, (err) => {\n            handledResult = innerFrom(selector(err, catchError(selector)(source)));\n            if (innerSub) {\n                innerSub.unsubscribe();\n                innerSub = null;\n                handledResult.subscribe(subscriber);\n            }\n            else {\n                syncUnsub = true;\n            }\n        }));\n        if (syncUnsub) {\n            innerSub.unsubscribe();\n            innerSub = null;\n            handledResult.subscribe(subscriber);\n        }\n    });\n}\n//# sourceMappingURL=catchError.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nimport { noop } from '../util/noop';\nexport function skipUntil(notifier) {\n    return operate((source, subscriber) => {\n        let taking = false;\n        const skipSubscriber = new OperatorSubscriber(subscriber, () => {\n            skipSubscriber === null || skipSubscriber === void 0 ? void 0 : skipSubscriber.unsubscribe();\n            taking = true;\n        }, undefined, noop);\n        innerFrom(notifier).subscribe(skipSubscriber);\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => taking && subscriber.next(value)));\n    });\n}\n//# sourceMappingURL=skipUntil.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { arrRemove } from '../util/arrRemove';\nexport function bufferCount(bufferSize, startBufferEvery = null) {\n    startBufferEvery = startBufferEvery !== null && startBufferEvery !== void 0 ? startBufferEvery : bufferSize;\n    return operate((source, subscriber) => {\n        let buffers = [];\n        let count = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            let toEmit = null;\n            if (count++ % startBufferEvery === 0) {\n                buffers.push([]);\n            }\n            for (const buffer of buffers) {\n                buffer.push(value);\n                if (bufferSize <= buffer.length) {\n                    toEmit = toEmit !== null && toEmit !== void 0 ? toEmit : [];\n                    toEmit.push(buffer);\n                }\n            }\n            if (toEmit) {\n                for (const buffer of toEmit) {\n                    arrRemove(buffers, buffer);\n                    subscriber.next(buffer);\n                }\n            }\n        }, undefined, () => {\n            for (const buffer of buffers) {\n                subscriber.next(buffer);\n            }\n            subscriber.complete();\n        }, () => {\n            buffers = null;\n        }));\n    });\n}\n//# sourceMappingURL=bufferCount.js.map","import { mergeMap } from './mergeMap';\nimport { isFunction } from '../util/isFunction';\nexport function concatMap(project, resultSelector) {\n    return isFunction(resultSelector) ? mergeMap(project, resultSelector, 1) : mergeMap(project, 1);\n}\n//# sourceMappingURL=concatMap.js.map","import { defer } from './defer';\nexport function iif(condition, trueResult, falseResult) {\n    return defer(() => (condition() ? trueResult : falseResult));\n}\n//# sourceMappingURL=iif.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function defaultIfEmpty(defaultValue = null) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            hasValue = true;\n            subscriber.next(value);\n        }, undefined, () => {\n            if (!hasValue) {\n                subscriber.next(defaultValue);\n            }\n            subscriber.complete();\n        }));\n    });\n}\n//# sourceMappingURL=defaultIfEmpty.js.map","import { combineLatestInit } from '../observable/combineLatest';\nimport { operate } from '../util/lift';\nimport { argsOrArgArray } from '../util/argsOrArgArray';\nimport { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';\nimport { pipe } from '../util/pipe';\nimport { popResultSelector } from '../util/args';\nexport function combineLatest(...args) {\n    const resultSelector = popResultSelector(args);\n    return resultSelector\n        ? pipe(combineLatest(...args), mapOneOrManyArgs(resultSelector))\n        : operate((source, subscriber) => {\n            combineLatestInit([source, ...argsOrArgArray(args)])(subscriber);\n        });\n}\nexport function combineLatestWith(...otherSources) {\n    return combineLatest(...otherSources);\n}\n//# sourceMappingURL=combineLatestWith.js.map","import { Subscription } from '../Subscription';\nexport const animationFrameProvider = {\n    schedule(callback) {\n        let request = requestAnimationFrame;\n        let cancel = cancelAnimationFrame;\n        const { delegate } = animationFrameProvider;\n        if (delegate) {\n            request = delegate.requestAnimationFrame;\n            cancel = delegate.cancelAnimationFrame;\n        }\n        const handle = request((timestamp) => {\n            cancel = undefined;\n            callback(timestamp);\n        });\n        return new Subscription(() => cancel === null || cancel === void 0 ? void 0 : cancel(handle));\n    },\n    requestAnimationFrame(...args) {\n        const { delegate } = animationFrameProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.requestAnimationFrame) || requestAnimationFrame)(...args);\n    },\n    cancelAnimationFrame(...args) {\n        const { delegate } = animationFrameProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.cancelAnimationFrame) || cancelAnimationFrame)(...args);\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=animationFrameProvider.js.map","import { AsyncAction } from './AsyncAction';\nimport { animationFrameProvider } from './animationFrameProvider';\nexport class AnimationFrameAction extends AsyncAction {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        if (delay !== null && delay > 0) {\n            return super.requestAsyncId(scheduler, id, delay);\n        }\n        scheduler.actions.push(this);\n        return scheduler.scheduled || (scheduler.scheduled = animationFrameProvider.requestAnimationFrame(() => scheduler.flush(undefined)));\n    }\n    recycleAsyncId(scheduler, id, delay = 0) {\n        if ((delay != null && delay > 0) || (delay == null && this.delay > 0)) {\n            return super.recycleAsyncId(scheduler, id, delay);\n        }\n        if (scheduler.actions.length === 0) {\n            animationFrameProvider.cancelAnimationFrame(id);\n            scheduler.scheduled = undefined;\n        }\n        return undefined;\n    }\n}\n//# sourceMappingURL=AnimationFrameAction.js.map","import { AsyncScheduler } from './AsyncScheduler';\nexport class AnimationFrameScheduler extends AsyncScheduler {\n    flush(action) {\n        this.active = true;\n        this.scheduled = undefined;\n        const { actions } = this;\n        let error;\n        let index = -1;\n        action = action || actions.shift();\n        const count = actions.length;\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (++index < count && (action = actions.shift()));\n        this.active = false;\n        if (error) {\n            while (++index < count && (action = actions.shift())) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AnimationFrameScheduler.js.map","import { AnimationFrameAction } from './AnimationFrameAction';\nimport { AnimationFrameScheduler } from './AnimationFrameScheduler';\nexport const animationFrameScheduler = new AnimationFrameScheduler(AnimationFrameAction);\nexport const animationFrame = animationFrameScheduler;\n//# sourceMappingURL=animationFrame.js.map","import { concat } from '../observable/concat';\nimport { take } from './take';\nimport { ignoreElements } from './ignoreElements';\nimport { mapTo } from './mapTo';\nimport { mergeMap } from './mergeMap';\nexport function delayWhen(delayDurationSelector, subscriptionDelay) {\n    if (subscriptionDelay) {\n        return (source) => concat(subscriptionDelay.pipe(take(1), ignoreElements()), source.pipe(delayWhen(delayDurationSelector)));\n    }\n    return mergeMap((value, index) => delayDurationSelector(value, index).pipe(take(1), mapTo(value)));\n}\n//# sourceMappingURL=delayWhen.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { noop } from '../util/noop';\nexport function ignoreElements() {\n    return operate((source, subscriber) => {\n        source.subscribe(new OperatorSubscriber(subscriber, noop));\n    });\n}\n//# sourceMappingURL=ignoreElements.js.map","import { asyncScheduler } from '../scheduler/async';\nimport { delayWhen } from './delayWhen';\nimport { timer } from '../observable/timer';\nexport function delay(due, scheduler = asyncScheduler) {\n    const duration = timer(due, scheduler);\n    return delayWhen(() => duration);\n}\n//# sourceMappingURL=delay.js.map","import { OperatorSubscriber } from './OperatorSubscriber';\nexport function scanInternals(accumulator, seed, hasSeed, emitOnNext, emitBeforeComplete) {\n    return (source, subscriber) => {\n        let hasState = hasSeed;\n        let state = seed;\n        let index = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            const i = index++;\n            state = hasState\n                ?\n                    accumulator(state, value, i)\n                :\n                    ((hasState = true), value);\n            emitOnNext && subscriber.next(state);\n        }, undefined, emitBeforeComplete &&\n            (() => {\n                hasState && subscriber.next(state);\n                subscriber.complete();\n            })));\n    };\n}\n//# sourceMappingURL=scanInternals.js.map","import { operate } from '../util/lift';\nimport { scanInternals } from './scanInternals';\nexport function scan(accumulator, seed) {\n    return operate(scanInternals(accumulator, seed, arguments.length >= 2, true));\n}\n//# sourceMappingURL=scan.js.map","import { zip as zipStatic } from '../observable/zip';\nimport { operate } from '../util/lift';\nexport function zip(...sources) {\n    return operate((source, subscriber) => {\n        zipStatic(source, ...sources).subscribe(subscriber);\n    });\n}\nexport function zipWith(...otherInputs) {\n    return zip(...otherInputs);\n}\n//# sourceMappingURL=zipWith.js.map","import { Observable } from '../Observable';\nimport { innerFrom } from './from';\nimport { argsOrArgArray } from '../util/argsOrArgArray';\nimport { EMPTY } from './empty';\nimport { OperatorSubscriber } from '../operators/OperatorSubscriber';\nimport { popResultSelector } from '../util/args';\nexport function zip(...args) {\n    const resultSelector = popResultSelector(args);\n    const sources = argsOrArgArray(args);\n    return sources.length\n        ? new Observable((subscriber) => {\n            let buffers = sources.map(() => []);\n            let completed = sources.map(() => false);\n            subscriber.add(() => {\n                buffers = completed = null;\n            });\n            for (let sourceIndex = 0; !subscriber.closed && sourceIndex < sources.length; sourceIndex++) {\n                innerFrom(sources[sourceIndex]).subscribe(new OperatorSubscriber(subscriber, (value) => {\n                    buffers[sourceIndex].push(value);\n                    if (buffers.every((buffer) => buffer.length)) {\n                        const result = buffers.map((buffer) => buffer.shift());\n                        subscriber.next(resultSelector ? resultSelector(...result) : result);\n                        if (buffers.some((buffer, i) => !buffer.length && completed[i])) {\n                            subscriber.complete();\n                        }\n                    }\n                }, undefined, () => {\n                    completed[sourceIndex] = true;\n                    !buffers[sourceIndex].length && subscriber.complete();\n                }));\n            }\n            return () => {\n                buffers = completed = null;\n            };\n        })\n        : EMPTY;\n}\n//# sourceMappingURL=zip.js.map","import { asyncScheduler } from '../scheduler/async';\nimport { debounce } from './debounce';\nimport { timer } from '../observable/timer';\nexport function debounceTime(dueTime, scheduler = asyncScheduler) {\n    const duration = timer(dueTime, scheduler);\n    return debounce(() => duration);\n}\n//# sourceMappingURL=debounceTime.js.map","import { operate } from '../util/lift';\nimport { noop } from '../util/noop';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nexport function debounce(durationSelector) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        let lastValue = null;\n        let durationSubscriber = null;\n        const emit = () => {\n            durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();\n            durationSubscriber = null;\n            if (hasValue) {\n                hasValue = false;\n                const value = lastValue;\n                lastValue = null;\n                subscriber.next(value);\n            }\n        };\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();\n            hasValue = true;\n            lastValue = value;\n            durationSubscriber = new OperatorSubscriber(subscriber, emit, undefined, noop);\n            innerFrom(durationSelector(value)).subscribe(durationSubscriber);\n        }, undefined, () => {\n            emit();\n            subscriber.complete();\n        }, () => {\n            lastValue = durationSubscriber = null;\n        }));\n    });\n}\n//# sourceMappingURL=debounce.js.map"],"sourceRoot":""}
\ No newline at end of file
diff --git a/assets/javascripts/vendor.53cc9318.min.js.map b/assets/javascripts/vendor.53cc9318.min.js.map
deleted file mode 100644
index 1fbd5e4d..00000000
--- a/assets/javascripts/vendor.53cc9318.min.js.map
+++ /dev/null
@@ -1 +0,0 @@
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{ isFunction } from './isFunction';\nexport function hasLift(source) {\n    return isFunction(source === null || source === void 0 ? void 0 : source.lift);\n}\nexport function operate(init) {\n    return (source) => {\n        if (hasLift(source)) {\n            return source.lift(function (liftedSource) {\n                try {\n                    return init(liftedSource, this);\n                }\n                catch (err) {\n                    this.error(err);\n                }\n            });\n        }\n        throw new TypeError('Unable to lift unknown Observable type');\n    };\n}\n//# sourceMappingURL=lift.js.map","export function isFunction(value) {\n    return typeof value === 'function';\n}\n//# sourceMappingURL=isFunction.js.map","import { Subscriber } from '../Subscriber';\nexport class OperatorSubscriber extends Subscriber {\n    constructor(destination, onNext, onError, onComplete, onUnsubscribe) {\n        super(destination);\n        this.onUnsubscribe = onUnsubscribe;\n        this._next = onNext\n            ? function (value) {\n                try {\n                    onNext(value);\n                }\n                catch (err) {\n                    this.destination.error(err);\n                }\n            }\n            : super._next;\n        this._error = onError\n            ? function (err) {\n                try {\n                    onError(err);\n                }\n                catch (err) {\n                    this.destination.error(err);\n                }\n                this.unsubscribe();\n            }\n            : super._error;\n        this._complete = onComplete\n            ? function () {\n                try {\n                    onComplete();\n                }\n                catch (err) {\n                    this.destination.error(err);\n                }\n                this.unsubscribe();\n            }\n            : super._complete;\n    }\n    unsubscribe() {\n        var _a;\n        !this.closed && ((_a = this.onUnsubscribe) === null || _a === void 0 ? void 0 : _a.call(this));\n        super.unsubscribe();\n    }\n}\n//# sourceMappingURL=OperatorSubscriber.js.map","import { SafeSubscriber, Subscriber } from './Subscriber';\nimport { isSubscription } from './Subscription';\nimport { observable as Symbol_observable } from './symbol/observable';\nimport { pipeFromArray } from './util/pipe';\nimport { config } from './config';\nimport { isFunction } from './util/isFunction';\nexport class Observable {\n    constructor(subscribe) {\n        if (subscribe) {\n            this._subscribe = subscribe;\n        }\n    }\n    lift(operator) {\n        const observable = new Observable();\n        observable.source = this;\n        observable.operator = operator;\n        return observable;\n    }\n    subscribe(observerOrNext, error, complete) {\n        const subscriber = isSubscriber(observerOrNext) ? observerOrNext : new SafeSubscriber(observerOrNext, error, complete);\n        const { operator, source } = this;\n        subscriber.add(operator\n            ? operator.call(subscriber, source)\n            : source || config.useDeprecatedSynchronousErrorHandling\n                ? this._subscribe(subscriber)\n                : this._trySubscribe(subscriber));\n        return subscriber;\n    }\n    _trySubscribe(sink) {\n        try {\n            return this._subscribe(sink);\n        }\n        catch (err) {\n            if (config.useDeprecatedSynchronousErrorHandling) {\n                throw err;\n            }\n            sink.error(err);\n        }\n    }\n    forEach(next, promiseCtor) {\n        promiseCtor = getPromiseCtor(promiseCtor);\n        return new promiseCtor((resolve, reject) => {\n            let subscription;\n            subscription = this.subscribe((value) => {\n                try {\n                    next(value);\n                }\n                catch (err) {\n                    reject(err);\n                    subscription === null || subscription === void 0 ? void 0 : subscription.unsubscribe();\n                }\n            }, reject, resolve);\n        });\n    }\n    _subscribe(subscriber) {\n        var _a;\n        return (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber);\n    }\n    [Symbol_observable]() {\n        return this;\n    }\n    pipe(...operations) {\n        return operations.length ? pipeFromArray(operations)(this) : this;\n    }\n    toPromise(promiseCtor) {\n        promiseCtor = getPromiseCtor(promiseCtor);\n        return new promiseCtor((resolve, reject) => {\n            let value;\n            this.subscribe((x) => (value = x), (err) => reject(err), () => resolve(value));\n        });\n    }\n}\nObservable.create = (subscribe) => {\n    return new Observable(subscribe);\n};\nfunction getPromiseCtor(promiseCtor) {\n    var _a;\n    return (_a = promiseCtor !== null && promiseCtor !== void 0 ? promiseCtor : config.Promise) !== null && _a !== void 0 ? _a : Promise;\n}\nfunction isObserver(value) {\n    return value && isFunction(value.next) && isFunction(value.error) && isFunction(value.complete);\n}\nfunction isSubscriber(value) {\n    return (value && value instanceof Subscriber) || (isObserver(value) && isSubscription(value));\n}\n//# sourceMappingURL=Observable.js.map","/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = function(d, b) {\r\n    extendStatics = Object.setPrototypeOf ||\r\n        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\r\n    return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n    if (typeof b !== \"function\" && b !== null)\r\n        throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n    __assign = Object.assign || function __assign(t) {\r\n        for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n            s = arguments[i];\r\n            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n        }\r\n        return t;\r\n    }\r\n    return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n    var t = {};\r\n    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n        t[p] = s[p];\r\n    if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n                t[p[i]] = s[p[i]];\r\n        }\r\n    return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n    return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\r\n    return new (P || (P = Promise))(function (resolve, reject) {\r\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n        function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\r\n        step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n    });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [op[0] & 2, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\nexport var __createBinding = Object.create ? (function(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });\r\n}) : (function(o, m, k, k2) {\r\n    if (k2 === undefined) k2 = k;\r\n    o[k2] = m[k];\r\n});\r\n\r\nexport function __exportStar(m, o) {\r\n    for (var p in m) if (p !== \"default\" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);\r\n}\r\n\r\nexport function __values(o) {\r\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\r\n    if (m) return m.call(o);\r\n    if (o && typeof o.length === \"number\") return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\r\n}\r\n\r\nexport function __read(o, n) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n    if (!m) return o;\r\n    var i = m.call(o), r, ar = [], e;\r\n    try {\r\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n    }\r\n    catch (error) { e = { error: error }; }\r\n    finally {\r\n        try {\r\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n        }\r\n        finally { if (e) throw e.error; }\r\n    }\r\n    return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spread() {\r\n    for (var ar = [], i = 0; i < arguments.length; i++)\r\n        ar = ar.concat(__read(arguments[i]));\r\n    return ar;\r\n}\r\n\r\n/** @deprecated */\r\nexport function __spreadArrays() {\r\n    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n    for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n            r[k] = a[j];\r\n    return r;\r\n}\r\n\r\nexport function __spreadArray(to, from) {\r\n    for (var i = 0, il = from.length, j = to.length; i < il; i++, j++)\r\n        to[j] = from[i];\r\n    return to;\r\n}\r\n\r\nexport function __await(v) {\r\n    return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n    return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n    function fulfill(value) { resume(\"next\", value); }\r\n    function reject(value) { resume(\"throw\", value); }\r\n    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n    var i, p;\r\n    return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var m = o[Symbol.asyncIterator], i;\r\n    return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n    if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n    return cooked;\r\n};\r\n\r\nvar __setModuleDefault = Object.create ? (function(o, v) {\r\n    Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n    o[\"default\"] = v;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n    if (mod && mod.__esModule) return mod;\r\n    var result = {};\r\n    if (mod != null) for (var k in mod) if (k !== \"default\" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);\r\n    __setModuleDefault(result, mod);\r\n    return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n    return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n\r\nexport function __classPrivateFieldGet(receiver, privateMap) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to get private field on non-instance\");\r\n    }\r\n    return privateMap.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, privateMap, value) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to set private field on non-instance\");\r\n    }\r\n    privateMap.set(receiver, value);\r\n    return value;\r\n}\r\n","import { isFunction } from \"./isFunction\";\nexport function isPromise(value) {\n    return isFunction(value === null || value === void 0 ? void 0 : value.then);\n}\n//# sourceMappingURL=isPromise.js.map","export function getSymbolIterator() {\n    if (typeof Symbol !== 'function' || !Symbol.iterator) {\n        return '@@iterator';\n    }\n    return Symbol.iterator;\n}\nexport const iterator = getSymbolIterator();\nexport const $$iterator = iterator;\n//# sourceMappingURL=iterator.js.map","import { observable as Symbol_observable } from '../symbol/observable';\nimport { isFunction } from './isFunction';\nexport function isInteropObservable(input) {\n    return isFunction(input[Symbol_observable]);\n}\n//# sourceMappingURL=isInteropObservable.js.map","import { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { isFunction } from './isFunction';\nexport function isIterable(input) {\n    return isFunction(input === null || input === void 0 ? void 0 : input[Symbol_iterator]);\n}\n//# sourceMappingURL=isIterable.js.map","import { isFunction } from './isFunction';\nexport function isAsyncIterable(obj) {\n    return Symbol.asyncIterator && isFunction(obj === null || obj === void 0 ? void 0 : obj[Symbol.asyncIterator]);\n}\n//# sourceMappingURL=isAsyncIterable.js.map","export function createInvalidObservableTypeError(input) {\n    return new TypeError(`You provided ${input !== null && typeof input === 'object' ? 'an invalid object' : `'${input}'`} where a stream was expected. You can provide an Observable, Promise, Array, AsyncIterable, or Iterable.`);\n}\n//# sourceMappingURL=throwUnobservableError.js.map","import { scheduleObservable } from './scheduleObservable';\nimport { schedulePromise } from './schedulePromise';\nimport { scheduleArray } from './scheduleArray';\nimport { scheduleIterable } from './scheduleIterable';\nimport { isInteropObservable } from '../util/isInteropObservable';\nimport { isPromise } from '../util/isPromise';\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isIterable } from '../util/isIterable';\nimport { scheduleAsyncIterable } from './scheduleAsyncIterable';\nimport { isAsyncIterable } from '../util/isAsyncIterable';\nimport { createInvalidObservableTypeError } from '../util/throwUnobservableError';\nexport function scheduled(input, scheduler) {\n    if (input != null) {\n        if (isInteropObservable(input)) {\n            return scheduleObservable(input, scheduler);\n        }\n        if (isArrayLike(input)) {\n            return scheduleArray(input, scheduler);\n        }\n        if (isPromise(input)) {\n            return schedulePromise(input, scheduler);\n        }\n        if (isAsyncIterable(input)) {\n            return scheduleAsyncIterable(input, scheduler);\n        }\n        if (isIterable(input)) {\n            return scheduleIterable(input, scheduler);\n        }\n    }\n    throw createInvalidObservableTypeError(input);\n}\n//# sourceMappingURL=scheduled.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nimport { observable as Symbol_observable } from '../symbol/observable';\nexport function scheduleObservable(input, scheduler) {\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        sub.add(scheduler.schedule(() => {\n            const observable = input[Symbol_observable]();\n            sub.add(observable.subscribe({\n                next(value) { sub.add(scheduler.schedule(() => subscriber.next(value))); },\n                error(err) { sub.add(scheduler.schedule(() => subscriber.error(err))); },\n                complete() { sub.add(scheduler.schedule(() => subscriber.complete())); },\n            }));\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleObservable.js.map","import { Observable } from '../Observable';\nexport function schedulePromise(input, scheduler) {\n    return new Observable((subscriber) => {\n        return scheduler.schedule(() => input.then((value) => {\n            subscriber.add(scheduler.schedule(() => {\n                subscriber.next(value);\n                subscriber.add(scheduler.schedule(() => subscriber.complete()));\n            }));\n        }, (err) => {\n            subscriber.add(scheduler.schedule(() => subscriber.error(err)));\n        }));\n    });\n}\n//# sourceMappingURL=schedulePromise.js.map","import { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nexport function scheduleAsyncIterable(input, scheduler) {\n    if (!input) {\n        throw new Error('Iterable cannot be null');\n    }\n    return new Observable(subscriber => {\n        const sub = new Subscription();\n        sub.add(scheduler.schedule(() => {\n            const iterator = input[Symbol.asyncIterator]();\n            sub.add(scheduler.schedule(function () {\n                iterator.next().then(result => {\n                    if (result.done) {\n                        subscriber.complete();\n                    }\n                    else {\n                        subscriber.next(result.value);\n                        this.schedule();\n                    }\n                });\n            }));\n        }));\n        return sub;\n    });\n}\n//# sourceMappingURL=scheduleAsyncIterable.js.map","import { Observable } from '../Observable';\nimport { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { isFunction } from '../util/isFunction';\nimport { caughtSchedule } from '../util/caughtSchedule';\nexport function scheduleIterable(input, scheduler) {\n    return new Observable((subscriber) => {\n        let iterator;\n        subscriber.add(scheduler.schedule(() => {\n            iterator = input[Symbol_iterator]();\n            caughtSchedule(subscriber, scheduler, function () {\n                const { value, done } = iterator.next();\n                if (done) {\n                    subscriber.complete();\n                }\n                else {\n                    subscriber.next(value);\n                    this.schedule();\n                }\n            });\n        }));\n        return () => isFunction(iterator === null || iterator === void 0 ? void 0 : iterator.return) && iterator.return();\n    });\n}\n//# sourceMappingURL=scheduleIterable.js.map","export function caughtSchedule(subscriber, scheduler, execute, delay = 0) {\n    const subscription = scheduler.schedule(function () {\n        try {\n            execute.call(this);\n        }\n        catch (err) {\n            subscriber.error(err);\n        }\n    }, delay);\n    subscriber.add(subscription);\n    return subscription;\n}\n//# sourceMappingURL=caughtSchedule.js.map","import { __asyncValues, __awaiter } from \"tslib\";\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isPromise } from '../util/isPromise';\nimport { iterator as Symbol_iterator } from '../symbol/iterator';\nimport { observable as Symbol_observable } from '../symbol/observable';\nimport { Observable } from '../Observable';\nimport { scheduled } from '../scheduled/scheduled';\nimport { isFunction } from '../util/isFunction';\nimport { reportUnhandledError } from '../util/reportUnhandledError';\nimport { isInteropObservable } from '../util/isInteropObservable';\nimport { isAsyncIterable } from '../util/isAsyncIterable';\nimport { createInvalidObservableTypeError } from '../util/throwUnobservableError';\nimport { isIterable } from '../util/isIterable';\nexport function from(input, scheduler) {\n    return scheduler ? scheduled(input, scheduler) : innerFrom(input);\n}\nexport function innerFrom(input) {\n    if (input instanceof Observable) {\n        return input;\n    }\n    if (input != null) {\n        if (isInteropObservable(input)) {\n            return fromInteropObservable(input);\n        }\n        if (isArrayLike(input)) {\n            return fromArrayLike(input);\n        }\n        if (isPromise(input)) {\n            return fromPromise(input);\n        }\n        if (isAsyncIterable(input)) {\n            return fromAsyncIterable(input);\n        }\n        if (isIterable(input)) {\n            return fromIterable(input);\n        }\n    }\n    throw createInvalidObservableTypeError(input);\n}\nfunction fromInteropObservable(obj) {\n    return new Observable((subscriber) => {\n        const obs = obj[Symbol_observable]();\n        if (isFunction(obs.subscribe)) {\n            return obs.subscribe(subscriber);\n        }\n        throw new TypeError('Provided object does not correctly implement Symbol.observable');\n    });\n}\nexport function fromArrayLike(array) {\n    return new Observable((subscriber) => {\n        for (let i = 0; i < array.length && !subscriber.closed; i++) {\n            subscriber.next(array[i]);\n        }\n        subscriber.complete();\n    });\n}\nfunction fromPromise(promise) {\n    return new Observable((subscriber) => {\n        promise\n            .then((value) => {\n            if (!subscriber.closed) {\n                subscriber.next(value);\n                subscriber.complete();\n            }\n        }, (err) => subscriber.error(err))\n            .then(null, reportUnhandledError);\n    });\n}\nfunction fromIterable(iterable) {\n    return new Observable((subscriber) => {\n        const iterator = iterable[Symbol_iterator]();\n        while (!subscriber.closed) {\n            const { done, value } = iterator.next();\n            if (done) {\n                subscriber.complete();\n            }\n            else {\n                subscriber.next(value);\n            }\n        }\n        return () => isFunction(iterator === null || iterator === void 0 ? void 0 : iterator.return) && iterator.return();\n    });\n}\nfunction fromAsyncIterable(asyncIterable) {\n    return new Observable((subscriber) => {\n        process(asyncIterable, subscriber).catch((err) => subscriber.error(err));\n    });\n}\nfunction process(asyncIterable, subscriber) {\n    var asyncIterable_1, asyncIterable_1_1;\n    var e_1, _a;\n    return __awaiter(this, void 0, void 0, function* () {\n        try {\n            for (asyncIterable_1 = __asyncValues(asyncIterable); asyncIterable_1_1 = yield asyncIterable_1.next(), !asyncIterable_1_1.done;) {\n                const value = asyncIterable_1_1.value;\n                subscriber.next(value);\n            }\n        }\n        catch (e_1_1) { e_1 = { error: e_1_1 }; }\n        finally {\n            try {\n                if (asyncIterable_1_1 && !asyncIterable_1_1.done && (_a = asyncIterable_1.return)) yield _a.call(asyncIterable_1);\n            }\n            finally { if (e_1) throw e_1.error; }\n        }\n        subscriber.complete();\n    });\n}\n//# sourceMappingURL=from.js.map","import { isFunction } from './isFunction';\nimport { isScheduler } from './isScheduler';\nfunction last(arr) {\n    return arr[arr.length - 1];\n}\nexport function popResultSelector(args) {\n    return isFunction(last(args)) ? args.pop() : undefined;\n}\nexport function popScheduler(args) {\n    return isScheduler(last(args)) ? args.pop() : undefined;\n}\nexport function popNumber(args, defaultValue) {\n    return typeof last(args) === 'number' ? args.pop() : defaultValue;\n}\n//# sourceMappingURL=args.js.map","import { createErrorClass } from './createErrorClass';\nexport const UnsubscriptionError = createErrorClass((_super) => function UnsubscriptionErrorImpl(errors) {\n    _super(this);\n    this.message = errors\n        ? `${errors.length} errors occurred during unsubscription:\n${errors.map((err, i) => `${i + 1}) ${err.toString()}`).join('\\n  ')}`\n        : '';\n    this.name = 'UnsubscriptionError';\n    this.errors = errors;\n});\n//# sourceMappingURL=UnsubscriptionError.js.map","import { isFunction } from './util/isFunction';\nimport { UnsubscriptionError } from './util/UnsubscriptionError';\nimport { arrRemove } from './util/arrRemove';\nexport class Subscription {\n    constructor(initialTeardown) {\n        this.initialTeardown = initialTeardown;\n        this.closed = false;\n        this._parentage = null;\n        this._teardowns = null;\n    }\n    unsubscribe() {\n        let errors;\n        if (!this.closed) {\n            this.closed = true;\n            const { _parentage } = this;\n            if (Array.isArray(_parentage)) {\n                for (const parent of _parentage) {\n                    parent.remove(this);\n                }\n            }\n            else {\n                _parentage === null || _parentage === void 0 ? void 0 : _parentage.remove(this);\n            }\n            const { initialTeardown } = this;\n            if (isFunction(initialTeardown)) {\n                try {\n                    initialTeardown();\n                }\n                catch (e) {\n                    errors = e instanceof UnsubscriptionError ? e.errors : [e];\n                }\n            }\n            const { _teardowns } = this;\n            if (_teardowns) {\n                this._teardowns = null;\n                for (const teardown of _teardowns) {\n                    try {\n                        execTeardown(teardown);\n                    }\n                    catch (err) {\n                        errors = errors !== null && errors !== void 0 ? errors : [];\n                        if (err instanceof UnsubscriptionError) {\n                            errors = [...errors, ...err.errors];\n                        }\n                        else {\n                            errors.push(err);\n                        }\n                    }\n                }\n            }\n            if (errors) {\n                throw new UnsubscriptionError(errors);\n            }\n        }\n    }\n    add(teardown) {\n        var _a;\n        if (teardown && teardown !== this) {\n            if (this.closed) {\n                execTeardown(teardown);\n            }\n            else {\n                if (teardown instanceof Subscription) {\n                    if (teardown.closed || teardown._hasParent(this)) {\n                        return;\n                    }\n                    teardown._addParent(this);\n                }\n                (this._teardowns = (_a = this._teardowns) !== null && _a !== void 0 ? _a : []).push(teardown);\n            }\n        }\n    }\n    _hasParent(parent) {\n        const { _parentage } = this;\n        return _parentage === parent || (Array.isArray(_parentage) && _parentage.includes(parent));\n    }\n    _addParent(parent) {\n        const { _parentage } = this;\n        this._parentage = Array.isArray(_parentage) ? (_parentage.push(parent), _parentage) : _parentage ? [_parentage, parent] : parent;\n    }\n    _removeParent(parent) {\n        const { _parentage } = this;\n        if (_parentage === parent) {\n            this._parentage = null;\n        }\n        else if (Array.isArray(_parentage)) {\n            arrRemove(_parentage, parent);\n        }\n    }\n    remove(teardown) {\n        const { _teardowns } = this;\n        _teardowns && arrRemove(_teardowns, teardown);\n        if (teardown instanceof Subscription) {\n            teardown._removeParent(this);\n        }\n    }\n}\nSubscription.EMPTY = (() => {\n    const empty = new Subscription();\n    empty.closed = true;\n    return empty;\n})();\nexport const EMPTY_SUBSCRIPTION = Subscription.EMPTY;\nexport function isSubscription(value) {\n    return (value instanceof Subscription ||\n        (value && 'closed' in value && isFunction(value.remove) && isFunction(value.add) && isFunction(value.unsubscribe)));\n}\nfunction execTeardown(teardown) {\n    if (isFunction(teardown)) {\n        teardown();\n    }\n    else {\n        teardown.unsubscribe();\n    }\n}\n//# sourceMappingURL=Subscription.js.map","export function noop() { }\n//# sourceMappingURL=noop.js.map","export function identity(x) {\n    return x;\n}\n//# sourceMappingURL=identity.js.map","export const config = {\n    onUnhandledError: null,\n    onStoppedNotification: null,\n    Promise: undefined,\n    useDeprecatedSynchronousErrorHandling: false,\n    useDeprecatedNextContext: false,\n};\n//# sourceMappingURL=config.js.map","export function arrRemove(arr, item) {\n    if (arr) {\n        const index = arr.indexOf(item);\n        0 <= index && arr.splice(index, 1);\n    }\n}\n//# sourceMappingURL=arrRemove.js.map","import { map } from './map';\nimport { innerFrom } from '../observable/from';\nimport { operate } from '../util/lift';\nimport { mergeInternals } from './mergeInternals';\nimport { isFunction } from '../util/isFunction';\nexport function mergeMap(project, resultSelector, concurrent = Infinity) {\n    if (isFunction(resultSelector)) {\n        return mergeMap((a, i) => map((b, ii) => resultSelector(a, b, i, ii))(innerFrom(project(a, i))), concurrent);\n    }\n    else if (typeof resultSelector === 'number') {\n        concurrent = resultSelector;\n    }\n    return operate((source, subscriber) => mergeInternals(source, subscriber, project, concurrent));\n}\nexport const flatMap = mergeMap;\n//# sourceMappingURL=mergeMap.js.map","import { innerFrom } from '../observable/from';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function mergeInternals(source, subscriber, project, concurrent, onBeforeNext, expand, innerSubScheduler, additionalTeardown) {\n    let buffer = [];\n    let active = 0;\n    let index = 0;\n    let isComplete = false;\n    const checkComplete = () => {\n        if (isComplete && !buffer.length && !active) {\n            subscriber.complete();\n        }\n    };\n    const outerNext = (value) => (active < concurrent ? doInnerSub(value) : buffer.push(value));\n    const doInnerSub = (value) => {\n        expand && subscriber.next(value);\n        active++;\n        innerFrom(project(value, index++)).subscribe(new OperatorSubscriber(subscriber, (innerValue) => {\n            onBeforeNext === null || onBeforeNext === void 0 ? void 0 : onBeforeNext(innerValue);\n            if (expand) {\n                outerNext(innerValue);\n            }\n            else {\n                subscriber.next(innerValue);\n            }\n        }, undefined, () => {\n            active--;\n            while (buffer.length && active < concurrent) {\n                const bufferedValue = buffer.shift();\n                innerSubScheduler ? subscriber.add(innerSubScheduler.schedule(() => doInnerSub(bufferedValue))) : doInnerSub(bufferedValue);\n            }\n            checkComplete();\n        }));\n    };\n    source.subscribe(new OperatorSubscriber(subscriber, outerNext, undefined, () => {\n        isComplete = true;\n        checkComplete();\n    }));\n    return () => {\n        buffer = null;\n        additionalTeardown === null || additionalTeardown === void 0 ? void 0 : additionalTeardown();\n    };\n}\n//# sourceMappingURL=mergeInternals.js.map","export const observable = (() => (typeof Symbol === 'function' && Symbol.observable) || '@@observable')();\n//# sourceMappingURL=observable.js.map","import { scheduleArray } from '../scheduled/scheduleArray';\nimport { fromArrayLike } from './from';\nexport function internalFromArray(input, scheduler) {\n    return scheduler ? scheduleArray(input, scheduler) : fromArrayLike(input);\n}\n//# sourceMappingURL=fromArray.js.map","export const COMPLETE_NOTIFICATION = (() => createNotification('C', undefined, undefined))();\nexport function errorNotification(error) {\n    return createNotification('E', undefined, error);\n}\nexport function nextNotification(value) {\n    return createNotification('N', value, undefined);\n}\nexport function createNotification(kind, value, error) {\n    return {\n        kind,\n        value,\n        error,\n    };\n}\n//# sourceMappingURL=NotificationFactories.js.map","import { isFunction } from './util/isFunction';\nimport { isSubscription, Subscription } from './Subscription';\nimport { config } from './config';\nimport { reportUnhandledError } from './util/reportUnhandledError';\nimport { noop } from './util/noop';\nimport { nextNotification, errorNotification, COMPLETE_NOTIFICATION } from './NotificationFactories';\nimport { timeoutProvider } from './scheduler/timeoutProvider';\nexport class Subscriber extends Subscription {\n    constructor(destination) {\n        super();\n        this.isStopped = false;\n        if (destination) {\n            this.destination = destination;\n            if (isSubscription(destination)) {\n                destination.add(this);\n            }\n        }\n        else {\n            this.destination = EMPTY_OBSERVER;\n        }\n    }\n    static create(next, error, complete) {\n        return new SafeSubscriber(next, error, complete);\n    }\n    next(value) {\n        if (this.isStopped) {\n            handleStoppedNotification(nextNotification(value), this);\n        }\n        else {\n            this._next(value);\n        }\n    }\n    error(err) {\n        if (this.isStopped) {\n            handleStoppedNotification(errorNotification(err), this);\n        }\n        else {\n            this.isStopped = true;\n            this._error(err);\n        }\n    }\n    complete() {\n        if (this.isStopped) {\n            handleStoppedNotification(COMPLETE_NOTIFICATION, this);\n        }\n        else {\n            this.isStopped = true;\n            this._complete();\n        }\n    }\n    unsubscribe() {\n        if (!this.closed) {\n            this.isStopped = true;\n            super.unsubscribe();\n        }\n    }\n    _next(value) {\n        this.destination.next(value);\n    }\n    _error(err) {\n        this.destination.error(err);\n        this.unsubscribe();\n    }\n    _complete() {\n        this.destination.complete();\n        this.unsubscribe();\n    }\n}\nexport class SafeSubscriber extends Subscriber {\n    constructor(observerOrNext, error, complete) {\n        super();\n        this.destination = EMPTY_OBSERVER;\n        if ((observerOrNext || error || complete) && observerOrNext !== EMPTY_OBSERVER) {\n            let next;\n            if (isFunction(observerOrNext)) {\n                next = observerOrNext;\n            }\n            else if (observerOrNext) {\n                ({ next, error, complete } = observerOrNext);\n                let context;\n                if (this && config.useDeprecatedNextContext) {\n                    context = Object.create(observerOrNext);\n                    context.unsubscribe = () => this.unsubscribe();\n                }\n                else {\n                    context = observerOrNext;\n                }\n                next = next === null || next === void 0 ? void 0 : next.bind(context);\n                error = error === null || error === void 0 ? void 0 : error.bind(context);\n                complete = complete === null || complete === void 0 ? void 0 : complete.bind(context);\n            }\n            this.destination = {\n                next: next || noop,\n                error: error || defaultErrorHandler,\n                complete: complete || noop,\n            };\n        }\n    }\n}\nfunction defaultErrorHandler(err) {\n    if (config.useDeprecatedSynchronousErrorHandling) {\n        throw err;\n    }\n    reportUnhandledError(err);\n}\nfunction handleStoppedNotification(notification, subscriber) {\n    const { onStoppedNotification } = config;\n    onStoppedNotification && timeoutProvider.setTimeout(() => onStoppedNotification(notification, subscriber));\n}\nexport const EMPTY_OBSERVER = {\n    closed: true,\n    next: noop,\n    error: defaultErrorHandler,\n    complete: noop,\n};\n//# sourceMappingURL=Subscriber.js.map","import { map } from \"../operators/map\";\nconst { isArray } = Array;\nfunction callOrApply(fn, args) {\n    return isArray(args) ? fn(...args) : fn(args);\n}\nexport function mapOneOrManyArgs(fn) {\n    return map(args => callOrApply(fn, args));\n}\n//# sourceMappingURL=mapOneOrManyArgs.js.map","export const isArrayLike = ((x) => x && typeof x.length === 'number' && typeof x !== 'function');\n//# sourceMappingURL=isArrayLike.js.map","import { Observable } from '../Observable';\nexport function scheduleArray(input, scheduler) {\n    return new Observable((subscriber) => {\n        let i = 0;\n        return scheduler.schedule(function () {\n            if (i === input.length) {\n                subscriber.complete();\n            }\n            else {\n                subscriber.next(input[i++]);\n                if (!subscriber.closed) {\n                    this.schedule();\n                }\n            }\n        });\n    });\n}\n//# sourceMappingURL=scheduleArray.js.map","const { isArray } = Array;\nexport function argsOrArgArray(args) {\n    return args.length === 1 && isArray(args[0]) ? args[0] : args;\n}\n//# sourceMappingURL=argsOrArgArray.js.map","import { Observable } from '../Observable';\nexport const EMPTY = new Observable(subscriber => subscriber.complete());\nexport function empty(scheduler) {\n    return scheduler ? emptyScheduled(scheduler) : EMPTY;\n}\nfunction emptyScheduled(scheduler) {\n    return new Observable(subscriber => scheduler.schedule(() => subscriber.complete()));\n}\n//# sourceMappingURL=empty.js.map","import { AsyncAction } from './AsyncAction';\nimport { AsyncScheduler } from './AsyncScheduler';\nexport const asyncScheduler = new AsyncScheduler(AsyncAction);\nexport const async = asyncScheduler;\n//# sourceMappingURL=async.js.map","import { createErrorClass } from './createErrorClass';\nexport const ObjectUnsubscribedError = createErrorClass((_super) => function ObjectUnsubscribedErrorImpl() {\n    _super(this);\n    this.name = 'ObjectUnsubscribedError';\n    this.message = 'object unsubscribed';\n});\n//# sourceMappingURL=ObjectUnsubscribedError.js.map","import { Observable } from './Observable';\nimport { Subscription, EMPTY_SUBSCRIPTION } from './Subscription';\nimport { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';\nimport { arrRemove } from './util/arrRemove';\nexport class Subject extends Observable {\n    constructor() {\n        super();\n        this.observers = [];\n        this.closed = false;\n        this.isStopped = false;\n        this.hasError = false;\n        this.thrownError = null;\n    }\n    lift(operator) {\n        const subject = new AnonymousSubject(this, this);\n        subject.operator = operator;\n        return subject;\n    }\n    _throwIfClosed() {\n        if (this.closed) {\n            throw new ObjectUnsubscribedError();\n        }\n    }\n    next(value) {\n        this._throwIfClosed();\n        if (!this.isStopped) {\n            const copy = this.observers.slice();\n            for (const observer of copy) {\n                observer.next(value);\n            }\n        }\n    }\n    error(err) {\n        this._throwIfClosed();\n        if (!this.isStopped) {\n            this.hasError = this.isStopped = true;\n            this.thrownError = err;\n            const { observers } = this;\n            while (observers.length) {\n                observers.shift().error(err);\n            }\n        }\n    }\n    complete() {\n        this._throwIfClosed();\n        if (!this.isStopped) {\n            this.isStopped = true;\n            const { observers } = this;\n            while (observers.length) {\n                observers.shift().complete();\n            }\n        }\n    }\n    unsubscribe() {\n        this.isStopped = this.closed = true;\n        this.observers = null;\n    }\n    _trySubscribe(subscriber) {\n        this._throwIfClosed();\n        return super._trySubscribe(subscriber);\n    }\n    _subscribe(subscriber) {\n        this._throwIfClosed();\n        this._checkFinalizedStatuses(subscriber);\n        return this._innerSubscribe(subscriber);\n    }\n    _innerSubscribe(subscriber) {\n        const { hasError, isStopped, observers } = this;\n        return hasError || isStopped\n            ? EMPTY_SUBSCRIPTION\n            : (observers.push(subscriber), new Subscription(() => arrRemove(this.observers, subscriber)));\n    }\n    _checkFinalizedStatuses(subscriber) {\n        const { hasError, thrownError, isStopped } = this;\n        if (hasError) {\n            subscriber.error(thrownError);\n        }\n        else if (isStopped) {\n            subscriber.complete();\n        }\n    }\n    asObservable() {\n        const observable = new Observable();\n        observable.source = this;\n        return observable;\n    }\n}\nSubject.create = (destination, source) => {\n    return new AnonymousSubject(destination, source);\n};\nexport class AnonymousSubject extends Subject {\n    constructor(destination, source) {\n        super();\n        this.destination = destination;\n        this.source = source;\n    }\n    next(value) {\n        var _a, _b;\n        (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.next) === null || _b === void 0 ? void 0 : _b.call(_a, value);\n    }\n    error(err) {\n        var _a, _b;\n        (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.error) === null || _b === void 0 ? void 0 : _b.call(_a, err);\n    }\n    complete() {\n        var _a, _b;\n        (_b = (_a = this.destination) === null || _a === void 0 ? void 0 : _a.complete) === null || _b === void 0 ? void 0 : _b.call(_a);\n    }\n    _subscribe(subscriber) {\n        var _a, _b;\n        return (_b = (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber)) !== null && _b !== void 0 ? _b : EMPTY_SUBSCRIPTION;\n    }\n}\n//# sourceMappingURL=Subject.js.map","import { concatAll } from '../operators/concatAll';\nimport { internalFromArray } from './fromArray';\nimport { popScheduler } from '../util/args';\nexport function concat(...args) {\n    return concatAll()(internalFromArray(args, popScheduler(args)));\n}\n//# sourceMappingURL=concat.js.map","import { mergeAll } from './mergeAll';\nexport function concatAll() {\n    return mergeAll(1);\n}\n//# sourceMappingURL=concatAll.js.map","export function createErrorClass(createImpl) {\n    const _super = (instance) => {\n        Error.call(instance);\n        instance.stack = new Error().stack;\n    };\n    const ctorFunc = createImpl(_super);\n    ctorFunc.prototype = Object.create(Error.prototype);\n    ctorFunc.prototype.constructor = ctorFunc;\n    return ctorFunc;\n}\n//# sourceMappingURL=createErrorClass.js.map","import { config } from '../config';\nimport { timeoutProvider } from '../scheduler/timeoutProvider';\nexport function reportUnhandledError(err) {\n    timeoutProvider.setTimeout(() => {\n        const { onUnhandledError } = config;\n        if (onUnhandledError) {\n            onUnhandledError(err);\n        }\n        else {\n            throw err;\n        }\n    });\n}\n//# sourceMappingURL=reportUnhandledError.js.map","export const timeoutProvider = {\n    setTimeout(...args) {\n        const { delegate } = timeoutProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.setTimeout) || setTimeout)(...args);\n    },\n    clearTimeout(handle) {\n        const { delegate } = timeoutProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.clearTimeout) || clearTimeout)(handle);\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=timeoutProvider.js.map","import { identity } from './identity';\nexport function pipe(...fns) {\n    return pipeFromArray(fns);\n}\nexport function pipeFromArray(fns) {\n    if (fns.length === 0) {\n        return identity;\n    }\n    if (fns.length === 1) {\n        return fns[0];\n    }\n    return function piped(input) {\n        return fns.reduce((prev, fn) => fn(prev), input);\n    };\n}\n//# sourceMappingURL=pipe.js.map","export const dateTimestampProvider = {\n    now() {\n        return (dateTimestampProvider.delegate || Date).now();\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=dateTimestampProvider.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function map(project, thisArg) {\n    return operate((source, subscriber) => {\n        let index = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            subscriber.next(project.call(thisArg, value, index++));\n        }));\n    });\n}\n//# sourceMappingURL=map.js.map","import { isFunction } from './isFunction';\nexport function isScheduler(value) {\n    return value && isFunction(value.schedule);\n}\n//# sourceMappingURL=isScheduler.js.map","import { mergeMap } from './mergeMap';\nimport { identity } from '../util/identity';\nexport function mergeAll(concurrent = Infinity) {\n    return mergeMap(identity, concurrent);\n}\n//# sourceMappingURL=mergeAll.js.map","import { Subscription } from '../Subscription';\nexport class Action extends Subscription {\n    constructor(scheduler, work) {\n        super();\n    }\n    schedule(state, delay = 0) {\n        return this;\n    }\n}\n//# sourceMappingURL=Action.js.map","export const intervalProvider = {\n    setInterval(...args) {\n        const { delegate } = intervalProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.setInterval) || setInterval)(...args);\n    },\n    clearInterval(handle) {\n        const { delegate } = intervalProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.clearInterval) || clearInterval)(handle);\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=intervalProvider.js.map","import { Action } from './Action';\nimport { intervalProvider } from './intervalProvider';\nimport { arrRemove } from '../util/arrRemove';\nexport class AsyncAction extends Action {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n        this.pending = false;\n    }\n    schedule(state, delay = 0) {\n        if (this.closed) {\n            return this;\n        }\n        this.state = state;\n        const id = this.id;\n        const scheduler = this.scheduler;\n        if (id != null) {\n            this.id = this.recycleAsyncId(scheduler, id, delay);\n        }\n        this.pending = true;\n        this.delay = delay;\n        this.id = this.id || this.requestAsyncId(scheduler, this.id, delay);\n        return this;\n    }\n    requestAsyncId(scheduler, _id, delay = 0) {\n        return intervalProvider.setInterval(scheduler.flush.bind(scheduler, this), delay);\n    }\n    recycleAsyncId(_scheduler, id, delay = 0) {\n        if (delay != null && this.delay === delay && this.pending === false) {\n            return id;\n        }\n        intervalProvider.clearInterval(id);\n        return undefined;\n    }\n    execute(state, delay) {\n        if (this.closed) {\n            return new Error('executing a cancelled action');\n        }\n        this.pending = false;\n        const error = this._execute(state, delay);\n        if (error) {\n            return error;\n        }\n        else if (this.pending === false && this.id != null) {\n            this.id = this.recycleAsyncId(this.scheduler, this.id, null);\n        }\n    }\n    _execute(state, _delay) {\n        let errored = false;\n        let errorValue;\n        try {\n            this.work(state);\n        }\n        catch (e) {\n            errored = true;\n            errorValue = (!!e && e) || new Error(e);\n        }\n        if (errored) {\n            this.unsubscribe();\n            return errorValue;\n        }\n    }\n    unsubscribe() {\n        if (!this.closed) {\n            const { id, scheduler } = this;\n            const { actions } = scheduler;\n            this.work = this.state = this.scheduler = null;\n            this.pending = false;\n            arrRemove(actions, this);\n            if (id != null) {\n                this.id = this.recycleAsyncId(scheduler, id, null);\n            }\n            this.delay = null;\n            super.unsubscribe();\n        }\n    }\n}\n//# sourceMappingURL=AsyncAction.js.map","import { Observable } from '../Observable';\nimport { async as asyncScheduler } from '../scheduler/async';\nimport { isScheduler } from '../util/isScheduler';\nimport { isValidDate } from '../util/isDate';\nexport function timer(dueTime = 0, intervalOrScheduler, scheduler = asyncScheduler) {\n    let intervalDuration = -1;\n    if (intervalOrScheduler != null) {\n        if (isScheduler(intervalOrScheduler)) {\n            scheduler = intervalOrScheduler;\n        }\n        else {\n            intervalDuration = intervalOrScheduler;\n        }\n    }\n    return new Observable((subscriber) => {\n        let due = isValidDate(dueTime) ? +dueTime - scheduler.now() : dueTime;\n        if (due < 0) {\n            due = 0;\n        }\n        let n = 0;\n        return scheduler.schedule(function () {\n            if (!subscriber.closed) {\n                subscriber.next(n++);\n                if (0 <= intervalDuration) {\n                    this.schedule(undefined, intervalDuration);\n                }\n                else {\n                    subscriber.complete();\n                }\n            }\n        }, due);\n    });\n}\n//# sourceMappingURL=timer.js.map","export function isValidDate(value) {\n    return value instanceof Date && !isNaN(value);\n}\n//# sourceMappingURL=isDate.js.map","import { dateTimestampProvider } from \"./scheduler/dateTimestampProvider\";\nexport class Scheduler {\n    constructor(schedulerActionCtor, now = Scheduler.now) {\n        this.schedulerActionCtor = schedulerActionCtor;\n        this.now = now;\n    }\n    schedule(work, delay = 0, state) {\n        return new this.schedulerActionCtor(this, work).schedule(state, delay);\n    }\n}\nScheduler.now = dateTimestampProvider.now;\n//# sourceMappingURL=Scheduler.js.map","import { Scheduler } from '../Scheduler';\nexport class AsyncScheduler extends Scheduler {\n    constructor(SchedulerAction, now = Scheduler.now) {\n        super(SchedulerAction, now);\n        this.actions = [];\n        this.active = false;\n        this.scheduled = undefined;\n    }\n    flush(action) {\n        const { actions } = this;\n        if (this.active) {\n            actions.push(action);\n            return;\n        }\n        let error;\n        this.active = true;\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (action = actions.shift());\n        this.active = false;\n        if (error) {\n            while (action = actions.shift()) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AsyncScheduler.js.map","import { innerFrom } from '../observable/from';\nimport { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function switchMap(project, resultSelector) {\n    return operate((source, subscriber) => {\n        let innerSubscriber = null;\n        let index = 0;\n        let isComplete = false;\n        const checkComplete = () => isComplete && !innerSubscriber && subscriber.complete();\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            innerSubscriber === null || innerSubscriber === void 0 ? void 0 : innerSubscriber.unsubscribe();\n            let innerIndex = 0;\n            const outerIndex = index++;\n            innerFrom(project(value, outerIndex)).subscribe((innerSubscriber = new OperatorSubscriber(subscriber, (innerValue) => subscriber.next(resultSelector ? resultSelector(value, innerValue, outerIndex, innerIndex++) : innerValue), undefined, () => {\n                innerSubscriber = null;\n                checkComplete();\n            })));\n        }, undefined, () => {\n            isComplete = true;\n            checkComplete();\n        }));\n    });\n}\n//# sourceMappingURL=switchMap.js.map","import { EMPTY } from '../observable/empty';\nimport { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function take(count) {\n    return count <= 0\n        ?\n            () => EMPTY\n        : operate((source, subscriber) => {\n            let seen = 0;\n            source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n                if (++seen <= count) {\n                    subscriber.next(value);\n                    if (count <= seen) {\n                        subscriber.complete();\n                    }\n                }\n            }));\n        });\n}\n//# sourceMappingURL=take.js.map","/*!\n * clipboard.js v2.0.6\n * https://clipboardjs.com/\n * \n * Licensed MIT © Zeno Rocha\n */\n(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 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for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n/******/ \t\treturn ns;\n/******/ \t};\n/******/\n/******/ \t// getDefaultExport function for compatibility with non-harmony modules\n/******/ \t__webpack_require__.n = function(module) {\n/******/ \t\tvar getter = module && module.__esModule ?\n/******/ \t\t\tfunction getDefault() { return module['default']; } :\n/******/ \t\t\tfunction getModuleExports() { return module; };\n/******/ \t\t__webpack_require__.d(getter, 'a', getter);\n/******/ \t\treturn getter;\n/******/ \t};\n/******/\n/******/ \t// Object.prototype.hasOwnProperty.call\n/******/ \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n/******/\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"\";\n/******/\n/******/\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(__webpack_require__.s = 6);\n/******/ })\n/************************************************************************/\n/******/ ([\n/* 0 */\n/***/ (function(module, exports) {\n\nfunction select(element) {\n    var selectedText;\n\n    if (element.nodeName === 'SELECT') {\n        element.focus();\n\n        selectedText = element.value;\n    }\n    else if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA') {\n        var isReadOnly = element.hasAttribute('readonly');\n\n        if (!isReadOnly) {\n            element.setAttribute('readonly', '');\n        }\n\n        element.select();\n        element.setSelectionRange(0, element.value.length);\n\n        if (!isReadOnly) {\n            element.removeAttribute('readonly');\n        }\n\n        selectedText = element.value;\n    }\n    else {\n        if (element.hasAttribute('contenteditable')) {\n            element.focus();\n        }\n\n        var selection = window.getSelection();\n        var range = document.createRange();\n\n        range.selectNodeContents(element);\n        selection.removeAllRanges();\n        selection.addRange(range);\n\n        selectedText = selection.toString();\n    }\n\n    return selectedText;\n}\n\nmodule.exports = select;\n\n\n/***/ }),\n/* 1 */\n/***/ (function(module, exports) {\n\nfunction E () {\n  // Keep this empty so it's easier to inherit from\n  // (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)\n}\n\nE.prototype = {\n  on: function (name, callback, ctx) {\n    var e = this.e || (this.e = {});\n\n    (e[name] || (e[name] = [])).push({\n      fn: callback,\n      ctx: ctx\n    });\n\n    return this;\n  },\n\n  once: function (name, callback, ctx) {\n    var self = this;\n    function listener () {\n      self.off(name, listener);\n      callback.apply(ctx, arguments);\n    };\n\n    listener._ = callback\n    return this.on(name, listener, ctx);\n  },\n\n  emit: function (name) {\n    var data = [].slice.call(arguments, 1);\n    var evtArr = ((this.e || (this.e = {}))[name] || []).slice();\n    var i = 0;\n    var len = evtArr.length;\n\n    for (i; i < len; i++) {\n      evtArr[i].fn.apply(evtArr[i].ctx, data);\n    }\n\n    return this;\n  },\n\n  off: function (name, callback) {\n    var e = this.e || (this.e = {});\n    var evts = e[name];\n    var liveEvents = [];\n\n    if (evts && callback) {\n      for (var i = 0, len = evts.length; i < len; i++) {\n        if (evts[i].fn !== callback && evts[i].fn._ !== callback)\n          liveEvents.push(evts[i]);\n      }\n    }\n\n    // Remove event from queue to prevent memory leak\n    // Suggested by https://github.com/lazd\n    // Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910\n\n    (liveEvents.length)\n      ? e[name] = liveEvents\n      : delete e[name];\n\n    return this;\n  }\n};\n\nmodule.exports = E;\nmodule.exports.TinyEmitter = E;\n\n\n/***/ }),\n/* 2 */\n/***/ (function(module, exports, __webpack_require__) {\n\nvar is = __webpack_require__(3);\nvar delegate = __webpack_require__(4);\n\n/**\n * Validates all params and calls the right\n * listener function based on its target type.\n *\n * @param {String|HTMLElement|HTMLCollection|NodeList} target\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listen(target, type, callback) {\n    if (!target && !type && !callback) {\n        throw new Error('Missing required arguments');\n    }\n\n    if (!is.string(type)) {\n        throw new TypeError('Second argument must be a String');\n    }\n\n    if (!is.fn(callback)) {\n        throw new TypeError('Third argument must be a Function');\n    }\n\n    if (is.node(target)) {\n        return listenNode(target, type, callback);\n    }\n    else if (is.nodeList(target)) {\n        return listenNodeList(target, type, callback);\n    }\n    else if (is.string(target)) {\n        return listenSelector(target, type, callback);\n    }\n    else {\n        throw new TypeError('First argument must be a String, HTMLElement, HTMLCollection, or NodeList');\n    }\n}\n\n/**\n * Adds an event listener to a HTML element\n * and returns a remove listener function.\n *\n * @param {HTMLElement} node\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listenNode(node, type, callback) {\n    node.addEventListener(type, callback);\n\n    return {\n        destroy: function() {\n            node.removeEventListener(type, callback);\n        }\n    }\n}\n\n/**\n * Add an event listener to a list of HTML elements\n * and returns a remove listener function.\n *\n * @param {NodeList|HTMLCollection} nodeList\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listenNodeList(nodeList, type, callback) {\n    Array.prototype.forEach.call(nodeList, function(node) {\n        node.addEventListener(type, callback);\n    });\n\n    return {\n        destroy: function() {\n            Array.prototype.forEach.call(nodeList, function(node) {\n                node.removeEventListener(type, callback);\n            });\n        }\n    }\n}\n\n/**\n * Add an event listener to a selector\n * and returns a remove listener function.\n *\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @return {Object}\n */\nfunction listenSelector(selector, type, callback) {\n    return delegate(document.body, selector, type, callback);\n}\n\nmodule.exports = listen;\n\n\n/***/ }),\n/* 3 */\n/***/ (function(module, exports) {\n\n/**\n * Check if argument is a HTML element.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.node = function(value) {\n    return value !== undefined\n        && value instanceof HTMLElement\n        && value.nodeType === 1;\n};\n\n/**\n * Check if argument is a list of HTML elements.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.nodeList = function(value) {\n    var type = Object.prototype.toString.call(value);\n\n    return value !== undefined\n        && (type === '[object NodeList]' || type === '[object HTMLCollection]')\n        && ('length' in value)\n        && (value.length === 0 || exports.node(value[0]));\n};\n\n/**\n * Check if argument is a string.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.string = function(value) {\n    return typeof value === 'string'\n        || value instanceof String;\n};\n\n/**\n * Check if argument is a function.\n *\n * @param {Object} value\n * @return {Boolean}\n */\nexports.fn = function(value) {\n    var type = Object.prototype.toString.call(value);\n\n    return type === '[object Function]';\n};\n\n\n/***/ }),\n/* 4 */\n/***/ (function(module, exports, __webpack_require__) {\n\nvar closest = __webpack_require__(5);\n\n/**\n * Delegates event to a selector.\n *\n * @param {Element} element\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @param {Boolean} useCapture\n * @return {Object}\n */\nfunction _delegate(element, selector, type, callback, useCapture) {\n    var listenerFn = listener.apply(this, arguments);\n\n    element.addEventListener(type, listenerFn, useCapture);\n\n    return {\n        destroy: function() {\n            element.removeEventListener(type, listenerFn, useCapture);\n        }\n    }\n}\n\n/**\n * Delegates event to a selector.\n *\n * @param {Element|String|Array} [elements]\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @param {Boolean} useCapture\n * @return {Object}\n */\nfunction delegate(elements, selector, type, callback, useCapture) {\n    // Handle the regular Element usage\n    if (typeof elements.addEventListener === 'function') {\n        return _delegate.apply(null, arguments);\n    }\n\n    // Handle Element-less usage, it defaults to global delegation\n    if (typeof type === 'function') {\n        // Use `document` as the first parameter, then apply arguments\n        // This is a short way to .unshift `arguments` without running into deoptimizations\n        return _delegate.bind(null, document).apply(null, arguments);\n    }\n\n    // Handle Selector-based usage\n    if (typeof elements === 'string') {\n        elements = document.querySelectorAll(elements);\n    }\n\n    // Handle Array-like based usage\n    return Array.prototype.map.call(elements, function (element) {\n        return _delegate(element, selector, type, callback, useCapture);\n    });\n}\n\n/**\n * Finds closest match and invokes callback.\n *\n * @param {Element} element\n * @param {String} selector\n * @param {String} type\n * @param {Function} callback\n * @return {Function}\n */\nfunction listener(element, selector, type, callback) {\n    return function(e) {\n        e.delegateTarget = closest(e.target, selector);\n\n        if (e.delegateTarget) {\n            callback.call(element, e);\n        }\n    }\n}\n\nmodule.exports = delegate;\n\n\n/***/ }),\n/* 5 */\n/***/ (function(module, exports) {\n\nvar DOCUMENT_NODE_TYPE = 9;\n\n/**\n * A polyfill for Element.matches()\n */\nif (typeof Element !== 'undefined' && !Element.prototype.matches) {\n    var proto = Element.prototype;\n\n    proto.matches = proto.matchesSelector ||\n                    proto.mozMatchesSelector ||\n                    proto.msMatchesSelector ||\n                    proto.oMatchesSelector ||\n                    proto.webkitMatchesSelector;\n}\n\n/**\n * Finds the closest parent that matches a selector.\n *\n * @param {Element} element\n * @param {String} selector\n * @return {Function}\n */\nfunction closest (element, selector) {\n    while (element && element.nodeType !== DOCUMENT_NODE_TYPE) {\n        if (typeof element.matches === 'function' &&\n            element.matches(selector)) {\n          return element;\n        }\n        element = element.parentNode;\n    }\n}\n\nmodule.exports = closest;\n\n\n/***/ }),\n/* 6 */\n/***/ (function(module, __webpack_exports__, __webpack_require__) {\n\n\"use strict\";\n__webpack_require__.r(__webpack_exports__);\n\n// EXTERNAL MODULE: ./node_modules/select/src/select.js\nvar src_select = __webpack_require__(0);\nvar select_default = /*#__PURE__*/__webpack_require__.n(src_select);\n\n// CONCATENATED MODULE: ./src/clipboard-action.js\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n\n\n/**\n * Inner class which performs selection from either `text` or `target`\n * properties and then executes copy or cut operations.\n */\n\nvar clipboard_action_ClipboardAction = function () {\n    /**\n     * @param {Object} options\n     */\n    function ClipboardAction(options) {\n        _classCallCheck(this, ClipboardAction);\n\n        this.resolveOptions(options);\n        this.initSelection();\n    }\n\n    /**\n     * Defines base properties passed from constructor.\n     * @param {Object} options\n     */\n\n\n    _createClass(ClipboardAction, [{\n        key: 'resolveOptions',\n        value: function resolveOptions() {\n            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n            this.action = options.action;\n            this.container = options.container;\n            this.emitter = options.emitter;\n            this.target = options.target;\n            this.text = options.text;\n            this.trigger = options.trigger;\n\n            this.selectedText = '';\n        }\n\n        /**\n         * Decides which selection strategy is going to be applied based\n         * on the existence of `text` and `target` properties.\n         */\n\n    }, {\n        key: 'initSelection',\n        value: function initSelection() {\n            if (this.text) {\n                this.selectFake();\n            } else if (this.target) {\n                this.selectTarget();\n            }\n        }\n\n        /**\n         * Creates a fake textarea element, sets its value from `text` property,\n         * and makes a selection on it.\n         */\n\n    }, {\n        key: 'selectFake',\n        value: function selectFake() {\n            var _this = this;\n\n            var isRTL = document.documentElement.getAttribute('dir') == 'rtl';\n\n            this.removeFake();\n\n            this.fakeHandlerCallback = function () {\n                return _this.removeFake();\n            };\n            this.fakeHandler = this.container.addEventListener('click', this.fakeHandlerCallback) || true;\n\n            this.fakeElem = document.createElement('textarea');\n            // Prevent zooming on iOS\n            this.fakeElem.style.fontSize = '12pt';\n            // Reset box model\n            this.fakeElem.style.border = '0';\n            this.fakeElem.style.padding = '0';\n            this.fakeElem.style.margin = '0';\n            // Move element out of screen horizontally\n            this.fakeElem.style.position = 'absolute';\n            this.fakeElem.style[isRTL ? 'right' : 'left'] = '-9999px';\n            // Move element to the same position vertically\n            var yPosition = window.pageYOffset || document.documentElement.scrollTop;\n            this.fakeElem.style.top = yPosition + 'px';\n\n            this.fakeElem.setAttribute('readonly', '');\n            this.fakeElem.value = this.text;\n\n            this.container.appendChild(this.fakeElem);\n\n            this.selectedText = select_default()(this.fakeElem);\n            this.copyText();\n        }\n\n        /**\n         * Only removes the fake element after another click event, that way\n         * a user can hit `Ctrl+C` to copy because selection still exists.\n         */\n\n    }, {\n        key: 'removeFake',\n        value: function removeFake() {\n            if (this.fakeHandler) {\n                this.container.removeEventListener('click', this.fakeHandlerCallback);\n                this.fakeHandler = null;\n                this.fakeHandlerCallback = null;\n            }\n\n            if (this.fakeElem) {\n                this.container.removeChild(this.fakeElem);\n                this.fakeElem = null;\n            }\n        }\n\n        /**\n         * Selects the content from element passed on `target` property.\n         */\n\n    }, {\n        key: 'selectTarget',\n        value: function selectTarget() {\n            this.selectedText = select_default()(this.target);\n            this.copyText();\n        }\n\n        /**\n         * Executes the copy operation based on the current selection.\n         */\n\n    }, {\n        key: 'copyText',\n        value: function copyText() {\n            var succeeded = void 0;\n\n            try {\n                succeeded = document.execCommand(this.action);\n            } catch (err) {\n                succeeded = false;\n            }\n\n            this.handleResult(succeeded);\n        }\n\n        /**\n         * Fires an event based on the copy operation result.\n         * @param {Boolean} succeeded\n         */\n\n    }, {\n        key: 'handleResult',\n        value: function handleResult(succeeded) {\n            this.emitter.emit(succeeded ? 'success' : 'error', {\n                action: this.action,\n                text: this.selectedText,\n                trigger: this.trigger,\n                clearSelection: this.clearSelection.bind(this)\n            });\n        }\n\n        /**\n         * Moves focus away from `target` and back to the trigger, removes current selection.\n         */\n\n    }, {\n        key: 'clearSelection',\n        value: function clearSelection() {\n            if (this.trigger) {\n                this.trigger.focus();\n            }\n            document.activeElement.blur();\n            window.getSelection().removeAllRanges();\n        }\n\n        /**\n         * Sets the `action` to be performed which can be either 'copy' or 'cut'.\n         * @param {String} action\n         */\n\n    }, {\n        key: 'destroy',\n\n\n        /**\n         * Destroy lifecycle.\n         */\n        value: function destroy() {\n            this.removeFake();\n        }\n    }, {\n        key: 'action',\n        set: function set() {\n            var action = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'copy';\n\n            this._action = action;\n\n            if (this._action !== 'copy' && this._action !== 'cut') {\n                throw new Error('Invalid \"action\" value, use either \"copy\" or \"cut\"');\n            }\n        }\n\n        /**\n         * Gets the `action` property.\n         * @return {String}\n         */\n        ,\n        get: function get() {\n            return this._action;\n        }\n\n        /**\n         * Sets the `target` property using an element\n         * that will be have its content copied.\n         * @param {Element} target\n         */\n\n    }, {\n        key: 'target',\n        set: function set(target) {\n            if (target !== undefined) {\n                if (target && (typeof target === 'undefined' ? 'undefined' : _typeof(target)) === 'object' && target.nodeType === 1) {\n                    if (this.action === 'copy' && target.hasAttribute('disabled')) {\n                        throw new Error('Invalid \"target\" attribute. Please use \"readonly\" instead of \"disabled\" attribute');\n                    }\n\n                    if (this.action === 'cut' && (target.hasAttribute('readonly') || target.hasAttribute('disabled'))) {\n                        throw new Error('Invalid \"target\" attribute. You can\\'t cut text from elements with \"readonly\" or \"disabled\" attributes');\n                    }\n\n                    this._target = target;\n                } else {\n                    throw new Error('Invalid \"target\" value, use a valid Element');\n                }\n            }\n        }\n\n        /**\n         * Gets the `target` property.\n         * @return {String|HTMLElement}\n         */\n        ,\n        get: function get() {\n            return this._target;\n        }\n    }]);\n\n    return ClipboardAction;\n}();\n\n/* harmony default export */ var clipboard_action = (clipboard_action_ClipboardAction);\n// EXTERNAL MODULE: ./node_modules/tiny-emitter/index.js\nvar tiny_emitter = __webpack_require__(1);\nvar tiny_emitter_default = /*#__PURE__*/__webpack_require__.n(tiny_emitter);\n\n// EXTERNAL MODULE: ./node_modules/good-listener/src/listen.js\nvar listen = __webpack_require__(2);\nvar listen_default = /*#__PURE__*/__webpack_require__.n(listen);\n\n// CONCATENATED MODULE: ./src/clipboard.js\nvar clipboard_typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar clipboard_createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction clipboard_classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\n\n\n\n\n/**\n * Base class which takes one or more elements, adds event listeners to them,\n * and instantiates a new `ClipboardAction` on each click.\n */\n\nvar clipboard_Clipboard = function (_Emitter) {\n    _inherits(Clipboard, _Emitter);\n\n    /**\n     * @param {String|HTMLElement|HTMLCollection|NodeList} trigger\n     * @param {Object} options\n     */\n    function Clipboard(trigger, options) {\n        clipboard_classCallCheck(this, Clipboard);\n\n        var _this = _possibleConstructorReturn(this, (Clipboard.__proto__ || Object.getPrototypeOf(Clipboard)).call(this));\n\n        _this.resolveOptions(options);\n        _this.listenClick(trigger);\n        return _this;\n    }\n\n    /**\n     * Defines if attributes would be resolved using internal setter functions\n     * or custom functions that were passed in the constructor.\n     * @param {Object} options\n     */\n\n\n    clipboard_createClass(Clipboard, [{\n        key: 'resolveOptions',\n        value: function resolveOptions() {\n            var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n            this.action = typeof options.action === 'function' ? options.action : this.defaultAction;\n            this.target = typeof options.target === 'function' ? options.target : this.defaultTarget;\n            this.text = typeof options.text === 'function' ? options.text : this.defaultText;\n            this.container = clipboard_typeof(options.container) === 'object' ? options.container : document.body;\n        }\n\n        /**\n         * Adds a click event listener to the passed trigger.\n         * @param {String|HTMLElement|HTMLCollection|NodeList} trigger\n         */\n\n    }, {\n        key: 'listenClick',\n        value: function listenClick(trigger) {\n            var _this2 = this;\n\n            this.listener = listen_default()(trigger, 'click', function (e) {\n                return _this2.onClick(e);\n            });\n        }\n\n        /**\n         * Defines a new `ClipboardAction` on each click event.\n         * @param {Event} e\n         */\n\n    }, {\n        key: 'onClick',\n        value: function onClick(e) {\n            var trigger = e.delegateTarget || e.currentTarget;\n\n            if (this.clipboardAction) {\n                this.clipboardAction = null;\n            }\n\n            this.clipboardAction = new clipboard_action({\n                action: this.action(trigger),\n                target: this.target(trigger),\n                text: this.text(trigger),\n                container: this.container,\n                trigger: trigger,\n                emitter: this\n            });\n        }\n\n        /**\n         * Default `action` lookup function.\n         * @param {Element} trigger\n         */\n\n    }, {\n        key: 'defaultAction',\n        value: function defaultAction(trigger) {\n            return getAttributeValue('action', trigger);\n        }\n\n        /**\n         * Default `target` lookup function.\n         * @param {Element} trigger\n         */\n\n    }, {\n        key: 'defaultTarget',\n        value: function defaultTarget(trigger) {\n            var selector = getAttributeValue('target', trigger);\n\n            if (selector) {\n                return document.querySelector(selector);\n            }\n        }\n\n        /**\n         * Returns the support of the given action, or all actions if no action is\n         * given.\n         * @param {String} [action]\n         */\n\n    }, {\n        key: 'defaultText',\n\n\n        /**\n         * Default `text` lookup function.\n         * @param {Element} trigger\n         */\n        value: function defaultText(trigger) {\n            return getAttributeValue('text', trigger);\n        }\n\n        /**\n         * Destroy lifecycle.\n         */\n\n    }, {\n        key: 'destroy',\n        value: function destroy() {\n            this.listener.destroy();\n\n            if (this.clipboardAction) {\n                this.clipboardAction.destroy();\n                this.clipboardAction = null;\n            }\n        }\n    }], [{\n        key: 'isSupported',\n        value: function isSupported() {\n            var action = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : ['copy', 'cut'];\n\n            var actions = typeof action === 'string' ? [action] : action;\n            var support = !!document.queryCommandSupported;\n\n            actions.forEach(function (action) {\n                support = support && !!document.queryCommandSupported(action);\n            });\n\n            return support;\n        }\n    }]);\n\n    return Clipboard;\n}(tiny_emitter_default.a);\n\n/**\n * Helper function to retrieve attribute value.\n * @param {String} suffix\n * @param {Element} element\n */\n\n\nfunction getAttributeValue(suffix, element) {\n    var attribute = 'data-clipboard-' + suffix;\n\n    if (!element.hasAttribute(attribute)) {\n        return;\n    }\n\n    return element.getAttribute(attribute);\n}\n\n/* harmony default export */ var clipboard = __webpack_exports__[\"default\"] = (clipboard_Clipboard);\n\n/***/ })\n/******/ ])[\"default\"];\n});","import { Subject } from './Subject';\nimport { dateTimestampProvider } from './scheduler/dateTimestampProvider';\nexport class ReplaySubject extends Subject {\n    constructor(bufferSize = Infinity, windowTime = Infinity, timestampProvider = dateTimestampProvider) {\n        super();\n        this.bufferSize = bufferSize;\n        this.windowTime = windowTime;\n        this.timestampProvider = timestampProvider;\n        this.buffer = [];\n        this.infiniteTimeWindow = true;\n        this.infiniteTimeWindow = windowTime === Infinity;\n        this.bufferSize = Math.max(1, bufferSize);\n        this.windowTime = Math.max(1, windowTime);\n    }\n    next(value) {\n        const { isStopped, buffer, infiniteTimeWindow, timestampProvider, windowTime } = this;\n        if (!isStopped) {\n            buffer.push(value);\n            !infiniteTimeWindow && buffer.push(timestampProvider.now() + windowTime);\n        }\n        this.trimBuffer();\n        super.next(value);\n    }\n    _subscribe(subscriber) {\n        this._throwIfClosed();\n        this.trimBuffer();\n        const subscription = this._innerSubscribe(subscriber);\n        const { infiniteTimeWindow, buffer } = this;\n        const copy = buffer.slice();\n        for (let i = 0; i < copy.length && !subscriber.closed; i += infiniteTimeWindow ? 1 : 2) {\n            subscriber.next(copy[i]);\n        }\n        this._checkFinalizedStatuses(subscriber);\n        return subscription;\n    }\n    trimBuffer() {\n        const { bufferSize, timestampProvider, buffer, infiniteTimeWindow } = this;\n        const adjustedBufferSize = (infiniteTimeWindow ? 1 : 2) * bufferSize;\n        bufferSize < Infinity && adjustedBufferSize < buffer.length && buffer.splice(0, buffer.length - adjustedBufferSize);\n        if (!infiniteTimeWindow) {\n            const now = timestampProvider.now();\n            let last = 0;\n            for (let i = 1; i < buffer.length && buffer[i] <= now; i += 2) {\n                last = i;\n            }\n            last && buffer.splice(0, last + 1);\n        }\n    }\n}\n//# sourceMappingURL=ReplaySubject.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function mapTo(value) {\n    return operate((source, subscriber) => {\n        source.subscribe(new OperatorSubscriber(subscriber, () => subscriber.next(value)));\n    });\n}\n//# sourceMappingURL=mapTo.js.map","import { Observable } from '../Observable';\nimport { innerFrom } from './from';\nexport function defer(observableFactory) {\n    return new Observable((subscriber) => {\n        innerFrom(observableFactory()).subscribe(subscriber);\n    });\n}\n//# sourceMappingURL=defer.js.map","import { Subject } from '../Subject';\nimport { from } from '../observable/from';\nimport { operate } from '../util/lift';\nexport function share(options) {\n    options = options || {};\n    const { connector = () => new Subject(), resetOnComplete = true, resetOnError = true, resetOnRefCountZero = true } = options;\n    let connection = null;\n    let subject = null;\n    let refCount = 0;\n    let hasCompleted = false;\n    let hasErrored = false;\n    const reset = () => {\n        connection = subject = null;\n        hasCompleted = hasErrored = false;\n    };\n    return operate((source, subscriber) => {\n        refCount++;\n        if (!subject) {\n            subject = connector();\n        }\n        const castSubscription = subject.subscribe(subscriber);\n        if (!connection) {\n            connection = from(source).subscribe({\n                next: (value) => subject.next(value),\n                error: (err) => {\n                    hasErrored = true;\n                    const dest = subject;\n                    if (resetOnError) {\n                        reset();\n                    }\n                    dest.error(err);\n                },\n                complete: () => {\n                    hasCompleted = true;\n                    const dest = subject;\n                    if (resetOnComplete) {\n                        reset();\n                    }\n                    dest.complete();\n                },\n            });\n        }\n        return () => {\n            refCount--;\n            castSubscription.unsubscribe();\n            if (!refCount && resetOnRefCountZero && !hasErrored && !hasCompleted) {\n                const conn = connection;\n                reset();\n                conn === null || conn === void 0 ? void 0 : conn.unsubscribe();\n            }\n        };\n    });\n}\n//# sourceMappingURL=share.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function filter(predicate, thisArg) {\n    return operate((source, subscriber) => {\n        let index = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => predicate.call(thisArg, value, index++) && subscriber.next(value)));\n    });\n}\n//# sourceMappingURL=filter.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function distinctUntilChanged(compare, keySelector) {\n    compare = compare !== null && compare !== void 0 ? compare : defaultCompare;\n    return operate((source, subscriber) => {\n        let prev;\n        let first = true;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            ((first && ((prev = value), 1)) || !compare(prev, (prev = keySelector ? keySelector(value) : value))) &&\n                subscriber.next(value);\n            first = false;\n        }));\n    });\n}\nfunction defaultCompare(a, b) {\n    return a === b;\n}\n//# sourceMappingURL=distinctUntilChanged.js.map","/*!\n * escape-html\n * Copyright(c) 2012-2013 TJ Holowaychuk\n * Copyright(c) 2015 Andreas Lubbe\n * Copyright(c) 2015 Tiancheng \"Timothy\" Gu\n * MIT Licensed\n */\n\n'use strict';\n\n/**\n * Module variables.\n * @private\n */\n\nvar matchHtmlRegExp = /[\"'&<>]/;\n\n/**\n * Module exports.\n * @public\n */\n\nmodule.exports = escapeHtml;\n\n/**\n * Escape special characters in the given string of html.\n *\n * @param  {string} string The string to escape for inserting into HTML\n * @return {string}\n * @public\n */\n\nfunction escapeHtml(string) {\n  var str = '' + string;\n  var match = matchHtmlRegExp.exec(str);\n\n  if (!match) {\n    return str;\n  }\n\n  var escape;\n  var html = '';\n  var index = 0;\n  var lastIndex = 0;\n\n  for (index = match.index; index < str.length; index++) {\n    switch (str.charCodeAt(index)) {\n      case 34: // \"\n        escape = '&quot;';\n        break;\n      case 38: // &\n        escape = '&amp;';\n        break;\n      case 39: // '\n        escape = '&#39;';\n        break;\n      case 60: // <\n        escape = '&lt;';\n        break;\n      case 62: // >\n        escape = '&gt;';\n        break;\n      default:\n        continue;\n    }\n\n    if (lastIndex !== index) {\n      html += str.substring(lastIndex, index);\n    }\n\n    lastIndex = index + 1;\n    html += escape;\n  }\n\n  return lastIndex !== index\n    ? html + str.substring(lastIndex, index)\n    : html;\n}\n","const { isArray } = Array;\nconst { getPrototypeOf, prototype: objectProto, keys: getKeys } = Object;\nexport function argsArgArrayOrObject(args) {\n    if (args.length === 1) {\n        const first = args[0];\n        if (isArray(first)) {\n            return { args: first, keys: null };\n        }\n        if (isPOJO(first)) {\n            const keys = getKeys(first);\n            return {\n                args: keys.map((key) => first[key]),\n                keys,\n            };\n        }\n    }\n    return { args: args, keys: null };\n}\nfunction isPOJO(obj) {\n    return obj && typeof obj === 'object' && getPrototypeOf(obj) === objectProto;\n}\n//# sourceMappingURL=argsArgArrayOrObject.js.map","import { Observable } from '../Observable';\nimport { argsArgArrayOrObject } from '../util/argsArgArrayOrObject';\nimport { Subscriber } from '../Subscriber';\nimport { from } from './from';\nimport { identity } from '../util/identity';\nimport { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';\nimport { popResultSelector, popScheduler } from '../util/args';\nexport function combineLatest(...args) {\n    const scheduler = popScheduler(args);\n    const resultSelector = popResultSelector(args);\n    const { args: observables, keys } = argsArgArrayOrObject(args);\n    if (observables.length === 0) {\n        return from([], scheduler);\n    }\n    const result = new Observable(combineLatestInit(observables, scheduler, keys\n        ?\n            (values) => {\n                const value = {};\n                for (let i = 0; i < values.length; i++) {\n                    value[keys[i]] = values[i];\n                }\n                return value;\n            }\n        :\n            identity));\n    if (resultSelector) {\n        return result.pipe(mapOneOrManyArgs(resultSelector));\n    }\n    return result;\n}\nclass CombineLatestSubscriber extends Subscriber {\n    constructor(destination, _next, shouldComplete) {\n        super(destination);\n        this._next = _next;\n        this.shouldComplete = shouldComplete;\n    }\n    _complete() {\n        if (this.shouldComplete()) {\n            super._complete();\n        }\n        else {\n            this.unsubscribe();\n        }\n    }\n}\nexport function combineLatestInit(observables, scheduler, valueTransform = identity) {\n    return (subscriber) => {\n        const primarySubscribe = () => {\n            const { length } = observables;\n            const values = new Array(length);\n            let active = length;\n            const hasValues = observables.map(() => false);\n            let waitingForFirstValues = true;\n            const emit = () => subscriber.next(valueTransform(values.slice()));\n            for (let i = 0; i < length; i++) {\n                const subscribe = () => {\n                    const source = from(observables[i], scheduler);\n                    source.subscribe(new CombineLatestSubscriber(subscriber, (value) => {\n                        values[i] = value;\n                        if (waitingForFirstValues) {\n                            hasValues[i] = true;\n                            waitingForFirstValues = !hasValues.every(identity);\n                        }\n                        if (!waitingForFirstValues) {\n                            emit();\n                        }\n                    }, () => --active === 0));\n                };\n                maybeSchedule(scheduler, subscribe, subscriber);\n            }\n        };\n        maybeSchedule(scheduler, primarySubscribe, subscriber);\n    };\n}\nfunction maybeSchedule(scheduler, execute, subscription) {\n    if (scheduler) {\n        subscription.add(scheduler.schedule(execute));\n    }\n    else {\n        execute();\n    }\n}\n//# sourceMappingURL=combineLatest.js.map","(function (global, factory) {\n  typeof exports === 'object' && typeof module !== 'undefined' ? factory() :\n  typeof define === 'function' && define.amd ? define(factory) :\n  (factory());\n}(this, (function () { 'use strict';\n\n  /**\n   * Applies the :focus-visible polyfill at the given scope.\n   * A scope in this case is either the top-level Document or a Shadow Root.\n   *\n   * @param {(Document|ShadowRoot)} scope\n   * @see https://github.com/WICG/focus-visible\n   */\n  function applyFocusVisiblePolyfill(scope) {\n    var hadKeyboardEvent = true;\n    var hadFocusVisibleRecently = false;\n    var hadFocusVisibleRecentlyTimeout = null;\n\n    var inputTypesAllowlist = {\n      text: true,\n      search: true,\n      url: true,\n      tel: true,\n      email: true,\n      password: true,\n      number: true,\n      date: true,\n      month: true,\n      week: true,\n      time: true,\n      datetime: true,\n      'datetime-local': true\n    };\n\n    /**\n     * Helper function for legacy browsers and iframes which sometimes focus\n     * elements like document, body, and non-interactive SVG.\n     * @param {Element} el\n     */\n    function isValidFocusTarget(el) {\n      if (\n        el &&\n        el !== document &&\n        el.nodeName !== 'HTML' &&\n        el.nodeName !== 'BODY' &&\n        'classList' in el &&\n        'contains' in el.classList\n      ) {\n        return true;\n      }\n      return false;\n    }\n\n    /**\n     * Computes whether the given element should automatically trigger the\n     * `focus-visible` class being added, i.e. whether it should always match\n     * `:focus-visible` when focused.\n     * @param {Element} el\n     * @return {boolean}\n     */\n    function focusTriggersKeyboardModality(el) {\n      var type = el.type;\n      var tagName = el.tagName;\n\n      if (tagName === 'INPUT' && inputTypesAllowlist[type] && !el.readOnly) {\n        return true;\n      }\n\n      if (tagName === 'TEXTAREA' && !el.readOnly) {\n        return true;\n      }\n\n      if (el.isContentEditable) {\n        return true;\n      }\n\n      return false;\n    }\n\n    /**\n     * Add the `focus-visible` class to the given element if it was not added by\n     * the author.\n     * @param {Element} el\n     */\n    function addFocusVisibleClass(el) {\n      if (el.classList.contains('focus-visible')) {\n        return;\n      }\n      el.classList.add('focus-visible');\n      el.setAttribute('data-focus-visible-added', '');\n    }\n\n    /**\n     * Remove the `focus-visible` class from the given element if it was not\n     * originally added by the author.\n     * @param {Element} el\n     */\n    function removeFocusVisibleClass(el) {\n      if (!el.hasAttribute('data-focus-visible-added')) {\n        return;\n      }\n      el.classList.remove('focus-visible');\n      el.removeAttribute('data-focus-visible-added');\n    }\n\n    /**\n     * If the most recent user interaction was via the keyboard;\n     * and the key press did not include a meta, alt/option, or control key;\n     * then the modality is keyboard. Otherwise, the modality is not keyboard.\n     * Apply `focus-visible` to any current active element and keep track\n     * of our keyboard modality state with `hadKeyboardEvent`.\n     * @param {KeyboardEvent} e\n     */\n    function onKeyDown(e) {\n      if (e.metaKey || e.altKey || e.ctrlKey) {\n        return;\n      }\n\n      if (isValidFocusTarget(scope.activeElement)) {\n        addFocusVisibleClass(scope.activeElement);\n      }\n\n      hadKeyboardEvent = true;\n    }\n\n    /**\n     * If at any point a user clicks with a pointing device, ensure that we change\n     * the modality away from keyboard.\n     * This avoids the situation where a user presses a key on an already focused\n     * element, and then clicks on a different element, focusing it with a\n     * pointing device, while we still think we're in keyboard modality.\n     * @param {Event} e\n     */\n    function onPointerDown(e) {\n      hadKeyboardEvent = false;\n    }\n\n    /**\n     * On `focus`, add the `focus-visible` class to the target if:\n     * - the target received focus as a result of keyboard navigation, or\n     * - the event target is an element that will likely require interaction\n     *   via the keyboard (e.g. a text box)\n     * @param {Event} e\n     */\n    function onFocus(e) {\n      // Prevent IE from focusing the document or HTML element.\n      if (!isValidFocusTarget(e.target)) {\n        return;\n      }\n\n      if (hadKeyboardEvent || focusTriggersKeyboardModality(e.target)) {\n        addFocusVisibleClass(e.target);\n      }\n    }\n\n    /**\n     * On `blur`, remove the `focus-visible` class from the target.\n     * @param {Event} e\n     */\n    function onBlur(e) {\n      if (!isValidFocusTarget(e.target)) {\n        return;\n      }\n\n      if (\n        e.target.classList.contains('focus-visible') ||\n        e.target.hasAttribute('data-focus-visible-added')\n      ) {\n        // To detect a tab/window switch, we look for a blur event followed\n        // rapidly by a visibility change.\n        // If we don't see a visibility change within 100ms, it's probably a\n        // regular focus change.\n        hadFocusVisibleRecently = true;\n        window.clearTimeout(hadFocusVisibleRecentlyTimeout);\n        hadFocusVisibleRecentlyTimeout = window.setTimeout(function() {\n          hadFocusVisibleRecently = false;\n        }, 100);\n        removeFocusVisibleClass(e.target);\n      }\n    }\n\n    /**\n     * If the user changes tabs, keep track of whether or not the previously\n     * focused element had .focus-visible.\n     * @param {Event} e\n     */\n    function onVisibilityChange(e) {\n      if (document.visibilityState === 'hidden') {\n        // If the tab becomes active again, the browser will handle calling focus\n        // on the element (Safari actually calls it twice).\n        // If this tab change caused a blur on an element with focus-visible,\n        // re-apply the class when the user switches back to the tab.\n        if (hadFocusVisibleRecently) {\n          hadKeyboardEvent = true;\n        }\n        addInitialPointerMoveListeners();\n      }\n    }\n\n    /**\n     * Add a group of listeners to detect usage of any pointing devices.\n     * These listeners will be added when the polyfill first loads, and anytime\n     * the window is blurred, so that they are active when the window regains\n     * focus.\n     */\n    function addInitialPointerMoveListeners() {\n      document.addEventListener('mousemove', onInitialPointerMove);\n      document.addEventListener('mousedown', onInitialPointerMove);\n      document.addEventListener('mouseup', onInitialPointerMove);\n      document.addEventListener('pointermove', onInitialPointerMove);\n      document.addEventListener('pointerdown', onInitialPointerMove);\n      document.addEventListener('pointerup', onInitialPointerMove);\n      document.addEventListener('touchmove', onInitialPointerMove);\n      document.addEventListener('touchstart', onInitialPointerMove);\n      document.addEventListener('touchend', onInitialPointerMove);\n    }\n\n    function removeInitialPointerMoveListeners() {\n      document.removeEventListener('mousemove', onInitialPointerMove);\n      document.removeEventListener('mousedown', onInitialPointerMove);\n      document.removeEventListener('mouseup', onInitialPointerMove);\n      document.removeEventListener('pointermove', onInitialPointerMove);\n      document.removeEventListener('pointerdown', onInitialPointerMove);\n      document.removeEventListener('pointerup', onInitialPointerMove);\n      document.removeEventListener('touchmove', onInitialPointerMove);\n      document.removeEventListener('touchstart', onInitialPointerMove);\n      document.removeEventListener('touchend', onInitialPointerMove);\n    }\n\n    /**\n     * When the polfyill first loads, assume the user is in keyboard modality.\n     * If any event is received from a pointing device (e.g. mouse, pointer,\n     * touch), turn off keyboard modality.\n     * This accounts for situations where focus enters the page from the URL bar.\n     * @param {Event} e\n     */\n    function onInitialPointerMove(e) {\n      // Work around a Safari quirk that fires a mousemove on <html> whenever the\n      // window blurs, even if you're tabbing out of the page. ¯\\_(ツ)_/¯\n      if (e.target.nodeName && e.target.nodeName.toLowerCase() === 'html') {\n        return;\n      }\n\n      hadKeyboardEvent = false;\n      removeInitialPointerMoveListeners();\n    }\n\n    // For some kinds of state, we are interested in changes at the global scope\n    // only. For example, global pointer input, global key presses and global\n    // visibility change should affect the state at every scope:\n    document.addEventListener('keydown', onKeyDown, true);\n    document.addEventListener('mousedown', onPointerDown, true);\n    document.addEventListener('pointerdown', onPointerDown, true);\n    document.addEventListener('touchstart', onPointerDown, true);\n    document.addEventListener('visibilitychange', onVisibilityChange, true);\n\n    addInitialPointerMoveListeners();\n\n    // For focus and blur, we specifically care about state changes in the local\n    // scope. This is because focus / blur events that originate from within a\n    // shadow root are not re-dispatched from the host element if it was already\n    // the active element in its own scope:\n    scope.addEventListener('focus', onFocus, true);\n    scope.addEventListener('blur', onBlur, true);\n\n    // We detect that a node is a ShadowRoot by ensuring that it is a\n    // DocumentFragment and also has a host property. This check covers native\n    // implementation and polyfill implementation transparently. If we only cared\n    // about the native implementation, we could just check if the scope was\n    // an instance of a ShadowRoot.\n    if (scope.nodeType === Node.DOCUMENT_FRAGMENT_NODE && scope.host) {\n      // Since a ShadowRoot is a special kind of DocumentFragment, it does not\n      // have a root element to add a class to. So, we add this attribute to the\n      // host element instead:\n      scope.host.setAttribute('data-js-focus-visible', '');\n    } else if (scope.nodeType === Node.DOCUMENT_NODE) {\n      document.documentElement.classList.add('js-focus-visible');\n      document.documentElement.setAttribute('data-js-focus-visible', '');\n    }\n  }\n\n  // It is important to wrap all references to global window and document in\n  // these checks to support server-side rendering use cases\n  // @see https://github.com/WICG/focus-visible/issues/199\n  if (typeof window !== 'undefined' && typeof document !== 'undefined') {\n    // Make the polyfill helper globally available. This can be used as a signal\n    // to interested libraries that wish to coordinate with the polyfill for e.g.,\n    // applying the polyfill to a shadow root:\n    window.applyFocusVisiblePolyfill = applyFocusVisiblePolyfill;\n\n    // Notify interested libraries of the polyfill's presence, in case the\n    // polyfill was loaded lazily:\n    var event;\n\n    try {\n      event = new CustomEvent('focus-visible-polyfill-ready');\n    } catch (error) {\n      // IE11 does not support using CustomEvent as a constructor directly:\n      event = document.createEvent('CustomEvent');\n      event.initCustomEvent('focus-visible-polyfill-ready', false, false, {});\n    }\n\n    window.dispatchEvent(event);\n  }\n\n  if (typeof document !== 'undefined') {\n    // Apply the polyfill to the global document, so that no JavaScript\n    // coordination is required to use the polyfill in the top-level document:\n    applyFocusVisiblePolyfill(document);\n  }\n\n})));\n","import { Observable } from '../Observable';\nimport { mergeMap } from '../operators/mergeMap';\nimport { isArrayLike } from '../util/isArrayLike';\nimport { isFunction } from '../util/isFunction';\nimport { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';\nimport { internalFromArray } from './fromArray';\nconst nodeEventEmitterMethods = ['addListener', 'removeListener'];\nconst eventTargetMethods = ['addEventListener', 'removeEventListener'];\nconst jqueryMethods = ['on', 'off'];\nexport function fromEvent(target, eventName, options, resultSelector) {\n    if (isFunction(options)) {\n        resultSelector = options;\n        options = undefined;\n    }\n    if (resultSelector) {\n        return fromEvent(target, eventName, options).pipe(mapOneOrManyArgs(resultSelector));\n    }\n    const [add, remove] = isEventTarget(target)\n        ? eventTargetMethods.map((methodName) => (handler) => target[methodName](eventName, handler, options))\n        :\n            isNodeStyleEventEmitter(target)\n                ? nodeEventEmitterMethods.map(toCommonHandlerRegistry(target, eventName))\n                : isJQueryStyleEventEmitter(target)\n                    ? jqueryMethods.map(toCommonHandlerRegistry(target, eventName))\n                    : [];\n    if (!add) {\n        if (isArrayLike(target)) {\n            return mergeMap((subTarget) => fromEvent(subTarget, eventName, options))(internalFromArray(target));\n        }\n    }\n    return new Observable((subscriber) => {\n        if (!add) {\n            throw new TypeError('Invalid event target');\n        }\n        const handler = (...args) => subscriber.next(1 < args.length ? args : args[0]);\n        add(handler);\n        return () => remove(handler);\n    });\n}\nfunction toCommonHandlerRegistry(target, eventName) {\n    return (methodName) => (handler) => target[methodName](eventName, handler);\n}\nfunction isNodeStyleEventEmitter(target) {\n    return isFunction(target.addListener) && isFunction(target.removeListener);\n}\nfunction isJQueryStyleEventEmitter(target) {\n    return isFunction(target.on) && isFunction(target.off);\n}\nfunction isEventTarget(target) {\n    return isFunction(target.addEventListener) && isFunction(target.removeEventListener);\n}\n//# sourceMappingURL=fromEvent.js.map","import { mergeAll } from '../operators/mergeAll';\nimport { internalFromArray } from './fromArray';\nimport { argsOrArgArray } from '../util/argsOrArgArray';\nimport { innerFrom } from './from';\nimport { EMPTY } from './empty';\nimport { popNumber, popScheduler } from '../util/args';\nexport function merge(...args) {\n    const scheduler = popScheduler(args);\n    const concurrent = popNumber(args, Infinity);\n    const sources = argsOrArgArray(args);\n    return !sources.length\n        ?\n            EMPTY\n        : sources.length === 1\n            ?\n                innerFrom(sources[0])\n            :\n                mergeAll(concurrent)(internalFromArray(sources, scheduler));\n}\n//# sourceMappingURL=merge.js.map","import { concat } from '../observable/concat';\nimport { popScheduler } from '../util/args';\nimport { operate } from '../util/lift';\nexport function startWith(...values) {\n    const scheduler = popScheduler(values);\n    return operate((source, subscriber) => {\n        (scheduler ? concat(values, source, scheduler) : concat(values, source)).subscribe(subscriber);\n    });\n}\n//# sourceMappingURL=startWith.js.map","import { internalFromArray } from './fromArray';\nimport { scheduleArray } from '../scheduled/scheduleArray';\nimport { popScheduler } from '../util/args';\nexport function of(...args) {\n    const scheduler = popScheduler(args);\n    return scheduler ? scheduleArray(args, scheduler) : internalFromArray(args);\n}\n//# sourceMappingURL=of.js.map","import { Observable } from '../Observable';\nimport { noop } from '../util/noop';\nexport const NEVER = new Observable(noop);\nexport function never() {\n    return NEVER;\n}\n//# sourceMappingURL=never.js.map","import { operate } from '../util/lift';\nexport function finalize(callback) {\n    return operate((source, subscriber) => {\n        source.subscribe(subscriber);\n        subscriber.add(callback);\n    });\n}\n//# sourceMappingURL=finalize.js.map","import { ReplaySubject } from '../ReplaySubject';\nimport { share } from './share';\nexport function shareReplay(configOrBufferSize, windowTime, scheduler) {\n    var _a, _b;\n    let bufferSize;\n    let refCount = false;\n    if (configOrBufferSize && typeof configOrBufferSize === 'object') {\n        bufferSize = (_a = configOrBufferSize.bufferSize) !== null && _a !== void 0 ? _a : Infinity;\n        windowTime = (_b = configOrBufferSize.windowTime) !== null && _b !== void 0 ? _b : Infinity;\n        refCount = !!configOrBufferSize.refCount;\n        scheduler = configOrBufferSize.scheduler;\n    }\n    else {\n        bufferSize = configOrBufferSize !== null && configOrBufferSize !== void 0 ? configOrBufferSize : Infinity;\n    }\n    return share({\n        connector: () => new ReplaySubject(bufferSize, windowTime, scheduler),\n        resetOnError: true,\n        resetOnComplete: false,\n        resetOnRefCountZero: refCount\n    });\n}\n//# sourceMappingURL=shareReplay.js.map","import { isFunction } from '../util/isFunction';\nimport { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { identity } from '../util/identity';\nexport function tap(observerOrNext, error, complete) {\n    const tapObserver = isFunction(observerOrNext) || error || complete ? { next: observerOrNext, error, complete } : observerOrNext;\n    return tapObserver\n        ? operate((source, subscriber) => {\n            source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n                var _a;\n                (_a = tapObserver.next) === null || _a === void 0 ? void 0 : _a.call(tapObserver, value);\n                subscriber.next(value);\n            }, (err) => {\n                var _a;\n                (_a = tapObserver.error) === null || _a === void 0 ? void 0 : _a.call(tapObserver, err);\n                subscriber.error(err);\n            }, () => {\n                var _a;\n                (_a = tapObserver.complete) === null || _a === void 0 ? void 0 : _a.call(tapObserver);\n                subscriber.complete();\n            }));\n        })\n        :\n            identity;\n}\n//# sourceMappingURL=tap.js.map","import { Subject } from './Subject';\nexport class BehaviorSubject extends Subject {\n    constructor(_value) {\n        super();\n        this._value = _value;\n    }\n    get value() {\n        return this.getValue();\n    }\n    _subscribe(subscriber) {\n        const subscription = super._subscribe(subscriber);\n        !subscription.closed && subscriber.next(this._value);\n        return subscription;\n    }\n    getValue() {\n        const { hasError, thrownError, _value } = this;\n        if (hasError) {\n            throw thrownError;\n        }\n        this._throwIfClosed();\n        return _value;\n    }\n    next(value) {\n        super.next((this._value = value));\n    }\n}\n//# sourceMappingURL=BehaviorSubject.js.map","import { distinctUntilChanged } from './distinctUntilChanged';\nexport function distinctUntilKeyChanged(key, compare) {\n    return distinctUntilChanged((x, y) => compare ? compare(x[key], y[key]) : x[key] === y[key]);\n}\n//# sourceMappingURL=distinctUntilKeyChanged.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nexport const defaultThrottleConfig = {\n    leading: true,\n    trailing: false,\n};\nexport function throttle(durationSelector, { leading, trailing } = defaultThrottleConfig) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        let sendValue = null;\n        let throttled = null;\n        let isComplete = false;\n        const endThrottling = () => {\n            throttled === null || throttled === void 0 ? void 0 : throttled.unsubscribe();\n            throttled = null;\n            if (trailing) {\n                send();\n                isComplete && subscriber.complete();\n            }\n        };\n        const cleanupThrottling = () => {\n            throttled = null;\n            isComplete && subscriber.complete();\n        };\n        const startThrottle = (value) => (throttled = innerFrom(durationSelector(value)).subscribe(new OperatorSubscriber(subscriber, endThrottling, undefined, cleanupThrottling)));\n        const send = () => {\n            if (hasValue) {\n                subscriber.next(sendValue);\n                !isComplete && startThrottle(sendValue);\n            }\n            hasValue = false;\n            sendValue = null;\n        };\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            hasValue = true;\n            sendValue = value;\n            !(throttled && !throttled.closed) && (leading ? send() : startThrottle(value));\n        }, undefined, () => {\n            isComplete = true;\n            !(trailing && hasValue && throttled && !throttled.closed) && subscriber.complete();\n        }));\n    });\n}\n//# sourceMappingURL=throttle.js.map","import { switchMap } from './switchMap';\nexport function switchMapTo(innerObservable, resultSelector) {\n    return resultSelector ? switchMap(() => innerObservable, resultSelector) : switchMap(() => innerObservable);\n}\n//# sourceMappingURL=switchMapTo.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function observeOn(scheduler, delay = 0) {\n    return operate((source, subscriber) => {\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => subscriber.add(scheduler.schedule(() => subscriber.next(value), delay)), (err) => subscriber.add(scheduler.schedule(() => subscriber.error(err), delay)), () => subscriber.add(scheduler.schedule(() => subscriber.complete(), delay))));\n    });\n}\n//# sourceMappingURL=observeOn.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nimport { identity } from '../util/identity';\nimport { noop } from '../util/noop';\nimport { popResultSelector } from '../util/args';\nexport function withLatestFrom(...inputs) {\n    const project = popResultSelector(inputs);\n    return operate((source, subscriber) => {\n        const len = inputs.length;\n        const otherValues = new Array(len);\n        let hasValue = inputs.map(() => false);\n        let ready = false;\n        for (let i = 0; i < len; i++) {\n            innerFrom(inputs[i]).subscribe(new OperatorSubscriber(subscriber, (value) => {\n                otherValues[i] = value;\n                if (!ready && !hasValue[i]) {\n                    hasValue[i] = true;\n                    (ready = hasValue.every(identity)) && (hasValue = null);\n                }\n            }, undefined, noop));\n        }\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            if (ready) {\n                const values = [value, ...otherValues];\n                subscriber.next(project ? project(...values) : values);\n            }\n        }));\n    });\n}\n//# sourceMappingURL=withLatestFrom.js.map","import { operate } from '../util/lift';\nimport { noop } from '../util/noop';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function sample(notifier) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        let lastValue = null;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            hasValue = true;\n            lastValue = value;\n        }));\n        const emit = () => {\n            if (hasValue) {\n                hasValue = false;\n                const value = lastValue;\n                lastValue = null;\n                subscriber.next(value);\n            }\n        };\n        notifier.subscribe(new OperatorSubscriber(subscriber, emit, undefined, noop));\n    });\n}\n//# sourceMappingURL=sample.js.map","import { filter } from './filter';\nexport function skip(count) {\n    return filter((_, index) => count <= index);\n}\n//# sourceMappingURL=skip.js.map","import { innerFrom } from '../observable/from';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { operate } from '../util/lift';\nexport function catchError(selector) {\n    return operate((source, subscriber) => {\n        let innerSub = null;\n        let syncUnsub = false;\n        let handledResult;\n        innerSub = source.subscribe(new OperatorSubscriber(subscriber, undefined, (err) => {\n            handledResult = innerFrom(selector(err, catchError(selector)(source)));\n            if (innerSub) {\n                innerSub.unsubscribe();\n                innerSub = null;\n                handledResult.subscribe(subscriber);\n            }\n            else {\n                syncUnsub = true;\n            }\n        }));\n        if (syncUnsub) {\n            innerSub.unsubscribe();\n            innerSub = null;\n            handledResult.subscribe(subscriber);\n        }\n    });\n}\n//# sourceMappingURL=catchError.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { arrRemove } from '../util/arrRemove';\nexport function bufferCount(bufferSize, startBufferEvery = null) {\n    startBufferEvery = startBufferEvery !== null && startBufferEvery !== void 0 ? startBufferEvery : bufferSize;\n    return operate((source, subscriber) => {\n        let buffers = [];\n        let count = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            let toEmit = null;\n            if (count++ % startBufferEvery === 0) {\n                buffers.push([]);\n            }\n            for (const buffer of buffers) {\n                buffer.push(value);\n                if (bufferSize <= buffer.length) {\n                    toEmit = toEmit !== null && toEmit !== void 0 ? toEmit : [];\n                    toEmit.push(buffer);\n                }\n            }\n            if (toEmit) {\n                for (const buffer of toEmit) {\n                    arrRemove(buffers, buffer);\n                    subscriber.next(buffer);\n                }\n            }\n        }, undefined, () => {\n            for (const buffer of buffers) {\n                subscriber.next(buffer);\n            }\n            subscriber.complete();\n        }, () => {\n            buffers = null;\n        }));\n    });\n}\n//# sourceMappingURL=bufferCount.js.map","import { mergeMap } from './mergeMap';\nimport { isFunction } from '../util/isFunction';\nexport function concatMap(project, resultSelector) {\n    return isFunction(resultSelector) ? mergeMap(project, resultSelector, 1) : mergeMap(project, 1);\n}\n//# sourceMappingURL=concatMap.js.map","import { defer } from './defer';\nexport function iif(condition, trueResult, falseResult) {\n    return defer(() => (condition() ? trueResult : falseResult));\n}\n//# sourceMappingURL=iif.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nexport function defaultIfEmpty(defaultValue = null) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            hasValue = true;\n            subscriber.next(value);\n        }, undefined, () => {\n            if (!hasValue) {\n                subscriber.next(defaultValue);\n            }\n            subscriber.complete();\n        }));\n    });\n}\n//# sourceMappingURL=defaultIfEmpty.js.map","import { combineLatestInit } from '../observable/combineLatest';\nimport { operate } from '../util/lift';\nimport { argsOrArgArray } from '../util/argsOrArgArray';\nimport { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';\nimport { pipe } from '../util/pipe';\nimport { popResultSelector } from '../util/args';\nexport function combineLatest(...args) {\n    const resultSelector = popResultSelector(args);\n    return resultSelector\n        ? pipe(combineLatest(...args), mapOneOrManyArgs(resultSelector))\n        : operate((source, subscriber) => {\n            combineLatestInit([source, ...argsOrArgArray(args)])(subscriber);\n        });\n}\nexport function combineLatestWith(...otherSources) {\n    return combineLatest(...otherSources);\n}\n//# sourceMappingURL=combineLatestWith.js.map","import { Subscription } from '../Subscription';\nexport const animationFrameProvider = {\n    schedule(callback) {\n        let request = requestAnimationFrame;\n        let cancel = cancelAnimationFrame;\n        const { delegate } = animationFrameProvider;\n        if (delegate) {\n            request = delegate.requestAnimationFrame;\n            cancel = delegate.cancelAnimationFrame;\n        }\n        const handle = request((timestamp) => {\n            cancel = undefined;\n            callback(timestamp);\n        });\n        return new Subscription(() => cancel === null || cancel === void 0 ? void 0 : cancel(handle));\n    },\n    requestAnimationFrame(...args) {\n        const { delegate } = animationFrameProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.requestAnimationFrame) || requestAnimationFrame)(...args);\n    },\n    cancelAnimationFrame(...args) {\n        const { delegate } = animationFrameProvider;\n        return ((delegate === null || delegate === void 0 ? void 0 : delegate.cancelAnimationFrame) || cancelAnimationFrame)(...args);\n    },\n    delegate: undefined,\n};\n//# sourceMappingURL=animationFrameProvider.js.map","import { AsyncAction } from './AsyncAction';\nimport { animationFrameProvider } from './animationFrameProvider';\nexport class AnimationFrameAction extends AsyncAction {\n    constructor(scheduler, work) {\n        super(scheduler, work);\n        this.scheduler = scheduler;\n        this.work = work;\n    }\n    requestAsyncId(scheduler, id, delay = 0) {\n        if (delay !== null && delay > 0) {\n            return super.requestAsyncId(scheduler, id, delay);\n        }\n        scheduler.actions.push(this);\n        return scheduler.scheduled || (scheduler.scheduled = animationFrameProvider.requestAnimationFrame(() => scheduler.flush(undefined)));\n    }\n    recycleAsyncId(scheduler, id, delay = 0) {\n        if ((delay != null && delay > 0) || (delay == null && this.delay > 0)) {\n            return super.recycleAsyncId(scheduler, id, delay);\n        }\n        if (scheduler.actions.length === 0) {\n            animationFrameProvider.cancelAnimationFrame(id);\n            scheduler.scheduled = undefined;\n        }\n        return undefined;\n    }\n}\n//# sourceMappingURL=AnimationFrameAction.js.map","import { AsyncScheduler } from './AsyncScheduler';\nexport class AnimationFrameScheduler extends AsyncScheduler {\n    flush(action) {\n        this.active = true;\n        this.scheduled = undefined;\n        const { actions } = this;\n        let error;\n        let index = -1;\n        action = action || actions.shift();\n        const count = actions.length;\n        do {\n            if (error = action.execute(action.state, action.delay)) {\n                break;\n            }\n        } while (++index < count && (action = actions.shift()));\n        this.active = false;\n        if (error) {\n            while (++index < count && (action = actions.shift())) {\n                action.unsubscribe();\n            }\n            throw error;\n        }\n    }\n}\n//# sourceMappingURL=AnimationFrameScheduler.js.map","import { AnimationFrameAction } from './AnimationFrameAction';\nimport { AnimationFrameScheduler } from './AnimationFrameScheduler';\nexport const animationFrameScheduler = new AnimationFrameScheduler(AnimationFrameAction);\nexport const animationFrame = animationFrameScheduler;\n//# sourceMappingURL=animationFrame.js.map","import { concat } from '../observable/concat';\nimport { take } from './take';\nimport { ignoreElements } from './ignoreElements';\nimport { mapTo } from './mapTo';\nimport { mergeMap } from './mergeMap';\nexport function delayWhen(delayDurationSelector, subscriptionDelay) {\n    if (subscriptionDelay) {\n        return (source) => concat(subscriptionDelay.pipe(take(1), ignoreElements()), source.pipe(delayWhen(delayDurationSelector)));\n    }\n    return mergeMap((value, index) => delayDurationSelector(value, index).pipe(take(1), mapTo(value)));\n}\n//# sourceMappingURL=delayWhen.js.map","import { operate } from '../util/lift';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { noop } from '../util/noop';\nexport function ignoreElements() {\n    return operate((source, subscriber) => {\n        source.subscribe(new OperatorSubscriber(subscriber, noop));\n    });\n}\n//# sourceMappingURL=ignoreElements.js.map","import { asyncScheduler } from '../scheduler/async';\nimport { delayWhen } from './delayWhen';\nimport { timer } from '../observable/timer';\nexport function delay(due, scheduler = asyncScheduler) {\n    const duration = timer(due, scheduler);\n    return delayWhen(() => duration);\n}\n//# sourceMappingURL=delay.js.map","import { OperatorSubscriber } from './OperatorSubscriber';\nexport function scanInternals(accumulator, seed, hasSeed, emitOnNext, emitBeforeComplete) {\n    return (source, subscriber) => {\n        let hasState = hasSeed;\n        let state = seed;\n        let index = 0;\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            const i = index++;\n            state = hasState\n                ?\n                    accumulator(state, value, i)\n                :\n                    ((hasState = true), value);\n            emitOnNext && subscriber.next(state);\n        }, undefined, emitBeforeComplete &&\n            (() => {\n                hasState && subscriber.next(state);\n                subscriber.complete();\n            })));\n    };\n}\n//# sourceMappingURL=scanInternals.js.map","import { operate } from '../util/lift';\nimport { scanInternals } from './scanInternals';\nexport function scan(accumulator, seed) {\n    return operate(scanInternals(accumulator, seed, arguments.length >= 2, true));\n}\n//# sourceMappingURL=scan.js.map","import { zip as zipStatic } from '../observable/zip';\nimport { operate } from '../util/lift';\nexport function zip(...sources) {\n    return operate((source, subscriber) => {\n        zipStatic(source, ...sources).subscribe(subscriber);\n    });\n}\nexport function zipWith(...otherInputs) {\n    return zip(...otherInputs);\n}\n//# sourceMappingURL=zipWith.js.map","import { Observable } from '../Observable';\nimport { innerFrom } from './from';\nimport { argsOrArgArray } from '../util/argsOrArgArray';\nimport { EMPTY } from './empty';\nimport { OperatorSubscriber } from '../operators/OperatorSubscriber';\nimport { popResultSelector } from '../util/args';\nexport function zip(...args) {\n    const resultSelector = popResultSelector(args);\n    const sources = argsOrArgArray(args);\n    return sources.length\n        ? new Observable((subscriber) => {\n            let buffers = sources.map(() => []);\n            let completed = sources.map(() => false);\n            subscriber.add(() => {\n                buffers = completed = null;\n            });\n            for (let sourceIndex = 0; !subscriber.closed && sourceIndex < sources.length; sourceIndex++) {\n                innerFrom(sources[sourceIndex]).subscribe(new OperatorSubscriber(subscriber, (value) => {\n                    buffers[sourceIndex].push(value);\n                    if (buffers.every((buffer) => buffer.length)) {\n                        const result = buffers.map((buffer) => buffer.shift());\n                        subscriber.next(resultSelector ? resultSelector(...result) : result);\n                        if (buffers.some((buffer, i) => !buffer.length && completed[i])) {\n                            subscriber.complete();\n                        }\n                    }\n                }, undefined, () => {\n                    completed[sourceIndex] = true;\n                    !buffers[sourceIndex].length && subscriber.complete();\n                }));\n            }\n            return () => {\n                buffers = completed = null;\n            };\n        })\n        : EMPTY;\n}\n//# sourceMappingURL=zip.js.map","import { asyncScheduler } from '../scheduler/async';\nimport { debounce } from './debounce';\nimport { timer } from '../observable/timer';\nexport function debounceTime(dueTime, scheduler = asyncScheduler) {\n    const duration = timer(dueTime, scheduler);\n    return debounce(() => duration);\n}\n//# sourceMappingURL=debounceTime.js.map","import { operate } from '../util/lift';\nimport { noop } from '../util/noop';\nimport { OperatorSubscriber } from './OperatorSubscriber';\nimport { innerFrom } from '../observable/from';\nexport function debounce(durationSelector) {\n    return operate((source, subscriber) => {\n        let hasValue = false;\n        let lastValue = null;\n        let durationSubscriber = null;\n        const emit = () => {\n            durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();\n            durationSubscriber = null;\n            if (hasValue) {\n                hasValue = false;\n                const value = lastValue;\n                lastValue = null;\n                subscriber.next(value);\n            }\n        };\n        source.subscribe(new OperatorSubscriber(subscriber, (value) => {\n            durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();\n            hasValue = true;\n            lastValue = value;\n            durationSubscriber = new OperatorSubscriber(subscriber, emit, undefined, noop);\n            innerFrom(durationSelector(value)).subscribe(durationSubscriber);\n        }, undefined, () => {\n            emit();\n            subscriber.complete();\n        }, () => {\n            lastValue = durationSubscriber = null;\n        }));\n    });\n}\n//# sourceMappingURL=debounce.js.map"],"sourceRoot":""}
\ No newline at end of file
diff --git a/faq/faq/index.html b/faq/faq/index.html
index 614b61bd..741e2726 100644
--- a/faq/faq/index.html
+++ b/faq/faq/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/faq/faq/">
       
       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -764,8 +764,8 @@
       
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-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
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diff --git a/faq/v1vsv3-comparison/index.html b/faq/v1vsv3-comparison/index.html
index 98f8ed51..aa0e36da 100644
--- a/faq/v1vsv3-comparison/index.html
+++ b/faq/v1vsv3-comparison/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/faq/v1vsv3-comparison/">
       
       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -683,8 +683,8 @@
       
     </div>
     
-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/index.html b/index.html
index c8d8f0e8..19dd1315 100644
--- a/index.html
+++ b/index.html
@@ -14,7 +14,7 @@
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       <link rel="shortcut icon" href="static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -787,8 +787,8 @@
       
     </div>
     
-      <script src="assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/internals/defaults/index.html b/internals/defaults/index.html
index 7a066699..bde810d6 100644
--- a/internals/defaults/index.html
+++ b/internals/defaults/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/internals/defaults/">
       
       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -613,8 +613,8 @@
       
     </div>
     
-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/internals/networking/index.html b/internals/networking/index.html
index c8945530..3ad8d43e 100644
--- a/internals/networking/index.html
+++ b/internals/networking/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/internals/networking/">
       
       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -725,8 +725,8 @@ run into issues with grabbing certificates from the API-Server. Single-Node clus
       
     </div>
     
-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/sitemap.xml b/sitemap.xml
index 7a79885b..494445bd 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -1,51 +1,51 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url>
      <loc>https://k3d.io/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/commands/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/kubeconfig/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/multiserver/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/guides/exposing_services/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/guides/registries/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/guides/calico/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/usage/guides/cuda/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/internals/defaults/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/internals/networking/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/faq/faq/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url><url>
      <loc>https://k3d.io/faq/v1vsv3-comparison/</loc>
-     <lastmod>2021-02-04</lastmod>
+     <lastmod>2021-02-05</lastmod>
      <changefreq>daily</changefreq>
     </url>
 </urlset>
\ No newline at end of file
diff --git a/sitemap.xml.gz b/sitemap.xml.gz
index 6ee1b6e2..69d9ed75 100644
Binary files a/sitemap.xml.gz and b/sitemap.xml.gz differ
diff --git a/usage/commands/index.html b/usage/commands/index.html
index e535cfb9..c969ea26 100644
--- a/usage/commands/index.html
+++ b/usage/commands/index.html
@@ -14,7 +14,7 @@
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       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -683,8 +683,8 @@
       
     </div>
     
-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/usage/guides/calico/index.html b/usage/guides/calico/index.html
index 7338135d..51f8419f 100644
--- a/usage/guides/calico/index.html
+++ b/usage/guides/calico/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/usage/guides/calico/">
       
       <link rel="shortcut icon" href="../../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -718,8 +718,8 @@ https://docs.projectcalico.org/getting-started/kubernetes/k3s/</p>
       
     </div>
     
-      <script src="../../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/usage/guides/cuda/index.html b/usage/guides/cuda/index.html
index 7d6feea2..ca980a89 100644
--- a/usage/guides/cuda/index.html
+++ b/usage/guides/cuda/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/usage/guides/cuda/">
       
       <link rel="shortcut icon" href="../../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -985,8 +985,8 @@ kubectl logs cuda-vector-add
       
     </div>
     
-      <script src="../../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/usage/guides/exposing_services/index.html b/usage/guides/exposing_services/index.html
index 80acc7b8..f389eae8 100644
--- a/usage/guides/exposing_services/index.html
+++ b/usage/guides/exposing_services/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/usage/guides/exposing_services/">
       
       <link rel="shortcut icon" href="../../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -759,8 +759,8 @@ Therefore, we have to create the cluster in a way, that the internal port 80 (wh
       
     </div>
     
-      <script src="../../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/usage/guides/registries/index.html b/usage/guides/registries/index.html
index 5846e24c..ac605ebe 100644
--- a/usage/guides/registries/index.html
+++ b/usage/guides/registries/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/usage/guides/registries/">
       
       <link rel="shortcut icon" href="../../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -1005,8 +1005,8 @@ sandbox_image = "{{ .NodeConfig.AgentConfig.PauseImage }}"
       
     </div>
     
-      <script src="../../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/usage/kubeconfig/index.html b/usage/kubeconfig/index.html
index 3e100162..24ae2d56 100644
--- a/usage/kubeconfig/index.html
+++ b/usage/kubeconfig/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/usage/kubeconfig/">
       
       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -720,8 +720,8 @@ Note, that with multiple cluster specified, the <code>--kubeconfig-switch-contex
       
     </div>
     
-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({
diff --git a/usage/multiserver/index.html b/usage/multiserver/index.html
index 1fc3142e..35d8d662 100644
--- a/usage/multiserver/index.html
+++ b/usage/multiserver/index.html
@@ -14,7 +14,7 @@
         <link rel="canonical" href="https://k3d.io/usage/multiserver/">
       
       <link rel="shortcut icon" href="../../static/img/favicons_black_blue/favicon.png">
-      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.7">
+      <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-6.2.8">
     
     
       
@@ -670,8 +670,8 @@ That&rsquo;s because the initial server node was not started with the <code>--cl
       
     </div>
     
-      <script src="../../assets/javascripts/vendor.53cc9318.min.js"></script>
-      <script src="../../assets/javascripts/bundle.e9c9f54f.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
+      <script src="../../assets/javascripts/vendor.18f0862e.min.js"></script>
+      <script src="../../assets/javascripts/bundle.994580cf.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script>
       
       <script>
         app = initialize({