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/** @license React v0.9.0
* react-refresh-runtime.development.js
*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
if (process.env.NODE_ENV !== "production") {
(function() {
'use strict';
// ATTENTION
// When adding new symbols to this file,
// Please consider also adding to 'react-devtools-shared/src/backend/ReactSymbols'
// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var REACT_ELEMENT_TYPE = 0xeac7;
var REACT_PORTAL_TYPE = 0xeaca;
var REACT_FRAGMENT_TYPE = 0xeacb;
var REACT_STRICT_MODE_TYPE = 0xeacc;
var REACT_PROFILER_TYPE = 0xead2;
var REACT_PROVIDER_TYPE = 0xeacd;
var REACT_CONTEXT_TYPE = 0xeace;
var REACT_FORWARD_REF_TYPE = 0xead0;
var REACT_SUSPENSE_TYPE = 0xead1;
var REACT_SUSPENSE_LIST_TYPE = 0xead8;
var REACT_MEMO_TYPE = 0xead3;
var REACT_LAZY_TYPE = 0xead4;
var REACT_BLOCK_TYPE = 0xead9;
var REACT_SERVER_BLOCK_TYPE = 0xeada;
var REACT_FUNDAMENTAL_TYPE = 0xead5;
var REACT_SCOPE_TYPE = 0xead7;
var REACT_OPAQUE_ID_TYPE = 0xeae0;
var REACT_DEBUG_TRACING_MODE_TYPE = 0xeae1;
var REACT_OFFSCREEN_TYPE = 0xeae2;
var REACT_LEGACY_HIDDEN_TYPE = 0xeae3;
if (typeof Symbol === 'function' && Symbol.for) {
var symbolFor = Symbol.for;
REACT_ELEMENT_TYPE = symbolFor('react.element');
REACT_PORTAL_TYPE = symbolFor('react.portal');
REACT_FRAGMENT_TYPE = symbolFor('react.fragment');
REACT_STRICT_MODE_TYPE = symbolFor('react.strict_mode');
REACT_PROFILER_TYPE = symbolFor('react.profiler');
REACT_PROVIDER_TYPE = symbolFor('react.provider');
REACT_CONTEXT_TYPE = symbolFor('react.context');
REACT_FORWARD_REF_TYPE = symbolFor('react.forward_ref');
REACT_SUSPENSE_TYPE = symbolFor('react.suspense');
REACT_SUSPENSE_LIST_TYPE = symbolFor('react.suspense_list');
REACT_MEMO_TYPE = symbolFor('react.memo');
REACT_LAZY_TYPE = symbolFor('react.lazy');
REACT_BLOCK_TYPE = symbolFor('react.block');
REACT_SERVER_BLOCK_TYPE = symbolFor('react.server.block');
REACT_FUNDAMENTAL_TYPE = symbolFor('react.fundamental');
REACT_SCOPE_TYPE = symbolFor('react.scope');
REACT_OPAQUE_ID_TYPE = symbolFor('react.opaque.id');
REACT_DEBUG_TRACING_MODE_TYPE = symbolFor('react.debug_trace_mode');
REACT_OFFSCREEN_TYPE = symbolFor('react.offscreen');
REACT_LEGACY_HIDDEN_TYPE = symbolFor('react.legacy_hidden');
}
var PossiblyWeakMap = typeof WeakMap === 'function' ? WeakMap : Map; // We never remove these associations.
// It's OK to reference families, but use WeakMap/Set for types.
var allFamiliesByID = new Map();
var allFamiliesByType = new PossiblyWeakMap();
var allSignaturesByType = new PossiblyWeakMap(); // This WeakMap is read by React, so we only put families
// that have actually been edited here. This keeps checks fast.
// $FlowIssue
var updatedFamiliesByType = new PossiblyWeakMap(); // This is cleared on every performReactRefresh() call.
// It is an array of [Family, NextType] tuples.
var pendingUpdates = []; // This is injected by the renderer via DevTools global hook.
var helpersByRendererID = new Map();
var helpersByRoot = new Map(); // We keep track of mounted roots so we can schedule updates.
var mountedRoots = new Set(); // If a root captures an error, we remember it so we can retry on edit.
var failedRoots = new Set(); // In environments that support WeakMap, we also remember the last element for every root.
// It needs to be weak because we do this even for roots that failed to mount.
// If there is no WeakMap, we won't attempt to do retrying.
// $FlowIssue
var rootElements = // $FlowIssue
typeof WeakMap === 'function' ? new WeakMap() : null;
var isPerformingRefresh = false;
function computeFullKey(signature) {
if (signature.fullKey !== null) {
return signature.fullKey;
}
var fullKey = signature.ownKey;
var hooks;
try {
hooks = signature.getCustomHooks();
} catch (err) {
// This can happen in an edge case, e.g. if expression like Foo.useSomething
// depends on Foo which is lazily initialized during rendering.
// In that case just assume we'll have to remount.
signature.forceReset = true;
signature.fullKey = fullKey;
return fullKey;
}
for (var i = 0; i < hooks.length; i++) {
var hook = hooks[i];
if (typeof hook !== 'function') {
// Something's wrong. Assume we need to remount.
signature.forceReset = true;
signature.fullKey = fullKey;
return fullKey;
}
var nestedHookSignature = allSignaturesByType.get(hook);
if (nestedHookSignature === undefined) {
// No signature means Hook wasn't in the source code, e.g. in a library.
// We'll skip it because we can assume it won't change during this session.
continue;
}
var nestedHookKey = computeFullKey(nestedHookSignature);
if (nestedHookSignature.forceReset) {
signature.forceReset = true;
}
fullKey += '\n---\n' + nestedHookKey;
}
signature.fullKey = fullKey;
return fullKey;
}
function haveEqualSignatures(prevType, nextType) {
var prevSignature = allSignaturesByType.get(prevType);
var nextSignature = allSignaturesByType.get(nextType);
if (prevSignature === undefined && nextSignature === undefined) {
return true;
}
if (prevSignature === undefined || nextSignature === undefined) {
return false;
}
if (computeFullKey(prevSignature) !== computeFullKey(nextSignature)) {
return false;
}
if (nextSignature.forceReset) {
return false;
}
return true;
}
function isReactClass(type) {
return type.prototype && type.prototype.isReactComponent;
}
function canPreserveStateBetween(prevType, nextType) {
if (isReactClass(prevType) || isReactClass(nextType)) {
return false;
}
if (haveEqualSignatures(prevType, nextType)) {
return true;
}
return false;
}
function resolveFamily(type) {
// Only check updated types to keep lookups fast.
return updatedFamiliesByType.get(type);
} // If we didn't care about IE11, we could use new Map/Set(iterable).
function cloneMap(map) {
var clone = new Map();
map.forEach(function (value, key) {
clone.set(key, value);
});
return clone;
}
function cloneSet(set) {
var clone = new Set();
set.forEach(function (value) {
clone.add(value);
});
return clone;
}
function performReactRefresh() {
if (pendingUpdates.length === 0) {
return null;
}
if (isPerformingRefresh) {
return null;
}
isPerformingRefresh = true;
try {
var staleFamilies = new Set();
var updatedFamilies = new Set();
var updates = pendingUpdates;
pendingUpdates = [];
updates.forEach(function (_ref) {
var family = _ref[0],
nextType = _ref[1];
// Now that we got a real edit, we can create associations
// that will be read by the React reconciler.
var prevType = family.current;
updatedFamiliesByType.set(prevType, family);
updatedFamiliesByType.set(nextType, family);
family.current = nextType; // Determine whether this should be a re-render or a re-mount.
if (canPreserveStateBetween(prevType, nextType)) {
updatedFamilies.add(family);
} else {
staleFamilies.add(family);
}
}); // TODO: rename these fields to something more meaningful.
var update = {
updatedFamilies: updatedFamilies,
// Families that will re-render preserving state
staleFamilies: staleFamilies // Families that will be remounted
};
helpersByRendererID.forEach(function (helpers) {
// Even if there are no roots, set the handler on first update.
// This ensures that if *new* roots are mounted, they'll use the resolve handler.
helpers.setRefreshHandler(resolveFamily);
});
var didError = false;
var firstError = null; // We snapshot maps and sets that are mutated during commits.
// If we don't do this, there is a risk they will be mutated while
// we iterate over them. For example, trying to recover a failed root
// may cause another root to be added to the failed list -- an infinite loop.
var failedRootsSnapshot = cloneSet(failedRoots);
var mountedRootsSnapshot = cloneSet(mountedRoots);
var helpersByRootSnapshot = cloneMap(helpersByRoot);
failedRootsSnapshot.forEach(function (root) {
var helpers = helpersByRootSnapshot.get(root);
if (helpers === undefined) {
throw new Error('Could not find helpers for a root. This is a bug in React Refresh.');
}
if (!failedRoots.has(root)) {// No longer failed.
}
if (rootElements === null) {
return;
}
if (!rootElements.has(root)) {
return;
}
var element = rootElements.get(root);
try {
helpers.scheduleRoot(root, element);
} catch (err) {
if (!didError) {
didError = true;
firstError = err;
} // Keep trying other roots.
}
});
mountedRootsSnapshot.forEach(function (root) {
var helpers = helpersByRootSnapshot.get(root);
if (helpers === undefined) {
throw new Error('Could not find helpers for a root. This is a bug in React Refresh.');
}
if (!mountedRoots.has(root)) {// No longer mounted.
}
try {
helpers.scheduleRefresh(root, update);
} catch (err) {
if (!didError) {
didError = true;
firstError = err;
} // Keep trying other roots.
}
});
if (didError) {
throw firstError;
}
return update;
} finally {
isPerformingRefresh = false;
}
}
function register(type, id) {
{
if (type === null) {
return;
}
if (typeof type !== 'function' && typeof type !== 'object') {
return;
} // This can happen in an edge case, e.g. if we register
// return value of a HOC but it returns a cached component.
// Ignore anything but the first registration for each type.
if (allFamiliesByType.has(type)) {
return;
} // Create family or remember to update it.
// None of this bookkeeping affects reconciliation
// until the first performReactRefresh() call above.
var family = allFamiliesByID.get(id);
if (family === undefined) {
family = {
current: type
};
allFamiliesByID.set(id, family);
} else {
pendingUpdates.push([family, type]);
}
allFamiliesByType.set(type, family); // Visit inner types because we might not have registered them.
if (typeof type === 'object' && type !== null) {
switch (type.$$typeof) {
case REACT_FORWARD_REF_TYPE:
register(type.render, id + '$render');
break;
case REACT_MEMO_TYPE:
register(type.type, id + '$type');
break;
}
}
}
}
function setSignature(type, key) {
var forceReset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
var getCustomHooks = arguments.length > 3 ? arguments[3] : undefined;
{
allSignaturesByType.set(type, {
forceReset: forceReset,
ownKey: key,
fullKey: null,
getCustomHooks: getCustomHooks || function () {
return [];
}
});
}
} // This is lazily called during first render for a type.
// It captures Hook list at that time so inline requires don't break comparisons.
function collectCustomHooksForSignature(type) {
{
var signature = allSignaturesByType.get(type);
if (signature !== undefined) {
computeFullKey(signature);
}
}
}
function getFamilyByID(id) {
{
return allFamiliesByID.get(id);
}
}
function getFamilyByType(type) {
{
return allFamiliesByType.get(type);
}
}
function findAffectedHostInstances(families) {
{
var affectedInstances = new Set();
mountedRoots.forEach(function (root) {
var helpers = helpersByRoot.get(root);
if (helpers === undefined) {
throw new Error('Could not find helpers for a root. This is a bug in React Refresh.');
}
var instancesForRoot = helpers.findHostInstancesForRefresh(root, families);
instancesForRoot.forEach(function (inst) {
affectedInstances.add(inst);
});
});
return affectedInstances;
}
}
function injectIntoGlobalHook(globalObject) {
{
// For React Native, the global hook will be set up by require('react-devtools-core').
// That code will run before us. So we need to monkeypatch functions on existing hook.
// For React Web, the global hook will be set up by the extension.
// This will also run before us.
var hook = globalObject.__REACT_DEVTOOLS_GLOBAL_HOOK__;
if (hook === undefined) {
// However, if there is no DevTools extension, we'll need to set up the global hook ourselves.
// Note that in this case it's important that renderer code runs *after* this method call.
// Otherwise, the renderer will think that there is no global hook, and won't do the injection.
var nextID = 0;
globalObject.__REACT_DEVTOOLS_GLOBAL_HOOK__ = hook = {
renderers: new Map(),
supportsFiber: true,
inject: function (injected) {
return nextID++;
},
onScheduleFiberRoot: function (id, root, children) {},
onCommitFiberRoot: function (id, root, maybePriorityLevel, didError) {},
onCommitFiberUnmount: function () {}
};
} // Here, we just want to get a reference to scheduleRefresh.
var oldInject = hook.inject;
hook.inject = function (injected) {
var id = oldInject.apply(this, arguments);
if (typeof injected.scheduleRefresh === 'function' && typeof injected.setRefreshHandler === 'function') {
// This version supports React Refresh.
helpersByRendererID.set(id, injected);
}
return id;
}; // Do the same for any already injected roots.
// This is useful if ReactDOM has already been initialized.
// https://github.com/facebook/react/issues/17626
hook.renderers.forEach(function (injected, id) {
if (typeof injected.scheduleRefresh === 'function' && typeof injected.setRefreshHandler === 'function') {
// This version supports React Refresh.
helpersByRendererID.set(id, injected);
}
}); // We also want to track currently mounted roots.
var oldOnCommitFiberRoot = hook.onCommitFiberRoot;
var oldOnScheduleFiberRoot = hook.onScheduleFiberRoot || function () {};
hook.onScheduleFiberRoot = function (id, root, children) {
if (!isPerformingRefresh) {
// If it was intentionally scheduled, don't attempt to restore.
// This includes intentionally scheduled unmounts.
failedRoots.delete(root);
if (rootElements !== null) {
rootElements.set(root, children);
}
}
return oldOnScheduleFiberRoot.apply(this, arguments);
};
hook.onCommitFiberRoot = function (id, root, maybePriorityLevel, didError) {
var helpers = helpersByRendererID.get(id);
if (helpers === undefined) {
return;
}
helpersByRoot.set(root, helpers);
var current = root.current;
var alternate = current.alternate; // We need to determine whether this root has just (un)mounted.
// This logic is copy-pasted from similar logic in the DevTools backend.
// If this breaks with some refactoring, you'll want to update DevTools too.
if (alternate !== null) {
var wasMounted = alternate.memoizedState != null && alternate.memoizedState.element != null;
var isMounted = current.memoizedState != null && current.memoizedState.element != null;
if (!wasMounted && isMounted) {
// Mount a new root.
mountedRoots.add(root);
failedRoots.delete(root);
} else if (wasMounted && isMounted) ; else if (wasMounted && !isMounted) {
// Unmount an existing root.
mountedRoots.delete(root);
if (didError) {
// We'll remount it on future edits.
failedRoots.add(root);
} else {
helpersByRoot.delete(root);
}
} else if (!wasMounted && !isMounted) {
if (didError) {
// We'll remount it on future edits.
failedRoots.add(root);
}
}
} else {
// Mount a new root.
mountedRoots.add(root);
}
return oldOnCommitFiberRoot.apply(this, arguments);
};
}
}
function hasUnrecoverableErrors() {
// TODO: delete this after removing dependency in RN.
return false;
} // Exposed for testing.
function _getMountedRootCount() {
{
return mountedRoots.size;
}
} // This is a wrapper over more primitive functions for setting signature.
// Signatures let us decide whether the Hook order has changed on refresh.
//
// This function is intended to be used as a transform target, e.g.:
// var _s = createSignatureFunctionForTransform()
//
// function Hello() {
// const [foo, setFoo] = useState(0);
// const value = useCustomHook();
// _s(); /* Second call triggers collecting the custom Hook list.
// * This doesn't happen during the module evaluation because we
// * don't want to change the module order with inline requires.
// * Next calls are noops. */
// return <h1>Hi</h1>;
// }
//
// /* First call specifies the signature: */
// _s(
// Hello,
// 'useState{[foo, setFoo]}(0)',
// () => [useCustomHook], /* Lazy to avoid triggering inline requires */
// );
function createSignatureFunctionForTransform() {
{
// We'll fill in the signature in two steps.
// First, we'll know the signature itself. This happens outside the component.
// Then, we'll know the references to custom Hooks. This happens inside the component.
// After that, the returned function will be a fast path no-op.
var status = 'needsSignature';
var savedType;
var hasCustomHooks;
return function (type, key, forceReset, getCustomHooks) {
switch (status) {
case 'needsSignature':
if (type !== undefined) {
// If we received an argument, this is the initial registration call.
savedType = type;
hasCustomHooks = typeof getCustomHooks === 'function';
setSignature(type, key, forceReset, getCustomHooks); // The next call we expect is from inside a function, to fill in the custom Hooks.
status = 'needsCustomHooks';
}
break;
case 'needsCustomHooks':
if (hasCustomHooks) {
collectCustomHooksForSignature(savedType);
}
status = 'resolved';
break;
}
return type;
};
}
}
function isLikelyComponentType(type) {
{
switch (typeof type) {
case 'function':
{
// First, deal with classes.
if (type.prototype != null) {
if (type.prototype.isReactComponent) {
// React class.
return true;
}
var ownNames = Object.getOwnPropertyNames(type.prototype);
if (ownNames.length > 1 || ownNames[0] !== 'constructor') {
// This looks like a class.
return false;
} // eslint-disable-next-line no-proto
if (type.prototype.__proto__ !== Object.prototype) {
// It has a superclass.
return false;
} // Pass through.
// This looks like a regular function with empty prototype.
} // For plain functions and arrows, use name as a heuristic.
var name = type.name || type.displayName;
return typeof name === 'string' && /^[A-Z]/.test(name);
}
case 'object':
{
if (type != null) {
switch (type.$$typeof) {
case REACT_FORWARD_REF_TYPE:
case REACT_MEMO_TYPE:
// Definitely React components.
return true;
default:
return false;
}
}
return false;
}
default:
{
return false;
}
}
}
}
exports._getMountedRootCount = _getMountedRootCount;
exports.collectCustomHooksForSignature = collectCustomHooksForSignature;
exports.createSignatureFunctionForTransform = createSignatureFunctionForTransform;
exports.findAffectedHostInstances = findAffectedHostInstances;
exports.getFamilyByID = getFamilyByID;
exports.getFamilyByType = getFamilyByType;
exports.hasUnrecoverableErrors = hasUnrecoverableErrors;
exports.injectIntoGlobalHook = injectIntoGlobalHook;
exports.isLikelyComponentType = isLikelyComponentType;
exports.performReactRefresh = performReactRefresh;
exports.register = register;
exports.setSignature = setSignature;
})();
}