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73 lines
2.2 KiB
73 lines
2.2 KiB
# is-resolvable
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[](https://www.npmjs.com/package/is-resolvable)
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[](https://travis-ci.org/shinnn/is-resolvable)
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[](https://ci.appveyor.com/project/ShinnosukeWatanabe/is-resolvable)
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[](https://coveralls.io/r/shinnn/is-resolvable)
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A [Node.js](https://nodejs.org/) module to check if a given module ID is resolvable with [`require()`](https://nodejs.org/api/globals.html#globals_require)
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```javascript
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const isResolvable = require('is-resolvable');
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isResolvable('fs'); //=> true
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isResolvable('path'); //=> true
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// When ./index.js exists
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isResolvable('./index.js') //=> true
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isResolvable('./index') //=> true
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isResolvable('.') //=> true
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```
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## Installation
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[Use](https://docs.npmjs.com/cli/install) [npm](https://docs.npmjs.com/getting-started/what-is-npm).
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```
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npm install is-resolvable
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```
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## API
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```javascript
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const isResolvable = require('is-resolvable');
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```
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### isResolvable(*moduleId* [, *options*])
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*moduleId*: `string` (module ID)
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*options*: `Object` ([`require.resolve`](https://nodejs.org/api/modules.html#modules_require_resolve_request_options) options)
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Return: `boolean`
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It returns `true` if `require()` can load a file form a given module ID, otherwise `false`.
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```javascript
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const isResolvable = require('is-resolvable');
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// When ./foo.json exists
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isResolvable('./foo.json'); //=> true
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isResolvable('./foo'); //=> true
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isResolvable('./foo.js'); //=> false
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// When `eslint` module is installed but `jshint` isn't
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isResolvable('eslint'); //=> true
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isResolvable('jshint'); //=> false
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// When `lodash` module is installed
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isResolvable('lodash/isObject'); //=> true
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isResolvable('lodash/fp/reject.js'); //=> true
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```
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The second argument accepts an options object for `require.resolve()`.
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```javascript
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// When ./bar/baz.js exists
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isResolvable('./baz.js'); //=> false
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isResolvable('./baz.js', {paths: ['bar']}); //=> true
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```
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## License
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[ISC License](./LICENSE) © 2018 Shinnosuke Watanabe
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