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