1# which-module 2 3> Find the module object for something that was require()d 4 5[](https://travis-ci.org/nexdrew/which-module) 6[](https://coveralls.io/github/nexdrew/which-module?branch=master) 7[](https://github.com/conventional-changelog/standard-version) 8 9Find the `module` object in `require.cache` for something that was `require()`d 10or `import`ed - essentially a reverse `require()` lookup. 11 12Useful for libs that want to e.g. lookup a filename for a module or submodule 13that it did not `require()` itself. 14 15## Install and Usage 16 17``` 18npm install --save which-module 19``` 20 21```js 22const whichModule = require('which-module') 23 24console.log(whichModule(require('something'))) 25// Module { 26// id: '/path/to/project/node_modules/something/index.js', 27// exports: [Function], 28// parent: ..., 29// filename: '/path/to/project/node_modules/something/index.js', 30// loaded: true, 31// children: [], 32// paths: [ '/path/to/project/node_modules/something/node_modules', 33// '/path/to/project/node_modules', 34// '/path/to/node_modules', 35// '/path/node_modules', 36// '/node_modules' ] } 37``` 38 39## API 40 41### `whichModule(exported)` 42 43Return the [`module` object](https://nodejs.org/api/modules.html#modules_the_module_object), 44if any, that represents the given argument in the `require.cache`. 45 46`exported` can be anything that was previously `require()`d or `import`ed as a 47module, submodule, or dependency - which means `exported` is identical to the 48`module.exports` returned by this method. 49 50If `exported` did not come from the `exports` of a `module` in `require.cache`, 51then this method returns `null`. 52 53## License 54 55ISC © Contributors 56
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