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# which-module
> Find the module object for something that was require()d
[](https://travis-ci.org/nexdrew/which-module)
[](https://coveralls.io/github/nexdrew/which-module?branch=master)
[](https://github.com/conventional-changelog/standard-version)
Find the `module` object in `require.cache` for something that was `require()`d
or `import`ed - essentially a reverse `require()` lookup.
Useful for libs that want to e.g. lookup a filename for a module or submodule
that it did not `require()` itself.
## Install and Usage
```
npm install --save which-module
```
```js
const whichModule = require('which-module')
console.log(whichModule(require('something')))
// Module {
// id: '/path/to/project/node_modules/something/index.js',
// exports: [Function],
// parent: ...,
// filename: '/path/to/project/node_modules/something/index.js',
// loaded: true,
// children: [],
// paths: [ '/path/to/project/node_modules/something/node_modules',
// '/path/to/project/node_modules',
// '/path/to/node_modules',
// '/path/node_modules',
// '/node_modules' ] }
```
## API
### `whichModule(exported)`
Return the [`module` object](https://nodejs.org/api/modules.html#modules_the_module_object),
if any, that represents the given argument in the `require.cache`.
`exported` can be anything that was previously `require()`d or `import`ed as a
module, submodule, or dependency - which means `exported` is identical to the
`module.exports` returned by this method.
If `exported` did not come from the `exports` of a `module` in `require.cache`,
then this method returns `null`.
## License
ISC © Contributors