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add
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# find-up [](https://travis-ci.org/sindresorhus/find-up) [](https://ci.appveyor.com/project/sindresorhus/find-up/branch/master)
> Find a file by walking up parent directories
## Install
```
$ npm install --save find-up
```
## Usage
```
/
└── Users
└── sindresorhus
├── unicorn.png
└── foo
└── bar
├── baz
└── example.js
```
```js
// example.js
const findUp = require('find-up');
findUp('unicorn.png').then(filepath => {
console.log(filepath);
//=> '/Users/sindresorhus/unicorn.png'
});
findUp(['rainbow.png', 'unicorn.png']).then(filepath => {
console.log(filepath);
//=> '/Users/sindresorhus/unicorn.png'
});
```
## API
### findUp(filename, [options])
Returns a `Promise` for the filepath or `null`.
### findUp([filenameA, filenameB], [options])
Returns a `Promise` for the first filepath found (by respecting the order) or `null`.
### findUp.sync(filename, [options])
Returns a filepath or `null`.
### findUp.sync([filenameA, filenameB], [options])
Returns the first filepath found (by respecting the order) or `null`.
#### filename
Type: `string`
Filename of the file to find.
#### options
##### cwd
Type: `string`<br>
Default: `process.cwd()`
Directory to start from.
## Related
- [find-up-cli](https://github.com/sindresorhus/find-up-cli) - CLI for this module
- [pkg-up](https://github.com/sindresorhus/pkg-up) - Find the closest package.json file
- [pkg-dir](https://github.com/sindresorhus/pkg-dir) - Find the root directory of an npm package
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)
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