# path-key [](https://travis-ci.org/sindresorhus/path-key) | |
> Get the [PATH](https://en.wikipedia.org/wiki/PATH_(variable)) environment variable key cross-platform | |
It's usually `PATH`, but on Windows it can be any casing like `Path`... | |
## Install | |
``` | |
$ npm install path-key | |
``` | |
## Usage | |
```js | |
const pathKey = require('path-key'); | |
const key = pathKey(); | |
//=> 'PATH' | |
const PATH = process.env[key]; | |
//=> '/usr/local/bin:/usr/bin:/bin' | |
``` | |
## API | |
### pathKey(options?) | |
#### options | |
Type: `object` | |
##### env | |
Type: `object`<br> | |
Default: [`process.env`](https://nodejs.org/api/process.html#process_process_env) | |
Use a custom environment variables object. | |
#### platform | |
Type: `string`<br> | |
Default: [`process.platform`](https://nodejs.org/api/process.html#process_process_platform) | |
Get the PATH key for a specific platform. | |
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