# 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 --save 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 ##### 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. ## License MIT © [Sindre Sorhus](https://sindresorhus.com)