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Editing: readme.md

# path-key [![Build Status](https://travis-ci.org/sindresorhus/path-key.svg?branch=master)](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.

---

<div align="center">
	<b>
		<a href="https://tidelift.com/subscription/pkg/npm-path-key?utm_source=npm-path-key&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
	</b>
	<br>
	<sub>
		Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
	</sub>
</div>

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