| # globals [](https://travis-ci.org/sindresorhus/globals) |
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| > Global identifiers from different JavaScript environments |
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| Extracted from [JSHint](https://github.com/jshint/jshint/blob/3a8efa979dbb157bfb5c10b5826603a55a33b9ad/src/vars.js) and [ESLint](https://github.com/eslint/eslint/blob/b648406218f8a2d7302b98f5565e23199f44eb31/conf/environments.json) and merged. |
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| It's just a [JSON file](globals.json), so use it in whatever environment you like. |
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| **This module [no longer accepts](https://github.com/sindresorhus/globals/issues/82) new environments. If you need it for ESLint, just [create a plugin](http://eslint.org/docs/developer-guide/working-with-plugins#environments-in-plugins).** |
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| ## Install |
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| ``` |
| $ npm install globals |
| ``` |
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| ## Usage |
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| ```js |
| const globals = require('globals'); |
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| console.log(globals.browser); |
| /* |
| { |
| addEventListener: false, |
| applicationCache: false, |
| ArrayBuffer: false, |
| atob: false, |
| ... |
| } |
| */ |
| ``` |
| |
| Each global is given a value of `true` or `false`. A value of `true` indicates that the variable may be overwritten. A value of `false` indicates that the variable should be considered read-only. This information is used by static analysis tools to flag incorrect behavior. We assume all variables should be `false` unless we hear otherwise. |
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| ## License |
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| MIT © [Sindre Sorhus](https://sindresorhus.com) |
