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42 lines
1.4 KiB
Markdown
42 lines
1.4 KiB
Markdown
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# 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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```
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$ npm install globals
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```
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## Usage
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```js
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const globals = require('globals');
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console.log(globals.browser);
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/*
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{
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addEventListener: false,
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applicationCache: false,
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ArrayBuffer: false,
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atob: false,
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...
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}
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*/
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```
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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)
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