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static/js/ketcher2/node_modules/is-defined/readme.md
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# is-defined [](https://travis-ci.org/bendrucker/is-defined)
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> Check if an identifier is defined
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## Install
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```
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$ npm install --save is-defined
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```
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## Usage
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```js
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var isDefined = require('is-defined')
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isDefined('window')
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//=> typeof window !== 'undefined'
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```
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## API
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#### `isDefined(identifier)` -> `string`
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##### identifier
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*Required*
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Type: `string`
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A JavaScript identifier.
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## License
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MIT © [Ben Drucker](http://bendrucker.me)
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