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| 1 | # number-is-nan [](https://travis-ci.org/sindresorhus/number-is-nan)
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| 2 |
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| 3 | > ES2015 [`Number.isNaN()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN) [ponyfill](https://ponyfill.com)
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| 4 |
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| 5 |
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| 6 | ## Install
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| 7 |
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| 8 | ```
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| 9 | $ npm install --save number-is-nan
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| 10 | ```
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| 11 |
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| 12 |
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| 13 | ## Usage
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| 14 |
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| 15 | ```js
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| 16 | var numberIsNan = require('number-is-nan');
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| 17 |
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| 18 | numberIsNan(NaN);
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| 19 | //=> true
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| 20 |
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| 21 | numberIsNan('unicorn');
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| 22 | //=> false
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| 23 | ```
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| 24 |
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| 25 |
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| 26 | ## License
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| 27 |
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| 28 | MIT © [Sindre Sorhus](http://sindresorhus.com)
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