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# number-is-nan [](https://travis-ci.org/sindresorhus/number-is-nan)
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> 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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## Install
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```
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$ npm install --save number-is-nan
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```
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## Usage
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```js
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var numberIsNan = require('number-is-nan');
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numberIsNan(NaN);
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//=> true
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numberIsNan('unicorn');
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//=> false
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```
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## License
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MIT © [Sindre Sorhus](http://sindresorhus.com)
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