1# number-is-nan [](https://travis-ci.org/sindresorhus/number-is-nan) 2 3> ES2015 [`Number.isNaN()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN) [ponyfill](https://ponyfill.com) 4 5 6## Install 7 8``` 9$ npm install --save number-is-nan 10``` 11 12 13## Usage 14 15```js 16var numberIsNan = require('number-is-nan'); 17 18numberIsNan(NaN); 19//=> true 20 21numberIsNan('unicorn'); 22//=> false 23``` 24 25 26## License 27 28MIT © [Sindre Sorhus](http://sindresorhus.com) 29
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