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# number-is-nan [](https://travis-ci.org/sindresorhus/number-is-nan)
> ES2015 [`Number.isNaN()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN) [ponyfill](https://ponyfill.com)
## Install
```
$ npm install --save number-is-nan
```
## Usage
```js
var numberIsNan = require('number-is-nan');
numberIsNan(NaN);
//=> true
numberIsNan('unicorn');
//=> false
```
## License
MIT © [Sindre Sorhus](http://sindresorhus.com)