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   1 # number-is-nan [![Build Status](https://travis-ci.org/sindresorhus/number-is-nan.svg?branch=master)](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
  16 var numberIsNan = require('number-is-nan');
  17
  18 numberIsNan(NaN);
  19 //=> true
  20
  21 numberIsNan('unicorn');
  22 //=> false
  23 ```
  24
  25
  26 ## License
  27
  28 MIT © [Sindre Sorhus](http://sindresorhus.com)