| # 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) |