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| # array-find-index [](https://travis-ci.org/sindresorhus/array-find-index) | |
| > ES2015 [`Array#findIndex()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex) [ponyfill](https://ponyfill.com) | |
| ## Install | |
| ``` | |
| $ npm install --save array-find-index | |
| ``` | |
| ## Usage | |
| ```js | |
| const arrayFindIndex = require('array-find-index'); | |
| arrayFindIndex(['rainbow', 'unicorn', 'pony'], x => x === 'unicorn'); | |
| //=> 1 | |
| ``` | |
| ## API | |
| Same as `Array#findIndex()`, but with the input array as the first argument. | |
| ## License | |
| MIT © [Sindre Sorhus](https://sindresorhus.com) | |