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   1 # array-find-index [![Build Status](https://travis-ci.org/sindresorhus/array-find-index.svg?branch=master)](https://travis-ci.org/sindresorhus/array-find-index)
   2
   3 > ES2015 [`Array#findIndex()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex) [ponyfill](https://ponyfill.com)
   4
   5
   6 ## Install
   7
   8 ```
   9 $ npm install --save array-find-index
  10 ```
  11
  12
  13 ## Usage
  14
  15 ```js
  16 const arrayFindIndex = require('array-find-index');
  17
  18 arrayFindIndex(['rainbow', 'unicorn', 'pony'], x => x === 'unicorn');
  19 //=> 1
  20 ```
  21
  22
  23 ## API
  24
  25 Same as `Array#findIndex()`, but with the input array as the first argument.
  26
  27
  28 ## License
  29
  30 MIT © [Sindre Sorhus](https://sindresorhus.com)