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