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Add Array.prototype.includes polyfill 

Summary:
Add `Array.prototype.includes` polyfill.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes

I had all my `includes` running well on iOS 9 but when switching to Android `includes` threw an error.
[The compatibility table](http://kangax.github.io/compat-table/esnext/#test-Array.prototype.includes_Array.prototype.includes) shows that is not supported on Android yet as well as iOS 6-8.
With Chrome debugging it's working on both environment.
Closes https://github.com/facebook/react-native/pull/7756

Reviewed By: davidaurelio

Differential Revision: D3346873

Pulled By: vjeux

fbshipit-source-id: 2e17d29992873fbe4448b962df0423e516455b4b
This commit is contained in:
Yann Pringault 2016-05-25 11:50:53 -07:00 committed by Facebook Github Bot 7
parent 0dd8af0ea2
commit fb050c4520
1 changed files with 36 additions and 0 deletions
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36
react-packager/src/Resolver/polyfills/Array.prototype.es6.js
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@ -53,3 +53,39 @@ if (!Array.prototype.find) {
}
});
}
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
if (!Array.prototype.includes) {
Object.defineProperty(Array.prototype, 'includes', {
enumerable: false,
writable: true,
configurable: true,
value: function (searchElement) {
var O = Object(this);
var len = parseInt(O.length) || 0;
if (len === 0) {
return false;
}
var n = parseInt(arguments[1]) || 0;
var k;
if (n >= 0) {
k = n;
} else {
k = len + n;
if (k < 0) {
k = 0;
}
}
var currentElement;
while (k < len) {
currentElement = O[k];
if (searchElement === currentElement ||
(searchElement !== searchElement && currentElement !== currentElement)) {
return true;
}
k++;
}
return false;
}
});
}