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840 BJavaScriptView Raw
1'use strict';
2var $ = require('../internals/export');
3var $findIndex = require('../internals/array-iteration').findIndex;
4var addToUnscopables = require('../internals/add-to-unscopables');
5
6var FIND_INDEX = 'findIndex';
7var SKIPS_HOLES = true;
8
9// Shouldn't skip holes
10// eslint-disable-next-line es/no-array-prototype-findindex -- testing
11if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
12
13// `Array.prototype.findIndex` method
14// https://tc39.es/ecma262/#sec-array.prototype.findindex
15$({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
16 findIndex: function findIndex(callbackfn /* , that = undefined */) {
17 return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
18 }
19});
20
21// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
22addToUnscopables(FIND_INDEX);