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860 BJavaScriptView Raw
1'use strict';
2var $ = require('../internals/export');
3var $find = require('../internals/array-iteration').find;
4var addToUnscopables = require('../internals/add-to-unscopables');
5var arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');
6
7var FIND = 'find';
8var SKIPS_HOLES = true;
9
10var USES_TO_LENGTH = arrayMethodUsesToLength(FIND);
11
12// Shouldn't skip holes
13if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });
14
15// `Array.prototype.find` method
16// https://tc39.es/ecma262/#sec-array.prototype.find
17$({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH }, {
18 find: function find(callbackfn /* , that = undefined */) {
19 return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
20 }
21});
22
23// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
24addToUnscopables(FIND);