es.array.find.js 874 Bytes
'use strict';
var $ = require('../internals/export');
var $find = require('../internals/array-iteration').find;
var addToUnscopables = require('../internals/add-to-unscopables');
var arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');

var FIND = 'find';
var SKIPS_HOLES = true;

var USES_TO_LENGTH = arrayMethodUsesToLength(FIND);

// Shouldn't skip holes
if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });

// `Array.prototype.find` method
// https://tc39.github.io/ecma262/#sec-array.prototype.find
$({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH }, {
  find: function find(callbackfn /* , that = undefined */) {
    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
  }
});

// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
addToUnscopables(FIND);