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Editing: esnext.array.last-item.js
'use strict'; // TODO: Remove from `core-js@4` var DESCRIPTORS = require('../internals/descriptors'); var addToUnscopables = require('../internals/add-to-unscopables'); var toObject = require('../internals/to-object'); var lengthOfArrayLike = require('../internals/length-of-array-like'); var defineBuiltInAccessor = require('../internals/define-built-in-accessor'); // `Array.prototype.lastIndex` accessor // https://github.com/keithamus/proposal-array-last if (DESCRIPTORS) { defineBuiltInAccessor(Array.prototype, 'lastItem', { configurable: true, get: function lastItem() { var O = toObject(this); var len = lengthOfArrayLike(O); return len == 0 ? undefined : O[len - 1]; }, set: function lastItem(value) { var O = toObject(this); var len = lengthOfArrayLike(O); return O[len == 0 ? 0 : len - 1] = value; } }); addToUnscopables('lastItem'); }
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