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- '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` getter
- // https://github.com/keithamus/proposal-array-last
- if (DESCRIPTORS) {
- defineBuiltInAccessor(Array.prototype, 'lastIndex', {
- configurable: true,
- get: function lastIndex() {
- var O = toObject(this);
- var len = lengthOfArrayLike(O);
- return len === 0 ? 0 : len - 1;
- }
- });
-
- addToUnscopables('lastIndex');
- }
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