| 'use strict'; |
| |
| var ES2016 = require('./es2016'); |
| var assign = require('./helpers/assign'); |
| |
| var ES2017 = assign(assign({}, ES2016), { |
| ToIndex: function ToIndex(value) { |
| if (typeof value === 'undefined') { |
| return 0; |
| } |
| var integerIndex = this.ToInteger(value); |
| if (integerIndex < 0) { |
| throw new RangeError('index must be >= 0'); |
| } |
| var index = this.ToLength(integerIndex); |
| if (!this.SameValueZero(integerIndex, index)) { |
| throw new RangeError('index must be >= 0 and < 2 ** 53 - 1'); |
| } |
| return index; |
| } |
| }); |
| |
| delete ES2017.EnumerableOwnNames; // replaced with EnumerableOwnProperties |
| |
| module.exports = ES2017; |
