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es-abstract
es2017.js
'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;
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