aaac7fed
 liuqimichale
add
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'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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