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- 'use strict';
- var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
- var toLength = require('../internals/to-length');
-
- var $RangeError = RangeError;
-
- // `ToIndex` abstract operation
- // https://tc39.es/ecma262/#sec-toindex
- module.exports = function (it) {
- if (it === undefined) return 0;
- var number = toIntegerOrInfinity(it);
- var length = toLength(number);
- if (number !== length) throw new $RangeError('Wrong length or index');
- return length;
- };
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