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Viewing file:     CanonicalNumericIndexString.js (654 B)      -rw-r--r--

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $TypeError = GetIntrinsic('%TypeError%');

var SameValue = require('./SameValue');
var ToNumber = require('./ToNumber');
var ToString = require('./ToString');
var Type = require('./Type');

// https://ecma-international.org/ecma-262/6.0/#sec-canonicalnumericindexstring

module.exports = function CanonicalNumericIndexString(argument) {
	if (Type(argument) !== 'String') {
		throw new $TypeError('Assertion failed: `argument` must be a String');
	}
	if (argument === '-0') { return -0; }
	var n = ToNumber(argument);
	if (SameValue(ToString(n), argument)) { return n; }
	return void 0;
};