copy.js

/*!
 * Create an identical clone of an array or object
 * (c) 2018 Chris Ferdinandi, MIT License, https://gomakethings.com
 * @param  {Array|Object} obj The array or object to copy
 * @return {Array|Object}     The clone of the array or object
 */
var copy = function (obj) {
	if (Object.prototype.toString.call(obj) === '[object Array]') {
		return obj.slice();
	}
	return JSON.parse(JSON.stringify(obj));
};