怎么把数组倒置，又不影响原来数组，reverse不行

var arr = ["1","2","3","4"];
var bbb = [...arr].reverse() //方法一
//var bbb = [].concat(arr).reverse()  //方法二
//var bbb = Object.assign([],arr).reverse()//方法三
//var bbb = arr.slice().reverse() //方法四

console.log(arr);//["1","2","3","4"];

console.log(bbb); //["4","3","2","1"];