You can use the native reverse() function to reverse an array in JavaScript.

Here is the sample code.

var list = [1, 2, 3, 4, 5];
list.reverse();
// 5,4,3,2,1

You can store the array in a separate variable using the slice() operator.

var list = [1, 2, 3, 4, 5];
var reversedList = list.slice().reverse();
console.log(list);
// 1,2,3,4,5
console.log(reversedList);
// 5,4,3,2,1