Array.prototype.reverse()
The JavaScript array method .reverse() will reverse the order of the elements within the array.
Syntax
var array = [1, 2, 3, 4, 5];
array.reverse();Description
.reverse() reverses the index of the elements of an array.
Examples
Use .reverse() to reverse the elements of an array
var array = [1, 2, 3, 4, 5];
console.log(array);
// Console will output 1, 2, 3, 4, 5
array.reverse();
console.log(array);
/* Console will output 5, 4, 3, 2, 1 and
the variable array now contains the set [5, 4, 3, 2, 1] */
Source MDN