JSFiddle - React, Tailwind, and code Playground

JavaScript

a = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
for(var i = 0; i < a.length-1; i++){
  for(var j = 0; j < a.length-i-1; j++){
    var k = a[j];
    a[j] = a[j+1];
    a[j+1] = k;
  }
}
alert(a);