JSFiddle - React, Tailwind, and code Playground

HTML

<div id="out"></div>

JavaScript

function shuffle( array ) {
  for(var j, x, i = array.length; i; j = parseInt(Math.random() * i), x = array[--i], array[i] = array[j], array[j] = x);
    return true;
}

var a = [1,2,3,4,5,6,7,8,9];

shuffle(a);

out.innerHTML = a.toString();