JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">

</div>

JavaScript

const numbers = [5,4,3,2,1,8,7,0,12]
numbers.forEach(num => {
  // assuming num*10ms difference is enough to avoid a race
  setTimeout(() => {
     document.getElementById('main').innerHTML+=" "+num;
  },num*10)
});