JSFiddle - React, Tailwind, and code Playground

by Gwyn Milcote

HTML

<span id="timer"></span>

JavaScript

var count=30;
var counter=setInterval(timer, 1000);

function timer()
{
  count=count-1;
  if (count <= 0)
  {
     clearInterval(counter);
     return;
  }

 document.getElementById("timer").innerHTML=count + " secs"; 
}