JSFiddle - React, Tailwind, and code Playground

HTML

<div id='d' data-timer='10'></div>

JavaScript

var div = document.getElementById('d')
  var cmd = div.dataset.timer;
  cmd = +cmd;
 
div.innerHTML = cmd;

if(div.innerHTML > 0){
	var timerId = setInterval(function() {
   console.log(cmd)
  	div.innerHTML = cmd;
  	cmd--
 
}, 1000);

}