JSFiddle - React, Tailwind, and code Playground

HTML

<script>
    
    
</script>
<div>
    Registration closes in <span id="timer">(60)<span>
</div>

JavaScript

window.onload = function(){
    var sec = 60;
    
}

function resetTimer()
{
 var sec=60;
		setInterval(function(){
        document.getElementById("timer").innerHTML =  '('+sec+')' ;
        sec--;
        if(sec == 00)
        {
     
            sec = 60;
        }
        },1000);    
}