JSFiddle - React, Tailwind, and code Playground

by akash4pj

HTML

<div id="timer">1</div>

JavaScript

var timer;

function myTimer(sec) {
    if (timer) clearInterval(timer);
    timer = setInterval(function() { 
        $('#timer').text(sec++);
        if (sec == 51) {
            clearInterval(timer);
            alert('done');
        } 
    }, 1000);
}
myTimer(1);