JSFiddle - React, Tailwind, and code Playground
HTML
<script>
$().ready(function(){
setInterval(function(){
var d = new Date();
var hour = (d.getHours()).toString();
hour = (hour.length == 1) ? "0"+hour : hour;
var min = (d.getMinutes()+1).toString();
min = (min.length == 1) ? "0"+min : min;
var sec = (d.getSeconds()).toString();
sec = (sec.length == 1) ? "0"+sec : sec;
$("#mainDiv").text(hour+":"+min+":"+sec);
},100);
});
</script>
<div id="mainDiv"></div>