JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>

<div id="varRefresh">
    hi
</div>

JavaScript

$(document).ready(function () {
    $('#varRefresh').html('0');
    refreshVar();
});

var number=0;
function refreshVar() {
	
    var refresh = setInterval(function(){
    number++;
    $('#varRefresh').html(number);
    }, 5000);
}