JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="stop();">stop</button>
<i></i>

JavaScript

var i=0;
function myFunction(){
	i++;
	$('i').html(i);
}

interval = null;

interval = setInterval(function(){
	myFunction();
}, 100);

stop = function(){
	clearInterval(interval);
}