JSFiddle - React, Tailwind, and code Playground

HTML

<body onload="onLoad()">
    <p id='notify'></p>
</body>

JavaScript

var target = document.querySelector('#notify');

	var config = {
	    attributes: true,
	    childList: true,
	    characterData: true
	};

	var observer = new window.MutationObserver(function (mutations) {
	    mutations.forEach(function (mutation) {
	        console.log('anbythingksdn');
	        console.log(mutation.type);
	    });
	}).observe(target, config);

	function onLoad() {
	    console.log('loaded');
	    setInterval(changeNotify, 2000);
	}

	function changeNotify() {
	    document.getElementById('notify').innerHTML += "1";
	}