JSFiddle - React, Tailwind, and code Playground

HTML

<script>_setInterval = setInterval;</script>

<!-- Hacktimer -->
<script>
 (function (workerScript) {
	if (!/MSIE 10/i.test (navigator.userAgent)) {
		try {
			var blob = new Blob (["\
var fakeIdToId = {};\
onmessage = function (event) {\
	var data = event.data,\
		name = data.name,\
		fakeId = data.fakeId,\
		time;\
	if(data.hasOwnProperty('time')) {\
		time = data.time;\
	}\
	switch (name) {\
		case 'setInterval':\
			fakeIdToId[fakeId] = setInterval(function () {\
				postMessage({fakeId: fakeId});\
			}, time);\
			break;\
		case 'clearInterval':\
			if (fakeIdToId.hasOwnProperty (fakeId)) {\
				clearInterval(fakeIdToId[fakeId]);\
				delete fakeIdToId[fakeId];\
			}\
			break;\
		case 'setTimeout':\
			fakeIdToId[fakeId] = setTimeout(function () {\
				postMessage({fakeId: fakeId});\
				if (fakeIdToId.hasOwnProperty (fakeId)) {\
					delete fakeIdToId[fakeId];\
				}\
			}, time);\
			break;\
		case 'clearTimeout':\
			if (fakeIdToId.hasOwnProperty (fakeId)) {\
				clearTimeout(fakeIdToId[fakeId]);\
				delete fakeIdToId[fakeId];\
			}\
			break;\
	}\
}\
"]);
			// Obtain a blob URL reference to our worker 'file'.
			workerScript = window.URL.createObjectURL(blob);
		} catch (error) {
			/* Blob is not supported, use external script instead */
		}
	}
	var worker,
		fakeIdToCallback = {},
		lastFakeId = 0,
		maxFakeId = 0x7FFFFFFF, // 2 ^ 31 - 1, 31 bit, positive values of signed 32 bit integer
		logPrefix = 'HackTimer.js by turuslan: ';
	if (typeof (Worker) !== 'undefined') {
		function getFakeId () {
			do {
				if (lastFakeId == maxFakeId) {
					lastFakeId = 0;
				} else {
					lastFakeId ++;
				}
			} while (fakeIdToCallback.hasOwnProperty (lastFakeId));
			return lastFakeId;
		}
		try {
			worker = new Worker (workerScript);
			window.setInterval = function (callback, time /* , parameters */) {
				var fakeId = getFakeId ();
				fakeIdToCallback[fakeId] = {
					callback: callback,
					parameters: Array.prototype.slice.call(arguments,...

CSS

.log {
  width: 100px;
  height: 400px;
  overflow: scroll;
}

JavaScript

alert(_setInterval === setInterval);

setInterval(function() {
	document.querySelector('.log').innerHTML += (performance.now()/1e3).toFixed(1) + '\n';
}, 100);