JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
	<title>Test</title>
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" />
	<script src="http://code.jquery.com/jquery-1.8.2.min.js"></script>
	<script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script>

	<script>
	
	function doWork(){
		//Append a lot of paragraphs
		for (var i = 0; i < 10000; i++) {
			$("div[data-role=content]").append("<p>This is some long string</p>");
		}
		$("div[data-role=content]").trigger("refresh");
		$.mobile.loading('hide');
	}
	
	$(document).on("pageinit", "#page1", function(){
		
		$("#btn1").click(function(){
			
			$.mobile.loading('show', {theme:"e", text:"Please wait...", textonly:true, textVisible: true});

			//Do something lengthy here
			setTimeout(function(){
				doWork();
			}, 50);

		});
	});
	
	</script>
</head>
<body>
	<div data-role="page" id="page1">
		<div data-role="header">
			<h1>Header</h1>
		</div>

		<div data-role="content">
	        <a id="btn1" href="#" data-role="button" data-transition="flip">Do work</a>
		</div>

		<div data-role="footer" data-position="fixed">
			<h1>Footer</h1>
		</div>
	</div>
</body>
</html>