JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE>
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>

<script type="text/javascript">
$(document).ready(function(){
$('#qwe').click(function(){
    alert('Ты нажал кнопку!');
})
     });
</script>
<title>index</title>
</head>
<body>
<button id="qwe">Кнопка</button>
</body>
</html>