JSFiddle - React, Tailwind, and code Playground

HTML

<script type="text/javascript" src="https://code.jquery.com/jquery-1.12.3.js"></script>
<body>
<div class="app">
<button onclick="alert('salut')" id="boutonAlerte">Alerte</button>
</div>
</body>

JavaScript

$("#boutonAlerte").click(function(){
       alert("ceci est une alerte");
   });