JSFiddle - React, Tailwind, and code Playground

HTML

<div style='background-color:black;color:white' id="tweener">
        HELLO WORLD
    </div>

    <button onclick="javascript: function()">TWEEN</button>

<script type='text/javascript'>
    function ()
    {

       $('tweener').fade('toggle'); 
    alert("biczys");
    }
</script>