JSFiddle - React, Tailwind, and code Playground

by JM note

HTML

<style>
.highlight { background: yellow; }
#btn1 { width: 100px; height: 35px; }
</style>
<script src='//code.jquery.com/jquery.min.js'></script>
<script>
$(function() {
    $('#btn1').click(function() {
        $('#greet').toggleClass('highlight');
    });
});
</script>
    
<div id='greet'>안녕 친구들</div>
<br><button id='btn1'>토글 버튼</button>