JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <body>
<a id="button" title="button">Press Me</a>
    </body>
</html>

CSS

a {
    background: #ccc;
    cursor: pointer;
    border-top: solid 2px #eaeaea;
    border-left: solid 2px #eaeaea;
    border-bottom: solid 2px #777;
    border-right: solid 2px #777;
    padding: 5px 5px;           
    }

a.down {
    background: #bbb;
    border-top: solid 2px #777;
    border-left: solid 2px #777;
    border-bottom:solid 2px  #eaeaea;
    border-right: solid 2px #eaeaea;
    }

JavaScript

$(document).ready(function(){
    $('a#button').click(function(){
        $(this).toggleClass("down");
    });
});