JSFiddle - React, Tailwind, and code Playground

HTML

<div id="showmenu">Next</div>
<div><ul><li>Section1</li><li style="display: none;"  class="menu">Section2</li><li style="display: none;"  class="menu">SectionButton3</li></ul></div>

JavaScript

$(document).ready(function() {
        $('#showmenu').click(function() {
                $('.menu').slideToggle("fast");
        });
    });