JSFiddle - React, Tailwind, and code Playground

HTML

<div id="menu">
    <div id="menuBtn" accesskey="r">Menu</div>
    <ul>
        <li>Item 1</li>
        <li>Item 2</li>
        <li>Item 3</li>
    </ul>    
</div>

CSS

ul {
    display:none;
}

JavaScript

jQuery("#menuBtn").click(function(){
   jQuery(this).next().toggle(); 
});