JSFiddle - React, Tailwind, and code Playground

HTML

<div id="navbar">
<ul>
    <li><a href="#">HOME</a></li>
    <li><a href="#">Link1</a></li>
    <li><a href="#">Link2</a>
    <ul>
        <li><a href="#">Link 2a</a></li>
        <li><a href="#">Link 2b</a></li>
        </ul>
    </li>
    <li><a href="#">Link3</a>
        <ul>
            <li><a href="#">Link 3a</a></li>
            <li><a href="#">Link 3b</a></li>
        </ul>
    </li>
    <li><a href="#">Final Link</a></li>
</ul>
</div>

CSS

#navbar{
    width:250px;
    background:#000000;
    margin:20;
    padding:0px;
    text-align:center;
    border:2px solid #f9f9f9;
}
#navbar ul{
    margin:0;
    padding:0;
    list-style:none;
}
#navbar ul li{
    position:relative;
    padding:5px;
    margin:5px;
    }
#navbar ul li a{
    font-family:Lucida Sans Unicode, Lucida Grande, sans-serif;
    text-decoration:none;
    font-weight:normal;
    color:#ffffff;
    display:block;
    border:2px solid #fff;
    padding:5px;
}
#navbar ul li a:hover{
    font-weight:bold;
}
#navbar ul ul{
    position:relative;
    display:none;
    }
#navbar ul ul li a{
    background:#fff;
    color:#000;
    padding:5px;
    margin:5px;
    border:0;
}
#navbar ul li: ul{
width:100%;
position:relative;
display:block;
top:0;
}

JavaScript

$(document).ready(function(){ 
       $("#navbar li").click(function() { 
          $(this).find("ul").slideToggle("slow"); 
       });
});