JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">    

    <ul id="topnav"> 
        <li><a href="javscript:void();">Home</a></li> 
        <li> 
            <a href="javscript:void();">About</a> 
            <span  class="current"> 
                <a href="javscript:void();">The Company</a> |
                <a href="javscript:void();">The Team</a> |
                <a href="javscript:void();">Careers</a> 
            </span> 
        </li> 
        <li> 
            <a href="javscript:void();">Services</a> 
            <span> 
                <a href="javscript:void();">What We Do</a> |
                <a href="javscript:void();">Our Process</a> |
                <a href="javscript:void();">Testimonials</a> 
            </span> 
        </li> 
        <li> 
            <a href="javscript:void();">Portfolio</a> 
            <span> 
                <a href="javscript:void();">Web Design</a> |
                <a href="javscript:void();">Development</a> |
                <a href="javscript:void();">Identity</a> |
                <a href="javscript:void();">SEO &amp; Internet Marketing</a> |
                <a href="javscript:void();">Print Design</a> 
            </span> 
        </li> 
        <li><a href="javscript:void();">Contact</a></li> 
    </ul> 
    
 
</div>

CSS

body {
    font: 10px normal Verdana, Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
}
h1 {
    font: 4.7em normal Georgia, 'Times New Roman', Times, serif;
    color: #333;
    margin: 0;
    padding: 5px 0;
}
h1 small{
    font: 0.2em normal Verdana, Arial, Helvetica, sans-serif;
    text-transform:uppercase;
    letter-spacing: 1.5em;
    display: block;
    color: #fff;
}
.container {width: 970px; margin: 0 auto;}
 
 
 
ul#topnav {
    margin: 0; padding: 0;
    float: left;
    width: 970px;
    list-style: none;
    position: relative;
    font-size: 1.2em;
    background: #009;
}
ul#topnav li {
    float: left;
    margin: 0; padding: 0;
    border-right: 1px solid #555;
}
ul#topnav li a {
    padding: 10px 15px;
    display: block;
    color: #f0f0f0;
    text-decoration: none;
}
ul#topnav li.hover { background: #1376c9}
ul#topnav li.current{ background: #f00}
ul#topnav li span {
    float: left;
    padding: 15px 0;
    position: absolute;
    left: 0; top:35px;
    display: none;
    width: 970px;
    background: #1376c9;
    color: #fff;
    -moz-border-radius-bottomright: 5px;
    -khtml-border-radius-bottomright: 5px;
    -webkit-border-bottom-right-radius: 5px;
    -moz-border-radius-bottomleft: 5px;
    -khtml-border-radius-bottomleft: 5px;
    -webkit-border-bottom-left-radius: 5px;
}
ul#topnav li:hover span { display: block; }
ul#topnav li span a { display: inline; }
ul#topnav li span a:hover {text-decoration: underline;}

JavaScript

//Hover Menu

$(document).ready(function() {
    
    $("ul#topnav li").hover(function() { //Hover over event on list item
        $(this).addClass('hover'); //Add background color + image on hovered list item
        $(this).find("span").show(); //Show the subnav
    } , function() { //on hover out...
        $(this).removeClass('hover'); //Ditch the background
        $(this).find("span").show(); //Hide the subnav
    }).click(function(){
        $("ul#topnav li").removeClass('current');
        $(this).addClass('current');
    });
        
});