JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://css-tricks.com/examples/MagicLine/css/style.css">
<div class="nav-wrap">

		<ul class="group" id="example-one">
            <li class="current_page_item">
            	<a href="#">Home</a>
            </li>
            <li><a href="#">Buy Tickets</a></li>
            <li><a href="#">Group Sales</a></li>
            <li><a href="#">Reviews</a></li>
            <li><a href="#">The Show</a></li>
            <li><a href="#">Videos</a></li>
            <li><a href="#">Photos</a></li>
            <li><a href="#">Magic Shop</a></li>
        </ul>
        
    </div>
        
    <div class="nav-wrap">   
        
        <ul class="group" id="example-two">
            <li><a rel="#fe4902" href="#">Home</a></li>
            <li><a rel="#A41322" href="#">Buy Tickets</a></li>
            <li><a rel="#C6AA01" href="#">Group Sales</a></li>
            <li class="current_page_item_two"><a rel="#900" href="#">Reviews</a></li>
            <li><a rel="#D40229" href="#">The Show</a></li>
            <li><a rel="#98CEAA" href="#">Videos</a></li>
            <li><a rel="#1B9B93" href="#">Photos</a></li>
            <li><a rel="#8DC91E" href="#">Magic Shop</a></li>
        </ul>
        
    </div>

CSS

* {
		margin: 0;
		padding: 0;
	}
	body {
		overflow-x: hidden;
	}
	.bsa_it_ad {
		padding: 8px 4px 8px 12px !important;
		position: relative;
		border: 0 !important;
		background: #D6D5D5 !important;
		border-top: 0 !important;
		box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.1);
		font: 11px "Lucida Grande", Sans-Serif !important;
	}
	.bsa_it_ad:before, .bsa_it_ad:after {
		content: "";
		position: absolute;
		top: 0;
		left: 6px;
		width: 100%;
		height: 100%;
		background: #989898;
		border-bottom: 6px solid #989898;
		z-index: -1;
		box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.1);
	}
	.bsa_it_ad:before {
		top: 0;
		left: 12px;
		z-index: -2;
		background: #6C6666;
		border-bottom: 12px solid #6C6666;
	}

	.bsa_it_ad a {
	  margin: 0 !important;
		padding: 0 !important;
	}
	.bsa_it_ad a img {
	  border: 0 !important;
		position: static !important;
	}
	.bsa_it_ad a:hover img {
		margin: 0 !important;
	}
	.bsa_it_ad a:hover {
	  background: none !important;
	}
	.bsa_it_i {
		margin: 0 15px 0 0 !important;
	}
	.bsa_it_t {
		font-size: 14px !important;
		margin: 12px 0 0 0 !important;
	}
	.bsa_it_d {
		padding-right: 10px;
	}
	.bsa_it_p{
		display: none !important;
	}
	#demo-bar-ad {
		width: 416px;
		position: absolute;
		right: 0;
		top: -20px;
		font: 11px "Lucida Grande", Sans-Serif !important;
	}
	#bsap_aplink {
		position: absolute;
		color: #999;
		text-decoration: none;
		bottom: 8px !important;
		right: 8px !important;
		padding: 0 !important;
	}
	.bsa_it_p a:hover {
		background:none !important;
	}
	#demo-top-bar {
		text-align: left;
		background: #e18728;
		position: relative;
		zoom: 1;
		width: 100% !important;
		z-index: 6000;
		box-shadow: 0 0 10px black;
		padding: 20px 0 15px;
	}
	#demo-bar-inside {
		width: 960px;
		margin: 0 auto;
		position: relative;
	}
	#demo-top-bar:before, #demo-top-bar:after {
		content: "";
		position: absolute;
		top: 0;
		left: 6px;
		width: 100%;
		height: 100%;
		background: #e18728;
		border-bottom: 6px solid...

JavaScript

// DOM Ready
$(function() {

    var $el, leftPos, newWidth;
        $mainNav2 = $("#example-two");
    
    /*
        EXAMPLE ONE
    */
    
    /* Add Magic Line markup via JavaScript, because it ain't gonna work without */
    $("#example-one").append("<li id='magic-line'></li>");
    
    /* Cache it */
    var $magicLine = $("#magic-line");
    
    $magicLine
        .width($(".current_page_item").width())
        .css("left", $(".current_page_item a").position().left)
        .data("origLeft", $magicLine.position().left)
        .data("origWidth", $magicLine.width());
        
    $("#example-one li").find("a").hover(function() {
        $el = $(this);
        leftPos = $el.position().left;
        newWidth = $el.parent().width();
        
        $magicLine.stop().animate({
            left: leftPos,
            width: newWidth
        });
    }, function() {
        $magicLine.stop().animate({
            left: $magicLine.data("origLeft"),
            width: $magicLine.data("origWidth")
        });    
    });
    
    
    
    
    /*
        EXAMPLE TWO
    */
    
    $mainNav2.append("<li id='magic-line-two'></li>");
    
    var $magicLineTwo = $("#magic-line-two");
    
    $magicLineTwo
        .width($(".current_page_item_two").width())
        .height($mainNav2.height())
        .css("left", $(".current_page_item_two a").position().left)
        .data("origLeft", $(".current_page_item_two a").position().left)
        .data("origWidth", $magicLineTwo.width())
        .data("origColor", $(".current_page_item_two a").attr("rel"));
                
    $("#example-two a").hover(function() {
        $el = $(this);
        leftPos = $el.position().left;
        newWidth = $el.parent().width();
        $magicLineTwo.stop().animate({
            left: leftPos,
            width: newWidth,
            backgroundColor: $el.attr("rel")
        })
    }, function() {
        $magicLineTwo.stop().animate({
            left:...