JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">

            <ul id="nav">
                <li><a href="http://www.script-tutorials.com/">Home</a></li>
                <li><a class="hsubs" href="#">Menu 1</a>
                    <ul class="subs">
                        <li><a href="#">Submenu 1</a></li>
                        <li><a href="#">Submenu 2</a></li>
                        <li><a href="#">Submenu 3</a></li>
                        <li><a href="#">Submenu 4</a></li>
                        <li><a href="#">Submenu 5</a></li>
                    </ul>
                </li>
                <li><a class="hsubs" href="#">Menu 2</a>
                    <ul class="subs">
                        <li><a href="#">Submenu 2-1</a></li>
                        <li><a href="#">Submenu 2-2</a></li>
                        <li><a href="#">Submenu 2-3</a></li>
                        <li><a href="#">Submenu 2-4</a></li>
                        <li><a href="#">Submenu 2-5</a></li>
                        <li><a href="#">Submenu 2-6</a></li>
                        <li><a href="#">Submenu 2-7</a></li>
                        <li><a href="#">Submenu 2-8</a></li>
                    </ul>
                </li>
                <li><a class="hsubs" href="#">Menu 3</a>
                    <ul class="subs">
                        <li><a href="#">Submenu 3-1</a></li>
                        <li><a href="#">Submenu 3-2</a></li>
                        <li><a href="#">Submenu 3-3</a></li>
                        <li><a href="#">Submenu 3-4</a></li>
                        <li><a href="#">Submenu 3-5</a></li>
                    </ul>
                </li>
                <li><a href="#">Menu 4</a></li>
                <li><a href="#">Menu 5</a></li>
                <li><a href="#">Menu 6</a></li>
                <li><a href="http://www.script-tutorials.com/css3-multicolor-menu/">Back</a></li>
            </ul>

        </div>
    </body>

CSS

#nav,#nav ul {
    list-style: none outside none;
    margin: 0;
    padding: 0;
}
#nav {
    display: table;
    padding: 10px;
    position: relative;
}
#nav ul {
    background-color: #046bc2;
    border:1px solid #fff;
    border-radius: 0 5px 5px 5px;
    border-width: 0 1px 1px;
    box-shadow: 0 5px 5px rgba(0, 0, 0, 0.5);
    left: -9999px;
    overflow: hidden;
    padding: 20px 0 10px;
    position: absolute;
    top: -9999px;

    -moz-transform: scaleY(0);
    -ms-transform: scaleY(0);
    -o-transform: scaleY(0);
    -webkit-transform: scaleY(0);
    transform: scaleY(0);

    -moz-transform-origin: 0 0;
    -ms-transform-origin: 0 0;
    -o-transform-origin: 0 0;
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;

    -moz-transition: -moz-transform 0.1s linear;
    -ms-transition: -ms-transform 0.1s linear;
    -o-transition: -o-transform 0.1s linear;
    -webkit-transition: -webkit-transform 0.1s linear;
    transition: transform 0.1s linear;
}
#nav li {
    float: left;
    position: relative;
}
#nav li a {
    color: #FFFFFF;
    display: block;
    font-size: 16px;
    padding: 7px 20px;
    text-decoration: none;
}
#nav li:hover > a {
    background-color: #046bc2;
    border-radius: 5px 5px 5px 5px;
    border: 1px;
    color: #FFFFFF;
}
#nav li:hover > a.hsubs {
    border-radius: 5px 5px 0 0;
}
#nav li:hover ul.subs {
    left: 0;
    top: 34px;
    width: 180px;

    -moz-transform: scaleY(1);
    -ms-transform: scaleY(1);
    -o-transform: scaleY(1);
    -webkit-transform: scaleY(1);
}
#nav ul li {
    width: 100%;
}
#nav ul li:hover > a {
    background-color: #222222 !important;
    border-radius: 5px 5px 5px 5px;
}