JSFiddle - React, Tailwind, and code Playground

HTML

<div class="menushkabg">
<ul class="sky-mega-menu sky-mega-menu-anim-scale">
<li><a href="/" title="">Менюшка</a></li>
<li><a href="/" title="">Менюшка</a></li>
<li><a href="/" title="">Менюшка</a></li>
<li><a href="/" title="">Менюшка</a></li>
<li><a href="/" title="">Менюшка</a></li>
</ul>
</div>

CSS

.menushkabg{
background-color:  #4C3F59;
width: 100%;
height: 55px;
line-height: 55px; 
}

.sky-mega-menu,
.sky-mega-menu * {
margin: 0;
padding: 0;
outline: none;
border: 0;
background: none;
}

.sky-mega-menu {
position: relative;
z-index: 999;
font-size: 0;
line-height: 0;
text-align: right;
margin-left: 270px;
}
.sky-mega-menu:after {
content: '';
display: table;
clear: both;
}
.sky-mega-menu li {
position: relative;
display: inline-block;
float: left;
padding: 5px;
font-size: 14px;
text-transform: uppercase;
line-height: 45px;
white-space: nowrap;
text-align: center;
}
.sky-mega-menu li a {
display: block; 
padding: 0px 17px 0px 17px; 
color: #ffffff; 
text-decoration: none; 
font-size: 14px; 
-webkit-transition: -webkit-transform 0.2s, opacity 0.3s;
-moz-transition: -moz-transform 0.2s, opacity 0.3s;
-ms-transition: -ms-transform 0.2s, opacity 0.3s;
-o-transition: -o-transform 0.2s, opacity 0.3s;
transition: transform 0.2s, opacity 0.3s;
}
.sky-mega-menu li > div {
position: absolute;
z-index: 1000;
top: 100%;
left: -9999px;
margin-top: -1px;
-webkit-box-shadow: 0px 5px 15px 0px rgba(50, 50, 50, 0.60);
-moz-box-shadow:    0px 5px 15px 0px rgba(50, 50, 50, 0.60);
box-shadow:         0px 5px 15px 0px rgba(50, 50, 50, 0.60);
opacity: 0;
-o-transform-origin: 0% 0%;
-ms-transform-origin: 0% 0%;
-moz-transform-origin: 0% 0%;
-webkit-transform-origin: 0% 0%;
-o-transition: -o-transform 0.4s, opacity 0.4s;
-ms-transition: -ms-transform 0.4s, opacity 0.4s;
-moz-transition: -moz-transform 0.4s, opacity 0.4s;
-webkit-transition: -webkit-transform 0.4s, opacity 0.4s;
border-top: 1px solid #4C3F59;
border-left: 1px solid #4C3F59;
border-right: 1px solid #4C3F59;
border-bottom: 1px solid #4C3F59;
}
.sky-mega-menu li > div:after {
content: '';
position: absolute;
bottom: 100%;
left: 0;
width: 100%;
}
.sky-mega-menu li > div:before {
content: '';
position: absolute;
bottom: 100%;
left: 24px;
}
.sky-mega-menu li:hover > a,
.sky-mega-menu li.current > a {
background: ...