JSFiddle - React, Tailwind, and code Playground
HTML
<nav id="nav">
<ul>
<li><a href="#">Item21</a>
<ul>
<li><a href="#">Sub1</a>
<li><a href="#">Sub1</a>
<li><a href="#">Sub1</a>
<ul>
<li><a href="#">Sub2</a></li>
<li><a href="#">Sub2</a></li>
<li><a href="#">Sub2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</nav>
CSS
#nav {
height: auto;
width: auto;
}
#nav ul {
margin: 0px;
padding: 0px;
list-style-type: none;
}
#nav ul li {
float: left;
position: relative;
}
#nav ul li a {
line-height: 30px;
text-decoration: none;
text-align: center;
display: block;
width: 100px;
height: 30px;
border: thin solid #999;
color: #FFF;
background-color: #0CF;
-webkit-transition: all 1s;
-moz-transition: all 1s;
-ms-transition: all 1s;
-o-transition: all 1s;
transition: all 1s;
}
#nav ul li a:hover {
background-color: #0C3;
}
#nav ul li ul {
position: absolute;
visibility: hidden;
-webkit-transition: all 1s linear 0s;
-moz-transition: all 1s linear 0s;
-ms-transition: all 1s linear 0s;
-o-transition: all 1s linear 0s;
transition: all 1s linear 0s;
overflow: hidden;
height: 0px;
}
#nav ul li:hover ul {
height: 100px;
visibility: visible;
overflow: visible;
}
#nav ul li ul li {
-ms-transition: all 1s;
-o-transition: all 1s;
}
#nav ul li ul li a {
background-color: #FF881A;
-webkit-transition: all 1s;
-moz-transition: all 1s;
-ms-transition: all 1s;
-o-transition: all 1s;
transition: all 1s;
}
#nav ul li ul li a:hover {
background-color: #C30;
}
#nav ul li ul li ul {
position: absolute;
left: 102px;
top: 0px;
display: none;
-webkit-transition: all 1s ease 0s;
-moz-transition: all 1s ease 0s;
-ms-transition: all 1s ease 0s;
-o-transition: all 1s ease 0s;
transition: all 1s ease 0s;
overflow: hidden;
visibility: hidden;
width: 0px;
}
#nav ul li ul li ul li {
float: left;
position: relative;
}
#nav ul li ul li:hover ul {
width: 104px;
display: block;
overflow: visible;
visibility: visible;
}