JSFiddle - React, Tailwind, and code Playground

by Andrey

HTML

<div class="mybar" id="mybar"></div>

<div id="mySidenav" class="sidenav">
  <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">&times;</a>
  <a href="#">About</a>
  <a href="#">Services</a>
  <a href="#">Clients</a>
  <a href="#">Contact</a>
</div>

<h2>Animated Sidenav Example</h2>


<script>
function openNav() {
    document.getElementById("mySidenav").style.width = "250px";
}

function closeNav() {
    document.getElementById("mySidenav").style.width = "0";
}
document.getElementById("mybar").addEventListener("mouseenter", function(e){
	document.getElementById("mySidenav").style.width = "250px";
});
document.getElementById("mybar").addEventListener("mouseleave", function(e){
console.log(e.target.id, document.getElementById("mybar").id);
if(e.target.id == 'mybar'){
	e.preventDefault;
    return;
}
	document.getElementById("mySidenav").style.width = "0";
});
document.getElementById("mySidenav").addEventListener("mouseleave", function(e){
	document.getElementById("mySidenav").style.width = "0";
});
</script>

CSS

body {
    font-family: "Lato", sans-serif;
    width: 100%;
}

.sidenav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
}

.sidenav a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

.sidenav a:hover, .offcanvas a:focus{
    color: #f1f1f1;
}

.sidenav .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
}

.mybar {
	position: fixed;
    width:20%;
    height: 100%;
    /*background: #fef;*/
}

@media screen and (max-height: 450px) {
  .sidenav {padding-top: 15px;}
  .sidenav a {font-size: 18px;}
}