hamburger menu html and css
/* Link to Codepen in source for PoC */
<style>
.container {
background: dodgerblue;
padding: 20px;
height: 70px;
}
#hamburger {
width: 40px;
height: 40px;
display: block;
position: relative;
float: right;
transform: rotate(0deg);
transition: .5s ease-in-out;
cursor: pointer;
}
#hamburger span {
display: block;
position: absolute;
height: 4px;
width: 100%;
background: white;
border-radius: 9px;
opacity: 1;
left: 0;
transform: rotate(0deg);
transition: .25s ease-in-out;
}
#hamburger span:nth-child(1) {
top: 0px;
}
#hamburger span:nth-child(2) {
top: 12px;
}
#hamburger span:nth-child(3) {
top: 24px;
}
#hamburger.open span:nth-child(1) {
top: 14px;
transform: rotate(135deg);
}
#hamburger.open span:nth-child(2) {
opacity: 0;
left: -60px;
}
#hamburger.open span:nth-child(3) {
top: 14px;
transform: rotate(-135deg);
}
</style>
<body>
<div class="container">
<div id="hamburger">
<span></span>
<span></span>
<span></span>
</div>
</div>
</body>
/*
Step-2
Style the navigation menu */
.topnav {
overflow: hidden;
background-color: #333;
position: relative;
}
/* Hide the
links inside the navigation menu (except for logo/home) */
.topnav #myLinks {
display: none;
}
/* Style navigation menu links */
.topnav a {
color: white;
padding: 14px 16px;
text-decoration: none;
font-size:
17px;
display: block;
}
/* Style the hamburger menu */
.topnav a.icon {
background: black;
display: block;
position: absolute;
right: 0;
top: 0;
}
/* Add a grey background color on
mouse-over */
.topnav a:hover {
background-color: #ddd;
color: black;
}
/* Style the
active link (or home/logo) */
.active {
background-color: #4CAF50;
color: white;
} 
<!--
Step-1
Load an icon library to show a hamburger menu (bars) on small screens -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Top Navigation Menu -->
<div class="topnav">
<a href="#home"
class="active">Logo</a>
<!-- Navigation links (hidden by default)
-->
<div id="myLinks">
<a href="#news">News</a>
<a href="#contact">Contact</a>
<a href="#about">About</a>
</div>
<!-- "Hamburger menu" / "Bar icon" to toggle the navigation
links -->
<a href="javascript:void(0);" class="icon" onclick="myFunction()">
<i class="fa fa-bars"></i>
</a>
</div> 
