In this tutorial I’ve setup an example of how to add an animated sticky header to a website using almost pure CSS with just a touch of javascript.
The header becomes ‘sticky’ when the top header bar is scrolled out of view, in the demo this is 40px but can be changed using the LESS variables at the top of the /content/site.less file.
Here it is in action:
(See on Plunker at https://plnkr.co/edit/v8pxS7?p=preview)
The html is fairly standard with three main sections (divs) for the header, body and footer. The header section is split into two sections (‘header-top’ and ‘header-main’) which are used to apply the styles for the sticky header functionality.
The less.js script is included to compile the LESS stylesheet into CSS on the client side, this is required for the demo to work in plunker but it’s not necessary if you compile the LESS stylesheet on the server or pre compile it using a build tool such as Gulp or Grunt.
<html>
<head>
<title>CSS3 - Sticky Header on Scroll Example</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<link href="content/site.less" rel="stylesheet/less" type="text/css" />
<script src="//cdnjs.cloudflare.com/ajax/libs/less.js/2.5.3/less.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="js/site.js"></script>
</head>
<body>
<div id="header">
<div class="header-top">
<div class="social-icons">
<ul class="reset">
<li><a href="#" class="fa fa-facebook"></a></li>
<li><a href="#" class="fa fa-twitter"></a></li>
<li><a href="#" class="fa fa-google-plus"></a></li>
<li><a href="#" class="fa fa-github"></a></li>
<li><a href="#" class="fa fa-pinterest"></a></li>
</ul>
</div>
</div>
<div class="header-main">
<div class="nav">
<ul class="reset">
<li><a href="#" class="current">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Our Work</a></li>
<li><a href="#">Services</a></li>
<li><a href="#">Blog</a></li>
<li><a href="#">Contact Us</a></li>
</ul>
</div>
</div>
</div>
<div id="body">
<h1>CSS3 - Sticky Header on Scroll Example</h1>
<p>
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</p>
<p>
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</p>
<p>
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</p>
<p>
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</p>
<p>
Praesent dignissim elementum nunc vel ullamcorper. Curabitur ut auctor diam, vel ullamcorper arcu. Nam non mattis erat. Aliquam erat volutpat. Duis pellentesque, ante ut laoreet convallis, massa urna congue velit, eu eleifend mi orci vitae mauris. Curabitur rutrum dui non fermentum consectetur. Sed est arcu, ornare quis auctor et, suscipit quis mi. Sed diam ex, interdum non risus sed, aliquam ullamcorper arcu. Proin ut lorem in enim auctor malesuada.
</p>
<p>
Maecenas scelerisque sodales sodales. Suspendisse nec arcu et mi aliquam pulvinar. Morbi purus nisl, commodo eget tristique sit amet, commodo vitae dolor. Maecenas vel ultricies dolor. Morbi lacinia, nunc maximus faucibus pharetra, nibh nulla finibus magna, eu interdum magna metus mollis tortor. Morbi ex ex, dignissim et ex a, euismod vestibulum libero. Integer orci felis, aliquet ullamcorper euismod et, gravida sit amet elit. Nunc tristique lacus in neque mollis varius. In dapibus erat eros, et pellentesque odio lacinia bibendum. Vivamus dui nulla, accumsan a justo id, scelerisque condimentum odio. Curabitur euismod volutpat nunc.
</p>
<p>
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</p>
<p>
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</p>
<p>
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</p>
</div>
<div id="footer">
<p>
<a href="https://wpproonline.com/css3-sticky-header-on-scroll/" target="_top" rel="noopener noreferrer">CSS3 - Sticky Header on Scroll Example</a>
</p>
<p>
<a href="https://wpproonline.com/" target="_top" rel="noopener noreferrer">WP Pro Online</a>
</p>
</div>
</body>
</html> The LESS styles are split up into sections to make them easier to follow, I’ve also created variables for the sticky header values at the top of the file, you can edit these variables to change the size of the header sections.
There’s also a handful of styles that are purely for look and feel and aren’t related to the sticky header functionality, I left them in so the demo looks better and is a bit more of a real world example.
/* VARIABLES
--------------------------------------------*/@header-top-height: 40px; /* height of the top section of the header */@header-main-height: 100px; /* default height of the main section of the header */@header-sticky-height: 60px; /* height of the header when it's sticky */
/* GLOBAL DEFAULTS
--------------------------------------------*/body {
padding: 0;
margin: 0;
font-family: Arial;
}
a {
transition: color 0.3s;
}
/* GENERAL CLASSES
------------------------------------------*/ul.reset {
margin: 0;
padding: 0;
> li {
list-style: none;
}
}
/* HEADER SECTION
--------------------------------------------*/#header {
position:absolute;
top:0;
width:100%;
.header-top {
height: @header-top-height;
line-height: @header-top-height;
background: #1b2327;
color: #b0bec5;
.social-icons {
float: right;
ul {
li {
float: left;
margin-left: 5px;
font-size: 20px;
a {
color: inherit;
text-decoration: none;
display: inline-block;
width: 40px;
text-align: center;
line-height: 40px;
&:hover {
color: #fff;
}
}
}
}
}
}
.header-main {
height: @header-main-height;
line-height: @header-main-height;
background: #263238;
padding: 0 20px;
box-sizing: border-box;
/* animate the transition between normal header and sticky header */ transition: height .3s, line-height .3s;
.nav {
float: left;
ul {
li {
float: left;
a {
color: #cfd8dc;
text-decoration: none;
text-transform: uppercase;
display: inline-block;
padding: 0 10px;
&.current {
color: #80cbc4;
}
&:hover {
color: #fff;
}
}
}
}
}
}
}
/* BODY SECTION
--------------------------------------------*/#body {
padding-top: @header-top-height + @header-main-height;
padding-left: 15px;
padding-right: 15px;
background: #eee;
transition: padding-top .3s;
}
/* FOOTER SECTION
--------------------------------------------*/#footer {
background: #1b2327;
padding: 20px;
text-align: center;
a {
color: #b0bec5;
text-decoration: none;
&:hover {
color: #fff;
}
}
}
/* STICKY HEADER STYLES
--------------------------------------------*/body.sticky-header {
#header {
.header-main {
height: @header-sticky-height;
line-height: @header-sticky-height;
position: fixed;
top:0;
width: 100%;
}
}
#body {
padding-top: @header-top-height + @header-sticky-height;
}
}
Javascript is used to toggle the ‘sticky-header’ class on the body tag when the header top section is scrolled in and out of view using the jQuery .scrollTop() function. The ‘sticky-header’ class is used in the stylesheet above to switch on and off the sticky header functionality.
$(window).scroll(function () {
// add 'sticky-header' class to the body tag when the header top is scrolled out of view
$('body').toggleClass('sticky-header', $(this).scrollTop() > $('.header-top').height());
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