What is parallax scrolling
Parallax scrolling, also known as “Asymmetrical scrolling”, is a technique in computer graphics and web design, where background images is moved at a different speed than the foreground content while scrolling, creating an illusion of depth in a 2D scene and adding to the immersion.
Below you can find the CSS and HTML on how to create parallax effect
CSS
* {
box-sizing: border-box;
margin: 0;
padding: 0;
font-family: lato;
font-size: 16px;
line-height: 24px;
}
.wrap {
max-width: 980px;
margin: 0 auto;
}
.noncont {
padding: 50px 30px;
font-size: 22px;
}
.noncont h3 {
text-align: center;
font-size: 30px;
margin-bottom: 20px;
}
body,
html {
height: 100%;
}
.parallax {
/* The image used */
/* Set a specific height */
min-height: 100%;
/* Create the parallax scrolling effect */
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
position: relative;
}
.content {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
padding: 30px;
background: rgba(0, 0, 0, 0.5);
color: #fff;
}
.bot {
bottom: 20px;
top: auto;
}
.bgimg1 {
background-image: url("cycle.jpg");
}
.bgimg2 {
background-image: url("cycle2.jpg");
min-height: 500px;
}
@keyframes transdown {
0% {
top: -5px;
}
100% {
top: 5px;
}
}
.dwnar {
animation: transdown 800ms infinite alternate;
position: relative;
margin-top: -10px;
}
HTML
<body> <div class="parallax bgimg1"> <div class="content bot">SCROLL DOWN <i class="fa fa-angle-double-down dwnar" aria-hidden="true"></i> </div> </div> <div class="noncont wrap"> <h3>What is parallax effect in web design?</h3> <p>One fairly recent web design trend is parallax scrolling, which involves the background moving at a slower rate to the foreground, creating a 3D effect as you scroll down the page. It can sometimes be overwhelming, but when used sparingly it can provide a nice, subtle element of depth.</p> </div> <div class="parallax bgimg2"> <div class="content"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Numquam odio, architecto ducimus pariatur, vel eaque temporibus consequuntur placeat voluptas eius repudiandae dicta? Optio harum, laborum velit eligendi necessitatibus accusamus sed.</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Perspiciatis nisi fugit, veniam aliquam vero ab commodi, inventore molestias illum praesentium in est reiciendis impedit odio ut quaerat eligendi facilis ipsa.</p> </div> </div> <div class="noncont wrap"> <h3>What is parallax effect in web design?</h3> <p>The parallax effect has been around for years in classic video games, but it became a trend in the web design world. This cool effect is now commonly seen as part of the scrolling feature of a web page. It uses multiple backgrounds which seem to move at different speeds to create a sensation of depth (creating a faux-3D effect) and an interesting browsing experience. The term is derived from the Greek "parallaxis", meaning "alteration". Nearby objects have a larger parallax than more distant objects when observed from different positions, so parallax scrolling can be used to determine distances.</p> </div> </body>
Demo page: click here
Some mobile devices might have problem with “background-attachment: fixed”. However, you can use media queries to turn off the parallax effect for mobile devices by overriding with “background-attachment: scroll:.
You can adjust the height value of absolute positioned content in mobile devices using media queries.