Create Background Scrolling Effect with jQuery

Create Background Scrolling Effect with jQuery


Create Background Scrolling Effect with jQuery

Introduction

Greeting, today we are going to make a scrolling background effect. This script will move the background of any html tag, either vertically or horizontally. I used this script in one of my project which has a blue sky with clouds and it makes the whole website came alive. I think that's pretty impressive.

In this tutorial, we're not only go through how to make it, we will have it in plugin as well which allow user to customize the speed of the movement and direction (vertically, horizontally and diagonally). Alright, the concept behind this animation is really simple. We will use the background-position attribute to move the background, very easy right?

1. HTML

There is nothing about HTML. Basically we will put the background image in the cloud div and animate the background image.

	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Scrolling Backgorund</title>
<div class="clouds">

		</div>
	

2. CSS

I think, from all of my tutorial, this would be the shortest and simplest CSS code.

body {
	margin:0;
	padding:0;
	background:#fff; 	
}

.clouds {
	width:300px; 
	height:300px; 
	margin:10px; 
	border:2px solid #ccc;
	background:#3e83c8 url(images/bg_clouds.png) repeat-x 0 bottom; 
}

3. Javascript

Alright, this is the part that makes everything alive! We will make it more configurable. We can adjust the speed and the direction. Of course, to make sure you understand what it does, I have put comments in each line of code.

$(document).ready(function () {
    // speed in milliseconds
	var scrollSpeed = 70;

	// set the direction
	var direction = 'h';

	// set the default position
	var current = 0;

	function bgscroll(){

    	// 1 pixel row at a time
	    current -= 1;
   
	    // move the background with backgrond-position css properties
	    $('div.clouds').css("backgroundPosition", (direction == 'h') ? current+"px 0" : "0 " + current+"px");
   
	}

	//Calls the scrolling function repeatedly
	var init = setInterval("bgscroll()", scrollSpeed);	
});

4. The Plugin

I'm not an expert in creating plugins but thanks to my friend from web developer juice, with his amazing skill, he managed to convert the whole script in a very short time and here is the code. He has got some interesting tutorials and articles as well. Make sure you check out his website. :)

(function() {
	$.fn.bgscroll = $.fn.bgScroll = function( options ) {
		
		if( !this.length ) return this;
		if( !options ) options = {};
		if( !window.scrollElements ) window.scrollElements = {};
		
		for( var i = 0; i

Usage

So, this is how you use it. Make sure you've included jQuery framework and the bgscroll plugin. It accepts two properties:

  • scrollSpeed : speed of the movement
  • direction : direction can be either "v", "h" or "d" (vertical, horizontal or diagonal)
$( function() {
	$('.clouds1').bgscroll({scrollSpeed:10 , direction:'h' });
	$('.clouds2').bgscroll({direction:'d'});
});
Check out the Plugin in action

Conclusion

I hope the tutorial and plugin will be useful for you. If you really like this article and want to support me, please share it with your friends :) Thanks!

Author: Kevin Liew

Kevin Liew is a web designer and developer and keen on contributing to the web development industry. He loves frontend development and absolutely amazed by jQuery. Feel free to say hi to me, or follow @quenesswebblog on twitter.

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43 comments

mulus
Mon, 29th October 2012
I use this script on my site (www.meliskent1.com) and it works fine for me but on iphone it crashes the explorer Reply
Tiago Leal
Thu, 27th June 2013
How do I make it on wordpress? I want do use in my background site. Reply
Kieu
Mon, 21st July 2014
Thank you for the tutorial. I was wondering how I would be able to only have the image scroll vertically halfway and stop. I don't want the image to repeat, and I don't want it to disappear off the screen either.

Thanks,
Kieu Reply

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