I am trying to achieve a scrolling effect using jQuery. I have a background div set to 100% browser window size with overflow hidden. This has a large background image that is approx. 1500px x 2000px.
The effect I want is when the user scrolls down the page the background image moves at a percentage of the scrolled distance, so for every 200px scrolled down the page the image moves 10px in the same direction.
Can anyone point me in the right direction? Is this even possible? : ) Many thanks in advance.
UPDATE
I have since tried variations on the suggestion by @Capt Otis but I'm still struggling the code I am playing around with is as follows:
$(window).scroll(function(){
if($(this).scrollTop() > 200) {
$('#div').animate({'background-postion': '+=10px 0'}, 500);
}
});
Can anyone shed any light on what I am doing wrong?
Here you go. Background is set to 10% scroll. You can change the background scroll rate by changing the 10 in the code.
CSS
html, body{
height:100%;
min-height:100%;
margin:0;
padding:0;
}
.bg{
width:100%;
height:100%;
background: #fff url(..) no-repeat fixed 0 0;
overflow:auto;
}
<div class="bg">
<span>..</span>
</div>
JavaScript
$('.bg').scroll(function() {
var x = $(this).scrollTop();
$(this).css('background-position', '0% ' + parseInt(-x / 10) + 'px');
});
Check working example at http://jsfiddle.net/Vbtts/
Click this link for the full screen example: http://jsfiddle.net/Vbtts/embedded/result/
If you don't want to be hassled with the extra background div, here's my code I wrapped up from several examples:
$(window).scroll(function () {
setBackgroundPosition();
})
$(window).resize(function() {
setBackgroundPosition();
});
function setBackgroundPosition(){
$("body").css('background-position', "-" + (1920 - $(window).width()) / 2 + "px " + -(Math.max(document.body.scrollTop, document.documentElement.scrollTop) / 4) + "px");
}
The Math.max is required for cross-browser issues. Also replace '1920' with the width of your background image
body{
background-image:url(images/background.jpg);
background-position:center top;
background-repeat:no-repeat;
background-attachment:fixed;
}
This worked for me:
In js:
$(window).scroll(function() {
var x = $(this).scrollTop();
$('#main').css('background-position', '100% ' + parseInt(-x / 1) + 'px' + ', 0% ' + parseInt(-x / 2) + 'px, center top');
});
In css:
#main {
background: url(../img/img1.png) center top no-repeat, url(../img/img2.png) center top no-repeat, url(../img/img3.png);
background-repeat: no-repeat, no-repeat, repeat-x;
background-position: right top, left top, center top;
Where #main is the div whose background image I wanted to move. No need to have height: 100% for html, body.
This is a variation for multiple background images.