I really like the way each background section overlaps each other which scrolling down. I have seen it done a lot:
here is the link : http://www.soleilnoir.net/believein/
Any ideas how to achieve the similar effect?
Thanks
This effect is called parallax.
Here are some links related to this effect:
a great demo from Nike http://www.nike.com/jumpman23/aj2012/
a collection of parallax http://webdesignledger.com/inspiration/21-examples-of-parallax-scrolling-in-web-design (make sure to see each example, some are really great ! ex: http://benthebodyguard.com/index.php http://www.siebennull.com/ http://janploch.de/)
Mercedez Class A web site http://a-class.mercedes-benz.com/com/en/index.html#!/?s=live (not really parallax but still great)
a tutorial on how to make an image slider using parallax effect http://tympanus.net/codrops/2011/01/03/parallax-slider/
another tutorial with different effects http://tympanus.net/codrops/2012/03/15/parallax-content-slider-with-css3-and-jquery/
a library to do parallax https://github.com/cameronmcefee/plax
another library https://github.com/markdalgleish/stellar.js
You may also like this:
http://johnpolacek.github.com/scrollorama/
http://joelb.me/scrollpath/
You could achieve that through a combination of watching the scroll offset position and then animating different elements based on that scroll position. You would set an event listener and at certain positions fire functions to animate an element onto the page.
If using jQuery, something like this:
$(document).on("scroll", checkScrollPosition);
function checkScrollPosition() {
var scrollPos = $(window).scrollTop();
switch (scrollPos) {
case (500):
doSomething();
break;
case (1000):
doSomethingElse();
break;
}
}
function() doSomething {
// use animate to animate element(s) at 500
}
function() doSomethingElse {
// use animate to animate element(s) at 1000
}
I'm sure that could be optimized better than that, but that should be enough to get started.
Related
I want to show an animating arrow the first time a web page loads, and disable it when the user scrolls.
Normally I could do something like this:
jQuery(window).scroll(function() {
jQuery('.arrow').css("display", "none");
});
However my site has a few plugins to allow horizontal scrolling which I think is preventing this from working.
Is there a way to hide the animation that is not based on scrolling detection?
http://codepen.io/sol_b/pen/ORGKbP
Thanks.
EDIT: the plugins I'm using are jquery kinetic and jquery mousewheel.
You can do the following in your jquery.
jQuery(window).scroll(function() {
document.getElementById("animation").style.WebkitAnimationPlayState = "paused";
});
This will stop your animation while scrolling, but this will cause an issue that the animation won't be played when the scroll is stopped. Fot that you can use this function
$.fn.scrollStopped = function(callback) {
var that = this, $this = $(that);
$this.scroll(function(ev) {
clearTimeout($this.data('scrollTimeout'));
$this.data('scrollTimeout', setTimeout(callback.bind(that),250, ev));
});
};
And then on scroll stop you can start the animation again.
$(window).scrollStopped(function(ev){
document.getElementById("animation").style.WebkitAnimationPlayState = "running";
});
If the plugin, that allows horizontal scrolling, has an official documentation, you should look for a callback method. Like when the users is scrolling this called gets called. In the callback you could then hide the arrow (or .fadeOut() imo)...
I was able to fix this by replacing 'window' with my content wrapper. Like this:
jQuery('#wrapper').scroll(function() {
jQuery('.arrow').css("display", "none");
});
I use this parallax, but can't disable it on mobile?
I found some methods like this:
scene = $('#scene').parallax();
scene.parallax('disable');
But it didn't work. Can anybody help?
I would rather go in different direction. Instead of making something disable on small screens make it working only on larger devices:
if ($(window).width() > 640) { //set up breaking point
$('#scene').parallax(); // this or any other code you need
}
If you want to disable parallax straight after it's been initialized you should wrap your scene.parallax('disable'); in a setTimeout function. If you look at the source code of Parallax.js you will see that there's supportDelay: 500 value which is used as an argument in enable function. According to that your code for disabling would look like this:
var scene = $('#scene').parallax();
setTimeout(function () {
scene.parallax('disable');
}, 500);
Update:
Just found an article that explains different perspective on disabling parallax.js on small devices.
This is certainly going to be an easy one but I can't get my head around what I am doing wrong...
I am trying to do a hover effect on a UL that affects a link within one of the UL LI's.
My current code looks like this:
$("ul.punchlines").hover(function () {
$(this).find("li a.light-grey-gradient").animate({'width' : '60%','top':'-65px'});
});
$("ul.punchlines").mouseleave(function () {
$(this).find("li a.light-grey-gradient").animate({'width' : '30%','top':'0px'});
});
This technically works as it gives the effect that the base of the element to be scaled remains in place and scales up from the bottom however it does it in two stages, I am trying to get this effect to happen all in one motion so it is a seamless scale and move.
I can do this easily with basic CSS3 transitions but as it is not supported in IE9 I am trying to use jQuery to allow for maximum browser support.
Can anyone offer a little support firstly about how I get the animation to happen in one motion (not staggered) and secondly if this is the right approach? I am new to jquery and only just getting my hands dirty with it :-)
Please see JQuery hover api:
http://api.jquery.com/hover/
also make sure that your "li" have absolute position.
$("ul.punchlines").hover(function () {
$(this).find("li a.light-grey-gradient").animate({'width' : '60%','top':'-65px'});
}, function () {
$(this).find("li a.light-grey-gradient").animate({'width' : '30%','top':'0px'});
});
See the effect in the photos in the article here:
http://www.popsci.com/science/article/2012-11/and-after-images-show-hurricane-sandys-devastation
Does anyone have any idea how that's done? I suppose I could make two frames with adjustable width within a fixed frame, but what about the handle? And the way the frame line and handle brighten and enlarge when you mouse over? Hover event, to be sure, but what kind of hover event?
It is very simple. You have 2 DIVs with the 2 different images (as background-image in css) overlapping eachother (In e.g absolute positioning.) (Perhaps the "Before" picture above)
Then you have a slider and when dragged it decreases the overlapping DIV's width, making the underlaying DIV show!
This functionallity can be found in a jQuery plugin called "Before/After"
Link: jQuery BEFORE / AFTER
You could of course just write your own that isn't dependant on jQuery UI.
;(function($){
$.fn.slidingThingamajig = function () {
return this.each(function(){
var $this = $(this);
$this.find('.handle')
.css({cursor:'ew-resize'}) // Here's your fancy cursor with directional arrows
.on('mousedown', function(e) {
$this.addClass('resizable');
$this.parents().on('mousemove', function (e) {
$('.resizable').css({width:e.pageX - $('.resizable').offset().left});
}).on('mouseup', function(e) {
$('.resizable').removeClass('resizable');
});
e.preventDefault();
});
});
}
})(jQuery);
You would probably need to tweak this a little, but it's mostly all there.
See the following fiddle:
[edit: updated fiddle => http://jsfiddle.net/NYZf8/5/ ]
http://jsfiddle.net/NYZf8/1/ (view in different screen sizes, so that ideally the image fits inside the %-width layouted div)
The image should start the animation from the position where it correctly appears after the animation is done.
I don't understand why the first call to setMargin() sets a negative margin even though the logged height for container div and img are the very same ones, that after the jqueryui show() call set the image where I would want it (from the start on). My guess is that somehow the image height is 0/undefined after all, even though it logs fine :?
js:
console.log('img: ' + $('img').height());
console.log('div: ' + $('div').height());
$('img').show('blind', 1500, setMargin);
function setMargin() {
var marginTop =
( $('img').closest('div').height() - $('img').height() ) / 2;
console.log('marginTop: ' + marginTop);
$('img').css('marginTop', marginTop + 'px');
}
setMargin();
Interesting problem...after playing around with your code for a while (latest update), I saw that the blind animation was not actually firing in my browser (I'm testing on Chrome, and maybe it was firing but I wasn't seeing it as the image was never hidden in the first place), so I tried moving it inside the binded load function:
$('img').bind('load', function() {
...
$(this).show('blind', 500);
});
Now that it was animating, it seemed to 'snap' or 'jump' after the animation was complete, and also seemed to appear with an incorrect margin. This smacks of jQuery not being able to correctly calculate the dimensions of something that hadn't been displayed on the screen yet. On top of that, blind seems to need more explicit dimensions to operate correctly. So therein lies the problem: how to calculate elements' rendered dimensions before they've actually appeared on the screen?
One way to do this is to fade in the element whose dimensions you're trying to calculate very slightly - not enough to see yet - do some calculations, then hide it again and prep it for the appearance animation. You can achieve this with jQuery using the fadeTo function:
$('img').bind('load', function() {
$(this).fadeTo(0, 0.01, function() {
// do calculations...
}
}
You would need to work out dimensions, apply them with the css() function, blind the image in and then reset the image styles back to their original states, all thanks to a blind animation that needs these dimensions explicitly. I would also recommend using classes in the css to help you manage things a little better. Here's a detailed working example: jsfiddle working example
Not the most elegant way of doing things, but it's a start. There are a lot more easier ways to achieve seemingly better results, and I guess I just want to know why you're looking to do image blinds and explicit alignment this way? It's just a lot more challenging achieving it with the code you used...anyways, hope this helps! :)