How do I change a background position with css3 animation? - animation

Lets say I have a div element, with a background in position: 0%; how would I change the position to e.g position: 100%; but with keyframes on hover
I can't seem to use keyframes properly, it never works and I have all the latest browsers.
Thanks.

If you just want to animate background position on hover it's a lot easier to use a transition instead of keyframe animations. See this fiddle for an example: http://jsfiddle.net/hfXSs/
If you want to put in the extra effort of making it an animation you'll have to set the animation-play-state on the div to 'paused' and change it to 'running' on hover. See the spec on pausing animations here: http://dev.w3.org/csswg/css3-animations/#the-animation-play-state-property-
EDIT: I was bored so here's the same thing using keyframe animations: http://jsfiddle.net/wGRg5/
Obviously, the fiddle has the problem that when you aren't hovering over the div the animation pauses which is probably not the desired effect.

Some Code, looks like webkit only at this point in time.
.box {
display:block;
height:300px;
width:300px;
background:url('http://lorempixum.com/300/300') no-repeat;
background-position:-300px;
-webkit-transition:background-position 1s ease;
}
.box:hover{
background-position:0px;
}
Via: http://jsfiddle.net/hfXSs/
More here: http://css-tricks.com/parallax-background-css3/

Related

z-index doesn't seem to work normally at smaller sizes

I have some fairly complex stacking arrangements going on in a site I'm working on. With a background image on a div being a gradient that overlays an image within it with a lower zindex. Like this:
So, this works fine at larger widths. When the width is smaller the image appears over the gradient background, like this:
Something's happening and I can't figure out what. I'm using twitter Bootstrap 2.3.0 as a framework. Link: http://www.osullivans-pubs.com/draft
EDIT: I'm pretty sure the problem is something to do with having a negative z-index on the image (#back img). But having the z-index at zero means the image appears above the gradient...
UPDATE: I worked it out. It's not really possible to have an element with a background image overlap a child element. So I created an absolutely positioned element before (and seperate from) the container and applied the appropriate zindex to that. That fixed it.
you have to add a z-index in liquid-slider.css file below is the code...
.liquid-slider-wrapper {
margin: 0 auto;
clear: both;
overflow: auto;
position: relative;
width: 1110px !important;
z-index: 20;
}

Button Hover Effect

I'm quite new to CSS and web programming. What I'm trying to do is add a hovering effect for a button. I'm doing this by using 2 images.
There is a button called download and in hover code I add:
.button:hover{
background-image:url(images/button2.png);
}
The problem is the button takes time to load ie: on hover there is a delay to show the button. How can i solve this?
EDIT: I tried using preloading,but there is also a kind of delay
div#preloadedImages
{
width: 0px;
height: 0px;
background-image: url(images/button2.png);
}
You should use an image sprite to get rid of the delay. A sprite is one larger file that contains multiple images. Your button will have it's background set to sprite.png file. You can then change the background-position property to shift the positioning of your sprite.
On the other note - why do you use images for buttons? Most buttons can be done in pure CSS with some fallbacks for older browsers.
Create a single image out of the two images (which is called a sprite)
Here is a working example with an animation as well to show you how it works.
Click here >>> FIDDLE
Then set your background position to to show the normal state of the background image
.button {
width: 150px;
height: 50px;
background-image: url('image-sprite.jpg');
background-position: left top;
}
Then on your hover css, just move the background image to show the lower part of it
.button:hover {
background-position: left bottom;
}
Keep your current css and other stuff as they are and add an <img> component at anywhere of your page and make it hidden to load the image initially.
<img src="images/button2.png" style="display:none;"/>

Colorbox plugin borderless view

I need use a modal plugin and colorbox looks great.
How do I load it w/o the rounded borders?
Given my page size, the thick border taking too much space.
Anyway to hide it or make it thinner and hide the border if needed on some calls?
You can hide the borders in easy way:
$("#cboxTopLeft").hide();
$("#cboxTopRight").hide();
$("#cboxBottomLeft").hide();
$("#cboxBottomRight").hide();
$("#cboxMiddleLeft").hide();
$("#cboxMiddleRight").hide();
$("#cboxTopCenter").hide();
$("#cboxBottomCenter").hide();
and add class with border style if you want with this way :
.thin_border {
border: 10px solid blue;
border-radius: 10px;
margin: 10px;
box-shadow: 0 0 25px blue;
}
and then add it with jquery
$("#cboxContent").addClass("thin_border");
I think colorbox isn't actually using the property "border" to get that huge black border going around. It seems like its being incased in a 3 x 3 div which uses images to create that border. Im sure you could remove it but its going to require messing with the actual colorbox javascript. You could try messing with the CSS as well.
You consider looking into a diffrent plugin like lightbox2 or shadowbox? I personally use slimbox (nice little clone of lightbox). If you want to mess with the code go for it. Otherwise I would just pick a diffrent plugin.

animate div flash light

how to animate plus one div like this site...i just copy and paste css but nothing happend.
http://vbiran.ir
please help me to make somthing like this
my code is somthing like this googleplus{position:absolute;top:100px;right:310px;background:#F3EBDB;border:1px solid #C3B8A3;padding:14px 6px;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;animation:googleplus 2s infinite;-moz-animation:googleplus 2s infinite;-webkit-animation:googleplus 2s infinite;font-family:BKoodakBold !important}
That is made with CSS3 animations. You specify the name of the animation, then describe it with #keyframes property. See here for further details, and here is working example.

Webkit not respecting overflow:hidden with border radius

I have a lovely Star Trek Red Alert animation using CSS3. One of my parent elements has a border-radius along with overflow:hidden so that any content is cropped to the shape of the border radius.
This all works fine in Firefox but Webkit browsers leave some child elements hanging outside the cropped area.
Here is my code:
http://jsfiddle.net/doublewombat/EqK6R/embedded/result/
The div with the class name curvedEdges has the border-radius and overflow:hidden. However the blocks left & right of the 'Alert' text hang outside of this radius, even though they are child elements of curvedEdges. Or in plain English, the left and right edges of the animation should be slightly curved (as in Firefox), not dead straight.
So is this a bug in Webkit, or have I got something wrong?
Here it is on YouTube if you don't have a Webkit browser handy...
http://www.youtube.com/watch?v=3vyVy21nWsE
Firstly, what a cool demo!
I had a look around and it seems a problem not on you are having. The second answer to someone else's problem fixed it for me, although this doesn't work for safari. The fix is to use masking:
-webkit-mask-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAA5JREFUeNpiYGBgAAgwAAAEAAGbA+oJAAAAAElFTkSuQmCC);
The accepted answer to that same question has another fix, which I think could really help you out, but I couldn't seem to get the right combination of elements and border-radius.
I'd been trying to do the same, and was using border-radius to mask elements to a circle.
I was able to use masking and a radial gradient to achieve the desired affect in Safari 6.0.3 (with transitions in position and size).
Here's the single line of code I added to the container (masking) element:
-webkit-mask-image: -webkit-radial-gradient(circle, white, black);
I thought I would have to use hard color stops, as follows, to get the hard edge:
-webkit-mask-image: -webkit-radial-gradient(circle, white 100%, black 100%);
However, it works the same without (perhaps someone can enlighten us on why). The clipping is not as smooth as with border-radius, but it beats the heck out of the image unpredictably exceeding the bounds.
You may need to adjust this for use with older versions of Safari/Chrome etc., I haven't tested it on different versions (aka YMMV).
It appears to be a browser issue as reported on: https://code.google.com/p/chromium/issues/detail?id=157218
Basically, when you apply animation to an element, the browser will handle it in the GPU (Graphics Processing Unit) for performance reasons, while the rest is handled by the CPU. That ends up rendering the animation above the mask.
As a workaround you can try adding an imperceptible transform property, that will also trigger GPU handling for the mask element, promoting it to the same level of the animation:
#redAlert .curvedEdge {
-webkit-transform: rotate(0.000001deg);
}
I guess it may vary depending on browser version, but these other values have also been reported to trigger GPU handling: rotate(0), translateZ(0)
It seems like its an issue with the GPU/hardware compositing. transform: translateZ(0); should fix the issue as well. For more information on this, read http://aerotwist.com/blog/on-translate3d-and-layer-creation-hacks/
-webkit-transform: translateZ(0);
transform: translateZ(0);
I have included vendor prefixes but you can remove them if you want.
Seems its a mixed working fix:
.wrap {
-webkit-transform: translateZ(0);
-webkit-mask-image: -webkit-radial-gradient(circle, white 100%, black 100%);
}
http://jsfiddle.net/qWdf6/82/
You could put an absolute positioned div over it with a border-radius and a thick black border, it will block the parts you want too be hidden.
I made a demo for another question about a similar problem in FF3.6: http://jsfiddle.net/vfp3v/15/
border-radius; overflow: hidden, and text is not clipped
Just as a heads up, this fix only worked for me if I applied the mask on a container with border-radius, but no border. Ultimately I ended up with something like this:
<div style="border-radius: 15px; border: 1px solid red;">
<div style="border-radius: 15px; overflow: hidden; -webkit-mask-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAA5JREFUeNpiYGBgAAgwAAAEAAGbA+oJAAAAAElFTkSuQmCC);">
<span style="position: relative; left; -20px;">Some stuff that overflows.</span>
</div>
</div>
With a border on the inner div, the clipping wasn't perfect.
Totally weird.
I found another possible solution to this bug, using CSS3 clip-path, but it only works in recent versions of webkit (it seems to work in Chrome 24, but not Safari 6.0.2). The following will clip a circle around the element:
-webkit-clip-path: circle(50%, 50%, 100%);
Hopefully this will be implemented by more browsers soon! It seems like this feature could have a lot of cool applications. Here's a relevant blog post: http://blog.romanliutikov.com/coding/css-clip-path-landed-in-webkit/.

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