Develop Reference

How to condition styling child by hover on parent only?

In the code below when I hover on the gray button [the parent]
it perform some style on the child div bar
and that is what I need, I don't want child to be hovered itself
.foo {
width: 200px;
height: 50px;
background: gray;
margin: 200px;
position: relative;
}
.baz {
position: absolute;
width: 50px;
height: 300px;
top: -150px;
left: 80px;
z-index: -1;
border: 1px solid;
}
.bar {
height: 100%;
background: url(https://images6.alphacoders.com/411/411189.jpg) no-repeat center;
background-position: cover;
-webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transform-origin: left;
transform-origin: left;
-webkit-transition: -webkit-transform 0.25s ease;
transition: -webkit-transform 0.25s ease;
transition: transform 0.25s ease;
transition: transform 0.25s ease, -webkit-transform 0.25s ease;
}
.foo:hover .bar {
-webkit-transform: scaleX(1);
transform: scaleX(1);
-webkit-transform-origin: right;
transform-origin: right;
}
<div class="foo">
<div class="baz">
<div class="bar"></div>
</div>
</div>

I guess you want the end user hover on the horizontal area (div.foo) to have the vertical area (div.baz div.bar) change but don't want the area change if the div.baz itself being hover?
Would this fix your issue?
.foo {
width: 200px;
height: 50px;
background: gray;
margin: 200px;
position: relative;
}
.baz {
position: absolute;
width: 50px;
height: 300px;
top: -150px;
left: 80px;
z-index: -1;
border: 1px solid;
}
.bar {
height: 100%;
background: url(https://images6.alphacoders.com/411/411189.jpg) no-repeat center;
background-position: cover;
-webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transform-origin: left;
transform-origin: left;
-webkit-transition: -webkit-transform 0.25s ease;
transition: -webkit-transform 0.25s ease;
transition: transform 0.25s ease;
transition: transform 0.25s ease, -webkit-transform 0.25s ease;
}
.foo:hover .baz:not(:hover) .bar {
-webkit-transform: scaleX(1);
transform: scaleX(1);
-webkit-transform-origin: right;
transform-origin: right;
}
<div class="foo">
<div class="baz">
<div class="bar"></div>
</div>
</div>

This is probably not the answer you're looking for (like many, I prefer to solve CSS problems with pure CSS solutions as often as possible), but you did tag your question with javascript, so I think it's a legitimate approach to solve the issue you're facing with 3 lines of javascript:
const foo = document.getElementsByClassName('foo')[0];
foo.addEventListener('mouseover', (e) => e.target.classList.add('hovered'), false);
foo.addEventListener('mouseout', (e) => e.target.classList.remove('hovered'), false);
This works because the events mouseover and mouseout events are explicitly added to foo, rather than to its grandchild bar (and bar never visibly overlaps foo).
Working Example:
const foo = document.getElementsByClassName('foo')[0];
foo.addEventListener('mouseover', (e) => e.target.classList.add('hovered'), false);
foo.addEventListener('mouseout', (e) => e.target.classList.remove('hovered'), false);
.foo {
width: 200px;
height: 50px;
background: gray;
margin: 200px;
position: relative;
}
.baz {
position: absolute;
width: 50px;
height: 300px;
top: -150px;
left: 80px;
z-index: -1;
border: 1px solid;
}
.bar {
height: 100%;
background: url(https://images6.alphacoders.com/411/411189.jpg) no-repeat center;
background-position: cover;
transform: scaleX(0);
transform-origin: left;
transition: transform 0.25s ease;
}
.foo.hovered .bar {
transform: scaleX(1);
transform-origin: right;
}
<div class="foo">
<div class="baz">
<div class="bar"></div>
</div>
</div>

jQuery add/remove class or toggle class

Im just curious to know the best practice for either toggling a class or just adding and removing it during a mouseenter/mouseleave state using jquery. Both seem to work fine im just not to sure which is best to go with.
Thank you
$('#image1').mouseenter(function() {
$('#image1').toggleClass('transform');
$('#image1 .images-color-overlay').toggleClass('transparent');
$('#image1 .images-text').toggleClass('show-images-text');
});
$('#image1').mouseleave(function() {
$('#image1').toggleClass('transform show-images-text');
$('#image1 .images-color-overlay').toggleClass('transparent');
$('#image1 .images-text').toggleClass('show-images-text');
});
.images-color-overlay {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: rgba(0, 0, 0, 0.4);
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.images {
width: 33.333%;
float: left;
overflow: hidden;
position: relative;
}
#image1 {
background-image: url("http://placehold.it/1000x320");
background-size: cover;
background-repeat: no-repeat;
background-position: center;
width: 100%;
height: 100px;
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.images-text {
text-align: center;
width: 100%;
position: absolute;
bottom: -20px;
color: #fff;
font-size: 10px;
line-height: normal;
-webkit-transition: all 1s;
transition: all 1s;
}
.show-images-text {
-webkit-transition: all 1s;
transition: all 1s;
bottom: 20px;
}
.transform {
-webkit-transform: scale(1.25);
transform: scale(1.25);
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.transparent {
background-color: rgba(0, 0, 0, 0) !important;
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="images">
<div id="image1">
<div class="images-color-overlay">
<p class="images-text">hidden-text</p>
</div>
</div>
</div>

Well a lot of this style question get shot down here on SO, because it seems it comes down to preference. But HERE is a way to do it all without javascript, only CSS, which some might consider more efficient.
.images-color-overlay {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: rgba(0, 0, 0, 0.4);
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.images {
width: 33.333%;
float: left;
overflow: hidden;
position: relative;
}
#image1 {
background-image: url("http://placehold.it/1000x320");
background-size: cover;
background-repeat: no-repeat;
background-position: center;
width: 100%;
height: 100px;
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.images-text {
text-align: center;
width: 100%;
position: absolute;
bottom: -20px;
color: #fff;
font-size: 10px;
line-height: normal;
-webkit-transition: all 1s;
transition: all 1s;
}
#image1:hover {
-webkit-transform: scale(1.25);
transform: scale(1.25);
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
#image1:hover .images-text {
-webkit-transition: all 1s;
transition: all 1s;
bottom: 20px;
}
.images-color-overlay:hover {
background-color: rgba(0, 0, 0, 0) !important;
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="images">
<div id="image1">
<div class="images-color-overlay">
<p class="images-text">hidden-text</p>
</div>
</div>
</div>

Your code is technically fine, however you can shorten it to just use the hover() method, as the function you provide will be called for both mouseenter and mouseleave events.
You can also use the this reference in the function to save DOM accesses, and also cache the jQuery object created from $(this) in a variable for re-use. Try this:
$('#image1').hover(function() {
var $image = $(this).toggleClass('transform');
$image.find('.images-color-overlay').toggleClass('transparent');
$image.find('.images-text').toggleClass('show-images-text');
});
.images-color-overlay {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: rgba(0, 0, 0, 0.4);
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.images {
width: 33.333%;
float: left;
overflow: hidden;
position: relative;
}
#image1 {
background-image: url("http://placehold.it/1000x320");
background-size: cover;
background-repeat: no-repeat;
background-position: center;
width: 100%;
height: 100px;
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.images-text {
text-align: center;
width: 100%;
position: absolute;
bottom: -20px;
color: #fff;
font-size: 10px;
line-height: normal;
-webkit-transition: all 1s;
transition: all 1s;
}
.show-images-text {
-webkit-transition: all 1s;
transition: all 1s;
bottom: 20px;
}
.transform {
-webkit-transform: scale(1.25);
transform: scale(1.25);
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
.transparent {
background-color: rgba(0, 0, 0, 0) !important;
-webkit-transition: all 1s ease;
transition: all 1s ease;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="images">
<div id="image1">
<div class="images-color-overlay">
<p class="images-text">hidden-text</p>
</div>
</div>
</div>

The toggleClass is the bast practice in your case.
Internally it's also doing same thing if the class exist then remove it and if not then add it. See it yourself , goto this github link and search for toggleClass.
// Check each className given, space separated list
if (self.hasClass(className)) {
self.removeClass(className);
} else {
self.addClass(className);
}

css opacity ease in out affecting other elements too

My page has a text form in the middle. The aim is to use css opacity transitions to switch background images by fading. (I'll be switching background images quite often)
Currently got it working nicely by using two layers of background images. To display a new image at the bottom layer, we fade out the top layer (opacity 1 to 0). To display a new image at the top layer, we fade in the top layer (opacity 0 to 1).
The problem is that my text form fades along with the top layer - which I want it to stay visible. How do I make it unaffected by the fading?
Attempts to solve this:
Setting z-index of either #searchForm input or .formDiv to 999999, thinking that this will put the form right at the top of the hierachy so it would be unaffected by transitions below. However, didn't work.
Setting position of #searchForm input or .formDiv to absolute. From http://www.w3schools.com/css/css_positioning.asp,
"Absolutely positioned elements are removed from the normal flow. The document and other elements behave like the absolutely positioned element does not exist."
This stackoverflow post CSS3 Alternating table rows opacity affects text as well as background says that child elements are affected by opacity too. I tried placing the div containing the background images inside the formDiv class so that it wouldn't be a child. But this will get the form covered by the top image, even without opacity on.
function changeBackground(newUrl) {
//check which layer is currently activated
if ($('#background-image-top').hasClass('transparent')) {
//place new image over top layer
$('#background-image-top').css('background-image', 'url(' + newUrl + ')');
//fade in new image
$('#background-image-top').toggleClass('transparent');
} else {
//place new image over bottom layer
$('#background-image-bot').css('background-image', 'url(' + newUrl + ')');
//fade out old image
$('#background-image-top').toggleClass('transparent');
}
}
#background-image-top {
background-image: url("../images/default.jpg");
background-repeat: no-repeat;
background-position: center center;
background-size: cover;
-webkit-background-size:cover;
-moz-background-size:cover;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out; }
#background-image-bot {
background-repeat: no-repeat;
background-position: center center;
background-size: cover;
-webkit-background-size:cover;
-moz-background-size:cover;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;}
.transparent {
opacity: 0.25;}
.formDiv {
background-color: red;
max-width: 500px;
height: 50px;
margin-left: auto;
margin-right: auto;
margin-top: 35%;}
#searchForm input {
width: 300px;
height: 30px;
font-size: 18px;}

I have made a little fiddle where you might can get inspiration, i just use a class to toggle the opacity and them put under the form with position absolute, hope it helps :)
and then use a click function with jQuery to toggle the effect.
the css:
form {
position: relative;
z-index: 10;
}
#background1 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: lightblue;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-ms-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
#background2 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: lightgreen;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-ms-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
.hide {
opacity: 0;
}
http://jsfiddle.net/9jb68w2o/

+++ If you feel better to use css opacity transitions to switch background images by using only one div ie) #background1, you can use this code
$(document).ready(function() {
$('#toggle').click(function(e) {
e.preventDefault();
$('#background1').toggleClass('color1');
});
});
body {
background-color: #f8f8f8;
color: #555;
}.container {
position: relative;
margin: 30px auto;
padding: 20px;
width: 200px;
height: 150px;
background-color: #fff
}
form {
position: relative;
z-index: 10;
}
input[type=text] {
margin: 10px 0;
padding: 5px;
width: calc(100% - 10px);
font-size: 15px;
outline: none;
}
input[type=submit] {
width: 100%;
text-transform: uppercase;
font-size: 15px;
background-color: #333;
color: #fff;
border: none;
cursor: pointer;
}
#background1 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: lightblue;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-ms-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
#background1.color1 {
background-color: lightgreen;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div class="container">
<div id="background1"></div>
<form>
<h2>Awesome form!</h2>
<input type="text" placeholder="Some text here" />
<input id="toggle" type="submit" value="Change now!" />
</form>`enter code here`
</div>

Move div when hovering another div with jquery

When I hover a div at the bottom, which only is shown a little bit, (div has width:100%;), I want this div to move up with a mouseovereffect, and the same time push the logo, which is in the center of the screen, upwards. I want to use jQuery, because nothing else works. When the mouse is off the div, I want the div to fall back down to hiding. They are two div's inside the body.
Here is parts of the html and css: code
I hope someone knows how to make a javascript to make this hover function where hovering a div moves another div, then goes back to normal.

Does this help
using the jquery animate you can animate the movement of divs easily..
<div id="box1"></div>
<div id="box2"></div>
<style type="text/css">
#box1
{
width: 100px;
height: 100px;
background-color: red;
}
#box2
{
width: 100px;
height: 100px;
background-color: yellow;
margin-top: 10px;
}
</style>
<script type="text/javascript">
$("#box1").hover(function(){
//alert("hover");
$("#box2").animate({marginLeft: "200"});
});
$("#box1").mouseleave(function(){
$("#box2").animate({marginLeft: "0"});
});
</script>

There are few changes which need to be made in your code,
1) You have given class boks1 in jquery , but such class does not exist in your code.
2)you can combine both mouseover and mouseout in hover function itself.
Jquery
$(document).ready(function () {
$(".box1").hover(function () { // on hover
$(".box").css("margin-top", "-20px");
},function() {//on mouseout
$(".box").css("margin-top", "20px");
});
});

Something like this should work (if I understand your question).
I only changed the jQuery and one line of the CSS (the last line in .box was changed to transition: background 0.4s 0.5s, margin 0.4s;).
$(document).ready(function () {
$(".textarea").hover(
function () {
$(this).height($(this).height() + 200);
$(".box").css("margin-top", "-200px");
},
function () {
$(this).height($(this).height() - 200);
$(".box").css("margin-top", "");
}
);
});
#charset "UTF-8";
/* CSS Document */
html {
background: url(bilder/backnormal.jpg) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
body {
margin: 0;
padding: 0;
}
.textarea {
background: rgba(255,255,255,0.5);
width: 100%;
float: left;
position: relative;
-webkit-transition: all 0.3s linear;
-moz-transition: all 0.3s linear;
-ms-transition: all 0.3s linear;
-o-transition: all 0.3s linear;
transition: all 0.3s linear;
}
.box1, .box2 {
color: #666;
height: 57%;
margin-top: 0px;
margin-bottom: 0px;
margin-right: 0px;
text-align: left;
padding-left: 350px;
transition: background-color 0.5s ease-in-out;
float: left;
}
.box1:hover, .box2:hover {
background: rgba(255,255,255,0.2);
transition: background-color 0.5s ease-in-out;
}
/*________*/
.box {
width: 300px;
height: 400px;
position: relative;
background: rgba(255,255,255,0);
display: inline-block;
float: left;
margin-top: 10%;
margin-bottom: 10%;
margin-left: 35%;
margin-right: 35%;
cursor: default;
text-align: center;
-webkit-transition: background 0.4s 0.5s;
transition: background 0.4s 0.5s, margin 0.4s;
}
.box:hover {
background: rgba(255,255,255,0.2);
-webkit-transition-delay: 0s;
transition-delay: 0s;
}
.logo {
width: 90%;
padding-top: 20%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<body>
<div class="menu">
</div>
<div class="box">
<img src="bilder/logouten.png" class="logo" />
</div>
<div class="textarea">
<div class="box1">
<h1>hello</h1>
<p>textexttextextextextexttextextxtxtexetxtextextextetex</p>
</div>
<div class="box2">
<h1>hello again</h1>
<ul>
<li>textext</li>
<li>haethaethaethaefgae</li>
<li>wordswordswords</li>
</ul>
</div>
</div>
<footer>
</footer>
</body>
</html>

Here is my solution:
$(".textarea").hover(
function () {
$('.textarea, .box').stop().animate({top: '-200px'});
}, function (){
$('.textarea, .box').stop().animate({top: '0'});
});
see Fiddle
For your information: Your code did not work because of typo in your jQuery selectors. I also mentions that you are using float left a certain time that makes no sense because you overrule it with other styles.
I'm animating the top position because the margin will not do the right thing. When using margin the animation stops when there is no space.
I'm trigger the hover on the texarea becaus it covers the hole width. When using the .box itselfe then you will loose the focus during the hover effect. This will end up in a jumping effect.
I also us the stop function to clear the quehe otherwhise every hover event will be stored an triggerd (makes also an jumping effect)
So my snippet may give you an idea of how to achieve your needs.

Create CSS3 Circles with text inside

I am trying to add text inside a CSS3 circle. But the text is outside of the circles proportion. When I hover over the circle it changes color but I would also like for the text to dissapear as well.
Extras: Is there a way to create make the circle pulsate while mouse is over it? Will jquery or javascript be necessary?
Example : http://jsfiddle.net/jqEzZ/2/
<style>
.cn-nav > a{
position: absolute;
top: 0px;
height: 70px;
width: 70px;
}
a.cn-nav-prev{
left: 0px;
}
a.cn-nav-next{
right: 0px;
}
.cn-nav a span{
width: 46px;
height: 46px;
display: block;
text-indent: -9000px;
-moz-border-radius: 23px;
-webkit-border-radius: 23px;
border-radius: 23px;
cursor: pointer;
opacity: 0.9;
position: absolute;
top: 50%;
left: 50%;
background-size: 17px 25px;
margin: -23px 0 0 -23px;
-webkit-transition: all 0.4s ease;
-moz-transition: all 0.4s ease;
-o-transition: all 0.4s ease;
-ms-transition: all 0.4s ease;
transition: all 0.4s ease;
}
.cn-nav a.cn-nav-prev span{
background: #666 url(../images/prev.png) no-repeat center center;
}
.cn-nav a div{
width: 0px;
height: 0px;
position: absolute;
top: 50%;
left: 50%;
overflow: hidden;
background-size: 100% 100%;
background-position: center center;
background-repeat: no-repeat;
margin: 0px;
-moz-border-radius: 0px;
-webkit-border-radius: 0px;
border-radius: 0px;
-webkit-transition: all 0.2s ease-out;
-moz-transition: all 0.2s ease-out;
-o-transition: all 0.2s ease-out;
-ms-transition: all 0.2s ease-out;
transition: all 0.2s ease-out;
}
.cn-nav a:hover span{
width: 100px;
height: 100px;
-moz-border-radius: 50px;
-webkit-border-radius: 50px;
border-radius: 50px;
opacity: 0.6;
margin: -50px 0 0 -50px;
background-size: 22px 32px;
background-color:#a8872d;
}
.cn-nav a:hover div{
width: 90px;
height: 90px;
background-size: 120% 120%;
margin: -45px 0 0 -45px;
-moz-border-radius: 45px;
-webkit-border-radius: 45px;
border-radius: 45px;
}
</style>
HTML
<div class="cn-nav">
<a href="#" class="cn-nav-prev">
<span>Previous</span>
<div style="background-image:url(images/1.jpg);"></div>
</a>
</div>

In your span style set:
.cn-nav a span {
overflow: hidden;
….
}
and remove text-indent: -9000px;
To make the text disappear, set the color equal to the background color on hover:
.cn-nav a:hover span {
...
background-color:#a8872d;
color: #a8872d;
}
Demo
If you want the circle to pulsate, look at using an animation (MDN Docs) for your hover rather than a simple transition.

I can't see what kind of picture you are using as a background image but I have an idea on how to place the text inside of the circle and hide it on hover.
I think I would solve this using a pseudoelement since you can than place text inside of your link and center it as well.
On hover you could then just put opacity: 0 or empty the content (content: "";)
I did simplify the markup just to show you how I'd solve it with the pseudoelement.
http://dabblet.com/gist/6406590

It's possible to make it pulsate purely with CSS using CSS3 animations. Learn more here.
JSfiddle: http://jsfiddle.net/Q3gMS/1/
HTML:
<div class="cn-nav">
<a href="#" class="cn-nav-prev">
<p>Click ME!</p>
<span></span>
<div style="background-image:url(images/1.jpg);"></div>
</a>
</div>
CSS:
.cn-nav > a {
position: absolute;
top: 0px;
height: 70px;
width: 70px;
}
a.cn-nav-prev {
left: 0px;
}
a.cn-nav-next {
right: 0px;
}
.cn-nav a span {
width: 46px;
height: 46px;
display: block;
text-indent: -9000px;
border-radius: 23px;
cursor: pointer;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)";
filter: alpha(opacity=90);
opacity: 0.9;
position: absolute;
top: 50%;
left: 50%;
-webkit-background-size: 17px 25px;
-moz-background-size: 17px 25px;
background-size: 17px 25px;
margin: -23px 0 0 -23px;
-webkit-transition: all 0.4s ease;
-moz-transition: all 0.4s ease;
-o-transition: all 0.4s ease;
-ms-transition: all 0.4s ease;
transition: all 0.4s ease;
}
.cn-nav a p {
display: block;
height: 70px;
width: 70px;
line-height: 70px;
text-align: center;
margin: 0;
padding: 0;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
filter: alpha(opacity=100);
opacity: 1;
-webkit-transition: opacity 0.2s ease-out;
-moz-transition: opacity 0.2s ease-out;
-o-transition: opacity 0.2s ease-out;
-ms-transition: opacity 0.2s ease-out;
transition: opacity 0.2s ease-out;
}
.cn-nav a:hover p {
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
filter: alpha(opacity=0);
opacity: 0;
}
.cn-nav a:hover span {
-webkit-animation: pulsate 1s infinite;
-moz-animation: pulsate 1s infinite;
-ms-animation: pulsate 1s infinite;
-o-animation: pulsate 1s infinite;
animation: pulsate 1s infinite;
}
#keyframes "pulsate" {
0% {
background-color: #a8872d;
}
50% {
background-color: red;
}
100% {
background-color: #a8872d;
}
}
#-moz-keyframes pulsate {
0% {
background-color: #a8872d;
}
50% {
background-color: red;
}
100% {
background-color: #a8872d;
}
}
#-webkit-keyframes "pulsate" {
0% {
background-color: #a8872d;
}
50% {
background-color: red;
}
100% {
background-color: #a8872d;
}
}
#-ms-keyframes "pulsate" {
0% {
background-color: #a8872d;
}
50% {
background-color: red;
}
100% {
background-color: #a8872d;
}
}
#-o-keyframes "pulsate" {
0% {
background-color: #a8872d;
}
50% {
background-color: red;
}
100% {
background-color: #a8872d;
}
}
.cn-nav a.cn-nav-prev span {
background: #666 url(../images/prev.png) no-repeat center center;
}
.cn-nav a div {
width: 0px;
height: 0px;
position: absolute;
top: 50%;
left: 50%;
overflow: hidden;
-webkit-background-size: 100% 100%;
-moz-background-size: 100% 100%;
background-size: 100% 100%;
background-position: center center;
background-repeat: no-repeat;
margin: 0px;
border-radius: 0px;
-webkit-transition: all 0.2s ease-out;
-moz-transition: all 0.2s ease-out;
-o-transition: all 0.2s ease-out;
-ms-transition: all 0.2s ease-out;
transition: all 0.2s ease-out;
}
.cn-nav a:hover span {
width: 100px;
height: 100px;
border-radius: 50px;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=60)";
filter: alpha(opacity=60);
opacity: 0.6;
margin: -50px 0 0 -50px;
-webkit-background-size: 22px 32px;
-moz-background-size: 22px 32px;
background-size: 22px 32px;
background-color: #a8872d;
}
.cn-nav a:hover div {
width: 90px;
height: 90px;
-webkit-background-size: 120% 120%;
-moz-background-size: 120% 120%;
background-size: 120% 120%;
margin: -45px 0 0 -45px;
border-radius: 45px;
}

HTML
<a class="circle"></a>
CSS
.circle {
position: relative;
width: 100px;
height: 100px;
margin: 50px auto;
background: #bada55;
display: block;
border-radius: 50%;
-webkit-transition: all .2s ease-in-out;
transition: all .2s ease-in-out;
}
.circle:after {
content: "Hover Here";
position: absolute;
width: 100%;
text-align: center;
top: 40%;
}
.circle:hover {
-webkit-transform: scale(1.5);
transform: scale(1.5);
background: #82983b;
}
.circle:hover:after {
content: "";
}
DEMO
For now, this just scales on hover and changes color. What did you mean by pulsate -- kinda like this? Pulsate w/ Keyframes