Develop Reference

Slider of images with undefined height

I'm trying to create a slider of images (previous/next) so the images slide to the left when I click "previous" and to the right when I click "next" with 0.5s of slowness, so it takes some animation. And when I reach the last image and click "next", I want images to "run backwards" to the first one, the same when I'm in the first one and click "previous", so it "run forward" until the last one.
I want the same behaviour this JSFiddle shows. (but I don't need the timer to move images automatically and don't need the "triggers" buttons, just "previous" and "next").
The problem here is that my images don't have fixed size. I define a width in percentage and can't define a height because I have responsive design, the image resizes as I resize the browser window.
The jQuery to previous/next actions is pretty easy, but I just can't find a way to add this animation when I remove/add the "active" class to my images (so they become visible or not).
I have already tried putting all images side by side and showing only the first one (setting container width equals to image width), so when I click "next" I just "move" the container to the left so it begins to display the next image, but it doesn't work because once I can't define the height of the images, they will appear underneath each other, not side by side.
JSFiddle
HTML
<div class="images">
<img class="active" src="1.jpg">
<img src="2.jpg">
<img src="3.jpg">
</div>
<div class="previous">previous</div>
<div class="next">next</div>
CSS
img {
width: 100px;
display: none;
float: left;
}
img.active {
display: block;
}
jQuery
$('.next').on('click', function() {
var active = $('img.active');
var next = active.next('img');
if (next.length) {
active.removeClass('active');
next.addClass('active');
} else {
active.removeClass('active');
$('.images img:first').addClass('active');
}
});

Well the problem is the height for sliding.
First you need to have an element which is the "picture frame" which hold all the other images. That's important.
For better imagination a picture:
Now you have several technics to show and hide images. One could be to set the opacity. When using transition: opacity .15s ease-in-out; The one Picture is fading out and the next on is fading in.
For the slideshow effect is given to the position of the visible image to its width to the left and the image previously purely new to his wide to the right and then to 0. Thus, moves the current picture on the left the frame out and the new comes out right in.
And here is the difficulty if the height is not the same. If the current image 300px high and the new 400px, so the image frame here would adjust his height immediately once the new image start to be visible.
The content below would start to jump with each slide.
Is that so desired???
If yes, I can make you an example how it works.

You can actually do this in Pure CSS!
You use an ID and a label (with a for attribute=for the targeted id)
That's basically it. All you have left is to style it! (Forked from Joshua Hibbert's Pen)
body {
background: #f7f4e2;
}
/* Slides */
.slider input {
display: none;
}
/* Buttons */
.slider label {
display: none;
cursor: pointer;
position: absolute;
top: 6em;
left: 50%;
transform: translateX(-50%);
color: #fff;
background: #000;
padding: 1.36em .5em;
opacity: .6;
font-size: 19px;
font-family: fantasy;
font-weight: bold;
transition: .25s;
}
.slider label:hover {
opacity: 1;
}
.previous {
margin-left: -188px;
}
.next {
margin-left: 188px;
}
#slide1:checked ~ .buttons .slide1 {
display: block;
}
#slide2:checked ~ .buttons .slide2 {
display: block;
}
#slide3:checked ~ .buttons .slide3 {
display: block;
}
#slide4:checked ~ .buttons .slide4 {
display: block;
}
/* Images */
.slider {
position: absolute;
top: 50%;
left: 50%;
width: 400px;
height: 300px;
margin-top: -150px;
margin-left: -200px;
white-space: nowrap;
padding: 0;
float: left;
transition: .25s;
overflow: hidden;
box-shadow: 0 0 0 3.12px #e8e8e8,
0 0 0 12.64px #eaebe4,
0 0 0 27.12px #000,
0 24px 3.824em 5.12px #000;
}
.slide {
width: 500em;
transition: .25s;
}
.slider img {
float: left;
width: 400px;
height: 300px;
}
#slide1:checked ~ .slide {
margin: 0;
}
#slide2:checked ~ .slide {
margin: 0 0 0 -400px;
}
#slide3:checked ~ .slide {
margin: 0 0 0 -800px;
}
#slide4:checked ~ .slide {
margin: 0 0 0 -1200px;
}
<div class="slider">
<input type="radio" name="slide" id="slide1" checked="true" />
<input type="radio" name="slide" id="slide2" />
<input type="radio" name="slide" id="slide3" />
<input type="radio" name="slide" id="slide4" />
<div class="buttons">
<!-- Slide 1 -->
<label for="slide4" class="slide1 previous"><</label>
<label for="slide2" class="slide1 next">></label>
<!-- Slide 2 -->
<label for="slide1" class="slide2 previous"><</label>
<label for="slide3" class="slide2 next">></label>
<!-- Slide 3 -->
<label for="slide2" class="slide3 previous"><</label>
<label for="slide4" class="slide3 next">></label>
<!-- Slide 4 -->
<label for="slide3" class="slide4 previous"><</label>
<label for="slide1" class="slide4 next">></label>
</div>
<div class="slide">
<img src="http://dribbble.s3.amazonaws.com/users/322/screenshots/872485/coldchase.jpg">
<img src="http://dribbble.s3.amazonaws.com/users/322/screenshots/980517/icehut_sm.jpg">
<img src="http://dribbble.s3.amazonaws.com/users/322/screenshots/943660/hq_sm.jpg">
<img src="http://dribbble.s3.amazonaws.com/users/322/screenshots/599584/home.jpg">
</div>
</div>
Although this method is the most compatible (except for old versions of IE) and depending on how you animate it this method can be more time consuming than a JS method, but can also be faster, it just depends on how you want the animations to go, or you could use a css library that does this for you.
Here are some css image sliders I recommend.
10 Amazing Pure CSS3 Image Sliders
http://bashooka.com/coding/pure-css3-image-sliders/
Pure CSS Image Slider Without Javascript #Codeconvey is a good solution for what you're looking for, but lots of CSS
http://codeconvey.com/pure-css-image-slider/
The downside to these along with what you're working on is that you can't touch to slide on a phone or tablet which is more common now a days with photo galleries.
I recommend checking out Fotorama it's amazing! :)

Perhaps not the ideal situation but at least it will give you an idea. you can use the animation function of jQuery and I also changed your code a bit. See demo here
Within your HTML I would say this:
<div id="images">
<div class="images-wrapper">
<img src="http://www.cutestpaw.com/wp-content/uploads/2016/02/In-the-spotlight.jpg">
<img src="http://www.cutestpaw.com/wp-content/uploads/2016/02/Bath-time-with-ducky.jpg">
<img src="http://www.cutestpaw.com/wp-content/uploads/2016/03/FB_IMG_1452981788903.jpg">
<img src="http://www.pictures-of-cats.org/images/Pixiebob-cat-list-of-cat-breeds-pictures-of-cats.jpg" />
</div>
</div>
<div class="previous">
previous
</div>
<div class="next">
next
</div>
and within your jQuery code you can animate the width:
$('.images-wrapper img:gt(0)').hide();
$('.next').click(function() {
$('.images-wrapper img:first-child').animate({width:'toggle'},350).next().fadeIn().end().appendTo('.images-wrapper');
});
$('.previous').click(function() {
$('.images-wrapper img:first-child').animate({width:'toggle'},350);
$('.images-wrapper img:last-child').prependTo('.images-wrapper').fadeOut();
$('.images-wrapper img:first-child').fadeIn();
});
With this implementation the whole process of changing and adding the active class to the image is removed and replaced by animation functions

Simplest solution (I think) is to force the items to be of the same size, by placing them in a div. You can even have the div show the image without the use of an img tag, by using the background-image CSS feature (see http://www.w3schools.com/css/css3_backgrounds.asp for more details).
The item CSS could look like:
.item {
background-size: contain;
background-position: center;
}
and in each item in the HTML:
<div class='item' style='background-image: url(img1.jpg)' />
<div class='item' style='background-image: url(img2.jpg)' />
<div class='item' style='background-image: url(img3.jpg)' />

I finally got there.
HERE is the fiddle with the solution I developed.
The main problem in the implementation of this image slider was that images, althought were all the same size, have dynamic width (defined in % on CSS) and dynamic height (not defined on CSS).
The solution was basically put an "fake" image (with opacity: 0) inside my container so the container get the actual size of images I will use in the slider; put a div to "hold" the real images with position: absolute and give it a width calculted by number of images * 100%; and for last, give each image in my slider a width of x%, based on number of images.
In the jQuery, I "move" the "images holder div" always by %, never by static values, once the width of everything can change if I resize the window.
If you start to slide the images to the left and right and then resize the window, you will see that it continues to work perfectly.

I have implemented using css3 animations. However this will require manipulating animation values in css every time a slide gets added or removed.
#keyframes slideAnim {
0% {
transform: translateX(0)
}
12.5% {
transform: translateX(0%);
}
25% {
transform: translateX(-25%);
}
37.5% {
transform: translateX(-25%)
}
50% {
transform: translateX(-50%)
}
62.5% {
transform: translateX(-50%)
}
75% {
transform: translateX(00%);
}
89.5% {
transform: translateX(00%)
}
100% {
transform: translateX(00%)
}
}
Here the animation values are set such that there is a pause between slide transitions. I have added a parent frame to show only one slide at a time.
Please refer this fiddle.

change :hover to click/tap function on mobile/touch devices not working

So, I'm trying to change the :hover function to a click function using Modernizr's no-touch/touch class for specific elements (captions) on a page. And in theory, this should work, but somehow it's only clickable once on a mobile/touch device, meaning that if I click/tap it again, it won't "un-hover". I can "un-hover" by tapping at another element on the page, but would very much like the caption to disappear when <figure> clicked/tapped again.
If I change the js so that it's the no-touch devices having to click, it works fine. What am I missing here?
Fiddle: https://fiddle.jshell.net/bh3aLkcL/3/
I'm afraid my js skills are quite poor to say the least (read: non-existing), and I've been using a snippet from another post: Change hover interaction to click for touch screen devices
The rest works, so it's just that one thing. Any help is greatly appreciated!
Javascript:
// For hovering becoming click via Modernizr
//$('body').hasClass('no-touch') ? event = 'mouseenter mouseleave' : event = 'click';
!$('body').hasClass('no-touch') ? event = 'mouseenter mouseleave' : event = 'click';
$('.design-section figure').on(event, function () {
$(this).toggleClass('open');
});
HTML:
<section id="work" class="content-section text-left" data-offset="100px">
<div class="design-section">
<div class="container">
<div class="col-lg-8 col-lg-offset-2">
<img src="http://cutepuppyclub.com/wp-content/uploads/2015/05/White-Cute-Puppy-.jpg" width="100%" class="img-responsive" alt="Playing the dilemma game">
<figure>
<figcaption>
<p>test text</p>
</figcaption>
</figure>
</div>
</div>
</div>
</section>
CSS:
figure {
padding: 0;
margin-top: 0;
position: relative;
display: block;
overflow: hidden;
}
figcaption {
position: absolute;
background: rgba(0,0,0,.3);
color: #fff;
}
figure.open figcaption {
-ms-filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
filter: alpha(opacity=100);
opacity: 1;
}
.design-section figcaption {
opacity: 0;
bottom: -30%;
left: 0;
-webkit-transition: all 0.6s ease;
-moz-transition: all 0.6s ease;
-o-transition: all 0.6s ease;
padding: 0;
width:100%;
display:block;
}
.design-section figure {
height:120px;
margin-top:-120px;
z-index:1;
}
.design-section img {
padding-top:0;
margin-top:14px;
z-index:0;
}
.design-section figcaption p {
margin:0;
padding: 1.5% 2.5%;
font-size:15px;
}
.design-section figure.open figcaption{
bottom: 0;
}
P.S. I'm using Bootstrap, but that shouldn't have anything to say in this matter.

You don't need to use Modernizr for checking touch events, you could do it this way:
var event = ('ontouchstart' in window) ? 'click' : 'mouseenter mouseleave';
$('.design-section figure').on(event, function () {
$(this).toggleClass('open');
});
Also, your using of Conditional (ternary) Operator is wrong, I fixed it. Read about right syntax.

you can specify multiple events as a parameter so just include the touchstart to add an action when a user clicks on mobile.
$('.design-section figure').on('mouseover mouseout touchstart', function () {
$(this).toggleClass('open');
});

Adjusting/Forcing Z-Indexes with JQuery

I am designing an alternate flat version of a 3D solar system piece for IE (because the transitions are a no go in IE for now) but I am having a lot of trouble with the Z-index in IE. The indexes work perfectly in the 3D webkit version.
I have tried manually adjusting the z-indexes for the IE css but the divs just won't move. I need another set of eyes.
This is the link to the JSBin for the entire piece. http://jsbin.com/sagix/1/edit
Each planet is activated when you click on the corresponding option in the navigation menu. The problem I am having is that once a planet is active there is a hover call. But the hover call for planets on the left (parenting, stress, spirituality) are not responding when I hover because of the z-indexes.
So my thought was to try it with JQuery. If it isn't happening in CSS can I force a div forward with JQuery on click?
If I can force it forward would this be the proper syntax (this is the only external custom JS in the piece. it is http://secure.cart32.com/WarrenKahn/scripts.min3.js)?
$(window).load(function(){var e=$("body"),t=$("#universe"),n=$("#solar-system"),r=function()
{e.removeClass("view-2D opening").addClass("view-3D").delay(500).queue(function()
{$(this).removeClass("hide-UI").addClass("set-speed");
$(this).dequeue()})},i=function(e){t.removeClass().addClass(e)};
$("#toggle-data").click(function(t){e.toggleClass("data-open data-close");
t.preventDefault()});
$("#toggle-controls").click(function(t){e.toggleClass("controls-open controls-close");
t.preventDefault()});
$("#data a").click(function(e){var t=$(this).attr("class");
n.removeClass().addClass(t);
$(this).parent().find("a").removeClass("active");
$(this).addClass("active");
$(this).parent().css('z-index', 1000);
e.preventDefault()});
$(".set-view").click(function(){e.toggleClass("view-3D view-2D")});
$(".set-zoom").click(function(){e.toggleClass("zoom-large zoom-close")});
$(".set-speed").click(function(){i("scale-stretched set-speed")});
$(".set-size").click(function(){i("scale-s set-size")});
$(".set-distance").click(function(){i("scale-d set-distance")});r()});
Then there is a close button on the hover div. Can I add the same zindex Jquery to the close button to return it to a lower value?
<script>
$(document).ready(function(){
$("#ca-close1").click(function(){
$("#descriptionls").fadeOut()
$('#mercury .infos').css('z-index', 1000);
});
});
</script>

Here is a working DEMO. Let me know if this fixes your problem. You could just copy the code from under the hood of my DEMO site?
I changed your following HTML:
<div id="data">
<a class="mercury" title="LIFE SKILLS" href="#mercuryspeed" onMouseOver="zOnEvent('mercury', 1);" onMouseOut="zOnEvent('mercury', 2);">LIFE SKILLS</a>
<a class="jupiter" title="CAREER" href="#jupiterspeed" onMouseOver="zOnEvent('jupiter', 1);" onMouseOut="zOnEvent('jupiter', 2);">CAREER</a>
<a class="venus" title="PARENTING" href="#venusspeed" onMouseOver="zOnEvent('venus', 1);" onMouseOut="zOnEvent('venus', 2);">PARENTING</a>
<a class="saturn" title="STRESS" href="#saturnspeed" onMouseOver="zOnEvent('saturn', 1);" onMouseOut="zOnEvent('saturn', 2);">STRESS</a>
<a class="uranus" title="SPIRITUALITY" href="#uranusspeed" onMouseOver="zOnEvent('uranus', 1);" onMouseOut="zOnEvent('uranus', 2);">SPIRITUALITY</a>
</div>
I added my JS function:
function zOnEvent(cl, cond) {
if (cond === 1) {
var element = document.getElementsByClassName(cl);
for (var i=0; i<element.length; i++) {
element[i].style.zIndex = '97';
}
} else if (cond === 2) {
var element = document.getElementsByClassName(cl);
for (var i=0; i<element.length; i++) {
element[i].style.zIndex = '10';
}
}
}
I changed the following sections of your CSS code:
.sun #sun .infos,
.mercury #mercury .infos,
.venus #venus .infos,
.earth #earth .infos,
.mars #mars .infos,
.jupiter #jupiter .infos,
.saturn #saturn .infos,
.uranus #uranus .infos,
.neptune #neptune .infos {
display: block;
opacity: 1;
-moz-transform: rotateX(0deg);
-webkit-transform: rotateX(0deg);
-o-transform: rotateX(0deg);
-ms-transform: rotateX(0deg);
transform: rotateX(0deg);
z-index:97;
}
.mercury #mercury.orbit,
.venus #venus.orbit,
.earth #earth.orbit,
.mars #mars.orbit,
.jupiter #jupiter.orbit,
.saturn #saturn.orbit,
.uranus #uranus.orbit,
.neptune #neptune.orbit {
border: 0px solid rgba(255, 255, 255, 0.8);
z-index:97;
}
#data {
position: fixed;
top: 515px;
bottom: 0;
width: 100%;
height:20px;
text-align: right;
}

weird behaviour in css transform:rotate

i trying to make this item draggable and rotatable.
however if i set transform:rotate(0deg);
i can drag everywhere in the parent container.
but if i set it to 90deg. there are some area became undraggable and it extended out of the parent container as well.
<div id="container">
<div id="myitem"><p>my rotate/drag</p></div>
CSS:
#container{
width:500px;
height:500px;
background:red;
}
#myitem{
width:115px;
height 50px;
background:black;
transform-origin:top left;
transform: rotate("90deg);
-ms-transform-origin:top left;
-ms-transform: rotate(90deg);
-webkit-transform: rotate(90deg);
-webkit-transform-origin:top left;
}
look for the example here
click here for sample of the problem
Have solucioned the problem!
If capture $(foo).offset().left when set css scale the value is not equals to real position if use transform-origin: top left;
To fix this replace
$(foo).offset().left by parseInt($(foo).css('left').replace('px',))
but need set
position after run: foo{ top: 0; left: 0; position: absolute; }
:)
The problem is who detect transform-origin and difference of positions when apply an scale(). Calculate by %?

I just running around your question, basically you want a draggable and rotatable with container...
I have done some changes to your fiddle and try to achieve this, http://jsfiddle.net/28WG3/19/
Some changes to the html too:-
<div id="container">
<div id="main"><div id="myitem"><p>my rotate/drag</p></div>
</div>
</div>
Hope this works for you...

background image shaky on div resize

I want to use HTML to create an "opening" effect of one on top of another one.
After some research i figured out a way (see JSFiddle).
I now have the problem that the background image moves a little bit when the circle is resizing.
Can anyone help me figure out how to get the background image to stand still.
The image in the circle needs to keep same zoom level when opening.
The circle needs to be centered and the bottom half needs to be out of the window.
Circle css is this:
.circle {
width: 0px;
height: 0px;
z-index: 10;
position: absolute;
border-radius: 50%;
overflow: hidden;
margin: 0 auto;
left: 50%;
-moz-transform: translate(-50%, 50%);
-webkit-transform: translate(-50%, 50%);
bottom: 0;
-moz-transition: all 1.5s;
-webkit-transition: all 1.5s;
}
JSFiddle: http://jsfiddle.net/GmvUQ/2/
Update,
Let me explain a little more. i notice that my question is not clear enough.
I have a few screenshot for the effect i want to create:
1st frame:
2nd frame
The entire effect is already working but when the transition is in progress (The circle with the image is getting bigger or smaller) the image inside the circle moves a little bit.
This is probably because of the calculations that need to be done by Javascript / CSS positioning.
I would like some help how to let this image stand entirely still during resize transition.
Thanks!

DEMO: http://jsfiddle.net/GmvUQ/5/
Updated HTML
<div>
<div class="buttons">
<button onclick="changeboleto(0)">Click here</button>
<button onclick="changeboleto(500)">Click here</button>
<button onclick="changeboleto(1000)">Click here</button>
</div>
<div class="circle girl">
</div>
<div class="circle lamborghini">
</div>
</div>
Note that I've removed the nested </div> elements within each .circle. Instead I've added an extra class for each, which sets the background-image (and some positioning for them, if necessary).
Updated CSS
.circle {
width: 250px;
height: 250px;
z-index: 10;
position: absolute;
border-radius: 50%;
overflow: hidden;
margin: 0 auto;
background-repeat: no-repeat;
background-size: cover;
background-origin: content-box;
background-position: center center;
}
.lamborghini {
background-image: url(http://www.hdwallpapers.in/walls/2013_wheelsandmore_lamborghini_aventador-wide.jpg);
}
.girl {
background-image: url(http://www.hdwallpapers.in/walls/colorful_background_girl-normal5.4.jpg);
top: 50%;
}
.buttons {
position: relative;
z-index: 5;
}
I've moved most of the CSS in to the .circle class as it is common to both image sets. Pay special attention to the values for the background-* attributes.
Updated JQuery
function changeboleto(pix) {
circleHeight = pix;
circleWidth = pix;
$('.circle').animate({
'width' : circleWidth,
'height': circleHeight
}, 1500, 'linear');
//css('width', circleWidth).css('height', circleHeight);
changeCircleBackgroundToWindow();
}
function changeCircleBackgroundToWindow() {
windowWidth = $(window).width();
windowHeight = $(window).height();
$(".circle > div").animate({
'width' : windowWidth,
'height': windowHeight
}, 1500, 'linear');
$(".circle > div").animate({
'width' : windowWidth,
'height': windowHeight
}, 1500, 'linear');
//$(".circle-background").css("width", windowWidth).css("height", windowHeight);
//$(".circle-background2").css("width", windowWidth).css("height", windowHeight);
}
Rather than mix JQuery and CSS transitions I've lumped all the animation together in the JQuery.
I've used the animate() function and specified the easing method. The default easing is swing but I've used linear as this progresses the animation at a constant pace.
Edit
The solution above includes CSS that allows the image to scale with the animation. However you are requesting that the image stays at the same "zoom level" throughout.
To achieve this simply remove a line from the CSS, namely this one:
.circle {
...
background-size: cover;
...
}

I know this is 5 years too late, but I found this thread via a search engine and thought I'd provide my own thoughts.
This effect can also be achieved with clip-path, which is a bit more forgiving than jquery's animate (which can still result in image shakiness if you're animating certain/enough properties).
clip-path has the additional benefit of not needing javascript at all if you're doing, say, hovers rather than button clicks. It also results in a simpler HTML file.
I've made an updated version of the original question's jsfiddle, http://jsfiddle.net/GmvUQ/13/ which demonstrates doing this with clip-path. It's still using jquery to handle the button clicks, but the "magic" all happens via CSS transitions, rather than javascript animations.
JQuery:
function changeboleto(pix) {
...
$('.circle-background').css('clip-path', 'circle(' + pix/2 + 'px at 50% 100%)');
}
CSS (including original CSS from original fiddle):
.circle-background {
position: absolute;
z-index: 10;
clip-path: circle(0% at 50% 100%);
background:url(http://www.hdwallpapers.in/walls/colorful_background_girl-normal5.4.jpg);
background-size: cover;
-webkit-transition: all 1.5s;
-moz-transition: all 1.5s;
bottom: 0%;
left: 50%;
-moz-transform: translateX(-50%);
-webkit-transform: translateX(-50%);
}
What this does is simply cause the CSS to transition on the clip-path property, animating the circle expansion. Because the image itself never moves, just the boundaries between which it displays, it never shakes.

Full screen demo
JSFiddle: http://jsfiddle.net/7bP7Z/4/ (Click around to see things grow)
Okay, so now that the question has more clarification I have revisited the drawing board and have come up with a better solution.
HTML
<div class="circle">
<div class="circle-overlay"></div>
<img src="http://www.hdwallpapers.in/walls/2013_wheelsandmore_lamborghini_aventador-wide.jpg" />
</div>
<div class="circle">
<div class="circle-overlay"></div>
<img src="http://www.hdwallpapers.in/walls/colorful_background_girl-normal5.4.jpg" />
</div>
Note the changes to the structure:
A containing element
An "overlay" element
An </img>
CSS
.circle {
position: relative;
overflow: hidden;
}
.circle-overlay {
position: absolute;
left: 50%;
margin-left: -150px;
bottom: -150px;
border-radius: 50%;
width: 300px;
height: 300px;
box-shadow: 0px 0px 0px 3000px white;
}
Nice and simple CSS!
The majority of the code is used to position our .circle-overlay class. This class provides a transparent circle (using border-radius) and utilises one of my favourite new CSS features - box-shadow - to apply a solid, white "outline" of an arbitrarily large value that covers the image below it. Have a play with the colour and size (adjust the 300px value) of the box-shadow to see how this works.
JQuery
$('.circle').click(function() {
var c = $(this).children('.circle-overlay');
var w = c.width() + 100;
c.animate({
'width' : w,
'height': w,
'bottom': (w*-0.5),
'margin-left': (w*-0.5)
}, 500, 'linear');
});
Once again, keeping things nice and simple!
The above JQuery performs a very simple task. It increases the size of the circle-overlay whilst maintaining its bottom, centre positioning on every click.
This should be a very smooth animation and the image should not "judder" or "shake" as the image is not being manipulated.