CSS3 Inheritance Tips and Tricks – inherit, initial & unset

It’s easy to overlook the cascading features of style-sheets. Most designers/developers are aware of the inherit keyword but there are a few new inheritance features in CSS3 you may not be aware of…  read more @ http://www.css-jquery-design.com/…

css3-inheritance-tips-and-tricks-inherit-initial-unset

property: inherit;

The inherit keyword means “use whatever value is assigned to my parent”. If no value was explicitly defined on the parent element, the browser works up the DOM tree until the property is found. Ultimately, it ends at the browser  read more @ http://www.css-jquery-design.com/…
read-more-button

Pure CSS3 Animated Polaroid Gallery

Normally, Polaroid Gallery is a CSS3 & jQuery Image Gallery plugin for Media Library. It is used to overlay images as Polaroid pictures on the current page or post.

It’s a sure thing that CSS3 features like transitions, animations and transforms can add extra spice to your designs. In this article you will see how you can build an awesome CSS3 animated  Polaroid pictures gallery with some of these cool features.  This is something I wished to do for a while and I finally made it.css3-animated-polaroid-gallery

The HTML

The HTML structure hasn’t changed at all, simple and minimal. Here’s an excerpt:

<div class="photo-album">
<h2>Dhiraj, Geetu & Atharv at Taj ↦ Agra
  <a class="large polaroid img1" href="#"> 
    <img alt="" src="https://lh3.googleusercontent.com/-73u0oSgSX0w/UQ6PZ0Z1wOI/AAAAAAAADPE/57bc9C0BEG0/s512/Agra-trip%252520112.JPG" /> 
    Camel wants to kiss Atharv. </a> 
  <a class="polaroid img2" href="#"> 
    <img alt="" src="https://lh4.googleusercontent.com/-cPFum21LNBA/UQ6PXyb2ISI/AAAAAAAADPM/kJLhIyvx_2k/s512/Agra-trip%252520147.JPG" /> 
    My dearest one.. Atharv with Geetu. — at Taj Mahal</a> 
  <a class="small polaroid img3" href="#"> 
    <img alt="" src="https://lh6.googleusercontent.com/-Bz8NR-oKxGw/UQ6PguAxrsI/AAAAAAAADNY/B7i8X02vnbg/s512/Agra-trip%252520153.JPG" /> 
    Ferntastic</a> 
  <a class="medium polaroid img4" href="#"> 
    <img alt="" src="https://lh4.googleusercontent.com/-gB3RNt_3aos/UQ6Pmx5egoI/AAAAAAAADKM/lensH9ojFd0/s512/Agra-trip%252520154.JPG" /> 
    My dearest one.. Atharv with Geetu. — at Taj Mahal</a> 
  <a class="polaroid img5" href="#"> 
    <img alt="" src="https://lh5.googleusercontent.com/-YbVIBYilZ-M/UQ6P0w2PC8I/AAAAAAAADNc/kKzFy9k51D8/s512/Agra-trip%252520170.JPG" /> 
    Atharv & Geetu with Dhiraj.. Taj in background</a> 
  <a class="polaroid img6" href="#"> 
    <img alt="" src="https://lh6.googleusercontent.com/-IedPhDIDTcg/UQ6P5NG_hSI/AAAAAAAADKw/frG26WPd_OY/s512/Agra-trip%252520175.JPG" /> 
    Atharv in a cute pose.. Taj mahal in background</a> 
  <a class="polaroid img7" href="#"> 
    <img alt="" src="https://lh6.googleusercontent.com/-fhOKmDe-6S4/UQ6QBnHRDhI/AAAAAAAADPw/StGk4el6PVI/s512/Agra-trip%252520192.JPG" /> 
    Atharv with his papa Dhiraj</a> 
  <a class="small polaroid img8" href="#"> 
    <img alt="" src="https://lh4.googleusercontent.com/-lUXHF4hGxak/UQ6QF_7iZnI/AAAAAAAADOs/-agtNNnnYbU/s512/Agra-trip%252520193.JPG" /> 
    awesome</a> 
  <a class="medium polaroid img9" href="#"> 
    <img alt="" src="https://lh3.googleusercontent.com/-a-kezOzwNR8/UQ6QNJpEa4I/AAAAAAAADNk/FAN4Z3LDy2Y/s512/Agra-trip%252520206.JPG" /> 
    Geetu with Dhiraj</a> 
  <a class="polaroid img10" href="#"> 
    <img alt="" src="https://lh6.googleusercontent.com/-J3Gcspy0HKg/UQ6QXk3ZV9I/AAAAAAAADQE/0PyQD_VvC8o/s512/Agra-trip%252520221.JPG" /> 
    Nice one..</a> 
  <a class="small polaroid img11" href="#"> 
    <img alt="" src="https://lh5.googleusercontent.com/-OLpIvUAwZ6E/UQ6QY9gnPwI/AAAAAAAADNo/00eTz4E3_GI/s512/Agra-trip%252520223.JPG" /> 
    Sulphurous</a> 
  <a class="small polaroid img12" href="#"> 
    <img alt="" src="https://lh6.googleusercontent.com/-V-NJ8w3N5hs/UQ6QYqtZVOI/AAAAAAAADOw/FcjS2sgQXxA/s512/Agra-trip%252520229.JPG" /> 
    Atharv with his papa..</a> <a class="small polaroid img13" href="#"> 
    <img alt="" src="https://lh4.googleusercontent.com/-W1T4Z6_xwlQ/UQ6QAdQwuzI/AAAAAAAADNg/vSiGaoo7_TU/s512/Agra-trip%252520188.JPG" /> 
    Atharv with his papa Dhiraj</a> 
  <a class="small polaroid img14" href="#"> 
    <img alt="" src="https://lh6.googleusercontent.com/-Bz8NR-oKxGw/UQ6PguAxrsI/AAAAAAAADNY/B7i8X02vnbg/s512/Agra-trip%252520153.JPG" /> 
    Nice one..</a> 
  <a class="polaroid img15" href="#"> 
    <img alt="" src="https://lh4.googleusercontent.com/-W1T4Z6_xwlQ/UQ6QAdQwuzI/AAAAAAAADNg/vSiGaoo7_TU/s512/Agra-trip%252520188.JPG" /> 
    Atharv with his papa Dhiraj</a> 
</div>

CSS

a.polaroid {
		display: block;
		text-decoration: none;
		color: #333;
		padding: 10px 10px 20px 10px;
		width: 150px;
		border: 1px solid #d7d7d7;
		background-color: white; background:rgba(255,255,255,.9);
		z-index: 2;
		font-size: 0.7em;
		-webkit-box-shadow: 2px 2px 4px rgba(0,0, 0, 0.3),inset 0 0 0.7em rgba(0,0, 0, 0.4);;
		-moz-box-shadow: 2px 2px 4px rgba(0,0, 0, 0.3),inset 0 0 0.7em rgba(0,0, 0, 0.4);;
		box-shadow: 2px 2px 4px rgba(0,0, 0, 0.3),inset 0 0 0.7em rgba(0,0, 0, 0.4);-webkit-filter: blur(1px); border-radius:5px;
		-webkit-transition: all 0.5s ease-in; text-align:center
	}
	a.polaroid:hover, a.polaroid:focus, a.polaroid:active {
		z-index: 999;
		border-color: #999;
		-webkit-box-shadow: 15px 15px 20px rgba(0,0, 0, 0.4),inset 0 0 0.7em rgba(0,0, 0, 0.4);
		-moz-box-shadow: 15px 15px 20px rgba(0,0, 0, 0.4),inset 0 0 0.7em rgba(0,0, 0, 0.4);
		box-shadow: 15px 15px 20px rgba(0,0, 0, 0.4),inset 0 0 0.7em rgba(0,0, 0, 0.4);
		-webkit-transform: rotate(0deg) scale(1.05);
		-moz-transform: rotate(0deg) scale(1.05);
		transform: rotate(0deg) scale(1.05);-webkit-filter: blur(0px);
	}
	.polaroid img {
		margin: 0 0 15px;
		width: 150px;
		height: 120px;
	}

	a img {
		border: none;
		display: block;
	}

	.photo-album {
		position: relative; width: 80%; margin: 0 auto; max-width: 70em; height: 450px; margin-top:2.5em; min-width: 800px; max-width: 900px;
	}
	.photo-album .polaroid {
		position: absolute;
	}
	.photo-album h2 {
		position: absolute; z-index: 5; top: 150px; text-align: center; width: 100%; line-height: 2; 
	}
	.photo-album h2 span {
		background-color: white; background:rgba(255,255,255,.8);
		font-family: 'Satisfy', cursive;
		padding: 0.4em 0.8em 0.3em 0.8em;
		-webkit-box-shadow: 2px 2px 4px rgba(0,0, 0, 0.3);
		-moz-box-shadow: 2px 2px 4px rgba(0,0, 0, 0.3);
		box-shadow: 2px 2px 4px rgba(0,0, 0, 0.3);
		border-radius: 5px; border:1px solid #CCC
	}
	.photo-album .small {
		width: 75px; padding: 6px 6px 12px 6px; font-size: 0.6em;
	}
	.photo-album .small img {
		width: 75px; height: 60px;
	}
	.photo-album .medium {
		width: 200px; padding: 13px 13px 26px 13px; font-size: 0.8em;
	}
	.photo-album .medium img {
		width: 200px; height: 165px;
	}
	.photo-album .large {
		width: 300px; padding: 20px 20px 30px 20px; font-size: 1em;
	}
	.photo-album .large img {
		width: 300px; height: 250px
	}
	.photo-album .img1 {
		bottom: 10px; right: 365px; 
		-webkit-transform: rotate(10deg);
		-moz-transform: rotate(10deg);
		transform: rotate(10deg);
	}
	.photo-album .img2 {
		top: 50px; right: 20px;
		-webkit-transform: rotate(-4deg);
		-moz-transform: rotate(-4deg);
		transform: rotate(-4deg);
	}
	.photo-album .img3 {
		left: 400px; top: 0;
		-webkit-transform: rotate(-5deg);
		-moz-transform: rotate(-5deg);
		transform: rotate(-5deg);
	}
	.photo-album .img4 {
		top: 10px; left: 495px;
		-webkit-transform: rotate(-20deg);
		-moz-transform: rotate(-20deg);
		transform: rotate(-20deg);
	}
	.photo-album .img5 {
		bottom: 0; right: 0;
		-webkit-transform: rotate(1deg);
		-moz-transform: rotate(1deg);
		transform: rotate(1deg);
	}
	.photo-album .img6 {
		bottom: 10px; right: 156px;
		-webkit-transform: rotate(6deg);
		-moz-transform: rotate(6deg);
		transform: rotate(6deg);
	}
	.photo-album .img7 {
		bottom:0; left:400px;
		-webkit-transform: rotate(-10deg);
		-moz-transform: rotate(-10deg);
		transform: rotate(-10deg);
	}
	.photo-album .img8 {
		bottom: -20px; left: 700px;
		-webkit-transform: rotate(-8deg);
		-moz-transform: rotate(-8deg);
		transform: rotate(-8deg);
	}
	.photo-album .img9 {
		bottom: 0; left: 0;
		-webkit-transform: rotate(-8deg);
		-moz-transform: rotate(-8deg);
		transform: rotate(-8deg);
	}
	.photo-album .img10 {
		top: 0; left: 20px;
		-webkit-transform: rotate(8deg);
		-moz-transform: rotate(8deg);
		transform: rotate(8deg);
	}
	.photo-album .img11 {
		top: 0; right: 0;
		-webkit-transform: rotate(-8deg);
		-moz-transform: rotate(-8deg);
		transform: rotate(-8deg);
	}
	.photo-album .img12 {
		top: 0; left: 680px;
		-webkit-transform: rotate(18deg);
		-moz-transform: rotate(18deg);
		transform: rotate(18deg);
	}
	.photo-album .img13 {
		bottom: -20px; right: 630px;
		-webkit-transform: rotate(4deg);
		-moz-transform: rotate(4deg);
		transform: rotate(4deg);
	}
	.photo-album .img14 {
		top: 90px; left: 430px;
		-webkit-transform: rotate(15deg);
		-moz-transform: rotate(15deg);
		transform: rotate(15deg);
	}
	.photo-album .img15 {
		left:176px; top:20px;
		-webkit-transform: rotate(-8deg);
		-moz-transform: rotate(-8deg);
		transform: rotate(-8deg);
	}	
	a:hover, a:focus {
		z-index: 5;
	}

view demo

Your turn

I hope you enjoyed this article and the techniques I used. Please share your comments and questions below!

Posted by: Dhiraj kumar

Random 3D Explosions, 3D clouds – Effects with CSS 3D and jQuery

Introduction

This tutorial will try to guide you through the steps to create a 3D-like, explosions in sky or billboard-based clouds. There are a few advanced topics, mainly how 3D transformations via CSS properties work. If you want to find more information, this is a nice place to begin.

If you’re in a hurry, just check the final result.

css-3d-explosive-clouds

The tutorial is divided into sections, each with a different step to understand and follow the process, with HTML, CSS and Javascript blocks. Each step is based on the previous one, and has a link to test the code. The code in the tutorial is a simplified version of the demos, but the main differences are documented on every section.

HTML

First, we need two div elements: viewport and world. All the rest of the elements will be dynamically created.

Viewport covers the whole screen and acts as the camera plane. Since in CSS 3D Transforms there is no camera per se, think of it as a static sheet of glass through which you see a world that changes orientation relative to you. We’ll position all our world objects (or scene) inside it, and that’s what will be transformed around.

World is a div that we are going to use to anchor all our 3D elements. Transforming (rotating, translating or scaling) world will transform all our elements. For brevity and from here on, I’m using non-prefixed CSS properties. Use the vendor prefix (-webkit, -moz, -o, -ms, etc.) where appropriate.

This is all the markup we’ll need:

<div id="viewport">
    <div id="world"></div>
</div>

CSS

These next are our two CSS definitions. It’s very important to center the div that contains our scene (world in our case) in the viewport, or the scene will be rendered with an offset! Remember that you are still rotating an element that is positioned inside the document, exactly like any other 2D element.

#viewport {
	-webkit-perspective: 1000; -moz-perspective: 1000; -o-perspective: 1000; 
	position: absolute; 
	left: 0; 
	top: 0; 
	right: 0; 
	bottom: 0; 
	overflow: hidden;
	background-image: linear-gradient(bottom, rgb(69,132,180) 28%, rgb(31,71,120) 64%);
	background-image: -o-linear-gradient(bottom, rgb(69,132,180) 28%, rgb(31,71,120) 64%);
	background-image: -moz-linear-gradient(bottom, rgb(69,132,180) 28%, rgb(31,71,120) 64%);
	background-image: -webkit-linear-gradient(bottom, rgb(69,132,180) 28%, rgb(31,71,120) 64%);
	background-image: -ms-linear-gradient(bottom, rgb(69,132,180) 28%, rgb(31,71,120) 64%);
	background-image: -webkit-gradient(
			linear,
			left bottom,
			left top,
			color-stop(0.28, rgb(69,132,180)),
			color-stop(0.64, rgb(31,71,120))
	);
}

#world {
	position: absolute; 
	left: 50%; 
	top: 50%; 
	margin-left: -256px; 
	margin-top: -256px; 
	height: 512px; 
	width: 512px; 
	-webkit-transform-style: preserve-3d; 
	-moz-transform-style: preserve-3d; 
	-o-transform-style: preserve-3d; 
	pointer-events: none;
}

CSS For Adding Clouds Base

Now we start adding real 3D content. We add some new div which are positioned in the space, relatively to world. It’s esentially adding several absolute-positioned div as children of world, but using translate in 3 dimensions instead of left and top. They are centered in the middle of world by default. The width and height don’t really matter, since these new elements are containers for the actual cloud layers. For commodity, it’s better to center them (by setting margin-left and margin-top to negative half of width and height).

.cloudBase {
		position: absolute; 
		left: 256px; 
		top: 256px; 
		width: 20px; 
		height: 20px; 
		margin-left: -10px; 
		margin-top: -10px
	}

CSS for Clouds Layer

Now things start getting interesting. We add several absolute-positioned .cloudLayer div elements to each .cloudBase. These will hold our cloud textures.

.cloudLayer {
		position: absolute; 
		left: 50%; 
		top: 50%; 
		width: 256px; 
		height: 256px; 
		margin-left: -128px; 
		margin-top: -128px; 
		-webkit-transition: opacity .5s ease-out; 
		-moz-transition: opacity .5s ease-out; 
		-o-transition: opacity .5s ease-out;
	}

jQuery (JavaScript)

We add generate() and createCloud() functions to populate world. Note that random_{var} are not real variables but placeholder names for the real code, which should return a random number between the specified range.

var layers = [],
	objects = [],
	textures = [],

	world = document.getElementById( 'world' ),
	viewport = document.getElementById( 'viewport' ),

	d = 0,
	p = 400,
	worldXAngle = 0,
	worldYAngle = 0,
	computedWeights = [];

	viewport.style.webkitPerspective = p;
	viewport.style.MozPerspective = p;
	viewport.style.oPerspective = p;
	textures = [
		{ name: 'white cloud', 	file: 'cloud.png'	, opacity: 1, weight: 0 },
		{ name: 'dark cloud', 	file: 'darkCloud.png'	, opacity: 1, weight: 0 },
		{ name: 'smoke cloud', 	file: 'smoke.png'	, opacity: 1, weight: 0 },
		{ name: 'explosion', 	file: 'explosion.png'	, opacity: 1, weight: 0 },
		{ name: 'explosion 2', 	file: 'explosion2.png'	, opacity: 1, weight: 0 },
		{ name: 'box', 		file: 'box.png'		, opacity: 1, weight: 0 }
	];

	function setTextureUsage( id, mode ) {
		var modes = [ 'None', 'Few', 'Normal', 'Lot' ];
		var weights = { 'None': 0, 'Few': .3, 'Normal': .7, 'Lot': 1 };
		for( var j = 0; j < modes.length; j++ ) {
			var el = document.getElementById( 'btn' + modes[ j ] + id );
			el.className = el.className.replace( ' active', '' );
			if( modes[ j ] == mode ) {
				el.className += ' active';
				textures[ id ].weight = weights[ mode ];
			}
		}
	}
	setTextureUsage( 0, 'Few' );
	setTextureUsage( 1, 'Few' );
	setTextureUsage( 2, 'Normal' );
	setTextureUsage( 3, 'Lot' );
	setTextureUsage( 4, 'Lot' );

	generate();

	function createCloud() {

		var div = document.createElement( 'div'  );
		div.className = 'cloudBase';
		var x = 256 - ( Math.random() * 512 );
		var y = 256 - ( Math.random() * 512 );
		var z = 256 - ( Math.random() * 512 );
		var t = 'translateX( ' + x + 'px ) translateY( ' + y + 'px ) translateZ( ' + z + 'px )';
		div.style.webkitTransform = t;
		div.style.MozTransform = t;
		div.style.oTransform = t;
		world.appendChild( div );

		for( var j = 0; j < 5 + Math.round( Math.random() * 10 ); j++ ) {
			var cloud = document.createElement( 'img' );
			cloud.style.opacity = 0;
			var r = Math.random();
			var src = 'troll.png';
			for( var k = 0; k < computedWeights.length; k++ ) { 
				if( r >= computedWeights[ k ].min && r <= computedWeights[ k ].max ) { 					
( function( img ) { img.addEventListener( 'load', function() {
 						img.style.opacity = .8;
					} ) } )( cloud );
 					src = computedWeights[ k ].src; 
}} 
cloud.setAttribute( 'src', src ); 
cloud.className = 'cloudLayer'; 		 			
var x = 256 - ( Math.random() * 512 ); 
var y = 256 - ( Math.random() * 512 ); 
var z = 100 - ( Math.random() * 200 ); 
var a = Math.random() * 360; 
var s = .25 + Math.random(); 
x *= .2; y *= .2; 
cloud.data = {x: x, y: y, z: z, a: a, s: s, speed: .1 * Math.random()}; 
var t = 'translateX( ' + x + 'px ) translateY( ' + y + 'px ) translateZ( ' + z + 'px ) rotateZ( ' + a + 'deg ) scale( ' + s + ' )'; 
cloud.style.webkitTransform = t; 
cloud.style.MozTransform = t; 			
cloud.style.oTransform = t; 			
div.appendChild( cloud ); 			
layers.push( cloud ); 		} 		 		
return div; 	 	
function generate() { 		
objects = []; 		
if ( world.hasChildNodes() ) { 			
while ( world.childNodes.length >= 1 ) {
				world.removeChild( world.firstChild );       
			} 
		}
		computedWeights = [];
		var total = 0;
		for( var j = 0; j < textures.length; j++ ) { 			
if( textures[ j ].weight > 0 ) {
				total += textures[ j ].weight;
			}
		}
		var accum = 0;
		for( var j = 0; j < textures.length; j++ ) { 			
if( textures[ j ].weight > 0 ) {
				var w = textures[ j ].weight / total;
				computedWeights.push( {
					src: textures[ j ].file,
					min: accum,
					max: accum + w
				} );
				accum += w;
			}
		}
		for( var j = 0; j < 5; j++ ) {
			objects.push( createCloud() );
		}
	}

Result

For the final effect, we fill cloudLayer div for an img with a cloud texture. The textures should be PNG with alpha channel to get the effect right.

css-3d-explosive-clouds

Conclusion

Of course, you can use any texture or set of textures you want: smoke puffs, plasma clouds, green leaves, flying toasters… Just change the background-image that a specific kind of cloud layer uses. Mixing different textures in different proportions gives interesting results.

Adding elements in random order is fine, but you can also create ordered structures, like trees, duck-shaped clouds or complex explosions. Try following a 3D curve and create solid trails of clouds. Create a multiplayer game to guess the shape of a 3D cloud. The possibilities are endless!

I hope it’s been an interesting tutorial and not too hard to follow.

view demo

I hope you like the result and don’t hesitate to share your thoughts about it. Thanks for reading!

Posted by: Dhiraj kumar

Creating CSS Starbursts Design with CSS3 Transform

Working with the new CSS3 rotation property I got that I could create image free starbursts. All I needed was a series of nested block-level elements each rotated by a slightly different amount. The rotation would distribute the box corners around the circumference of the star.

About these CSS3 Starbursts:

A good thing is if you create your starbursts with CSS3 you can do so much more than with images. You can experiment with different numbers of points/corners, rounded borders, resize, text-shadows and animations also.

To see the animations you will need to use latest browsers like IE 9+, Firefox 4.0+, Safari 4.1+ and Chrome 3.0+.

css-starburst-design

No CSS Hacks

There are no CSS hacks required for these CSS3 starbursts. CSS is designed to be backwards compatible so any browser that cannot understand CSS3 will simply ignore these new rules without any error.

iPhone, iPod Touch, & iPad Compatible

The Safari browser is one of the most advanced when it comes to CSS3 because it uses the powerful Webkit rendering engine. This means all these animated starbursts will work fine on the iPhone, iPod Touch and the iPad.

SEO Friendly

Because the text in each starburst is actually real text it will be crawled and indexed by Google like everything else. It also means that people who are vision impaired can more easily read and understand your web page if they are using a screen reader.

No Images Required

All of the shapes, colours and shadows in the starbursts above are created using CSS3 rules. No images are used at all.

No JavaScript Required

The animations in these demos are made possible with the CSS3 transition rules. No JavaScript is used to create any effects.

Resizable Text Compatible

All the dimensions of the starbursts are set in em measurements. This means that you can increase the text size in your browser and the starburst will grow in size along with all other text. This is great news for web accessibility.

view demo

The HTML

<div class="price-container">
  <div class="price">
    <span class="label">Buy</span>
    <span class="number">$99.95</span>
    <span class="label">Now</span>
  </div>
</div>

I have <div> that, you guessed it, contains the price starburst. I’ll use this for the background of the starburst. The <div> is the container for the text inside (the price info.) That’s it for the markup. From here, I’ll be styling pseudo classes to create the multiple points. Also, I mentioned earlier that there were a few less points in the CSS version of this starburst. This markup doesn’t really have anything unnecessary in it.

The CSS

Now on to the fun part. Let me overview what I’m going to do, then I’ll show you the styles needed to achieve it. I’m going to style .price-container.price, and the :before and:after pseudo elements for each. Essentially, I’ve got six elements to work with. I created this background image to apply to each of the elements and I will rotate 15 degrees each:

image used for starburst

The CSS is a little bit longer. I’ve used the rotation rules in the CSS, one is for Firefox (prefixed with -moz-), one is for webkit i.e. Safari and Chrome (prefixed with -webkit-), one is for Internet Explorer (prefixed with -ms-), one is for Opera (prefixed with -o-), and the other is the standard rotation rule as it will be used once this rotation property becomes standard:

.price-container,
.price-container:before,
.price-container:after,
.price-container .price,
.price-container .price:before,
.price-container .price:after {
	height: 8.5em;
	width: 8.5em;
	background: #760B1F url(price-bg.png) top left no-repeat;
	background-size: 8.5em;
}

.price-container:before,
.price-container:after,
.price-container .price:before,
.price-container .price:after {
	content: "";
	position: absolute;
}

.price-container {
	margin: 100px auto; /* Centering for demo */
	position: relative; /* Context */
	top: 2.5em;
	left: 2.5em;
	-webkit-transform: rotate(-45deg);
	  -moz-transform: rotate(-45deg);
	   -ms-transform: rotate(-45deg);
	    -o-transform: rotate(-45deg);
	       transform: rotate(-45deg);
}

.price-container:before {
	top: 0;
	left: 0;
	-webkit-transform: rotate(-30deg);
	  -moz-transform: rotate(-30deg);
	   -ms-transform: rotate(-30deg);
	    -o-transform: rotate(-30deg);
	       transform: rotate(-30deg);
}

.price-container:after {
	top: 0;
	left: 0;
	-webkit-transform: rotate(-15deg);
	  -moz-transform: rotate(-15deg);
	   -ms-transform: rotate(-15deg);
	    -o-transform: rotate(-15deg);
	       transform: rotate(-15deg);
}

.price-container .price {
	padding: .5em 0em;
	height: 7.5em; /* height minus padding */
	position: absolute;
	bottom: 0;
	right: 0;
	-webkit-transform: rotate(45deg);
	  -moz-transform: rotate(45deg);
	   -ms-transform: rotate(45deg);
	    -o-transform: rotate(45deg);
	       transform: rotate(45deg);
	z-index: 1; /* important so the text shows up */
}

.price-container .price:before {
	top: 0;
	left: 0;
	-webkit-transform: rotate(60deg);
	  -moz-transform: rotate(60deg);
	   -ms-transform: rotate(60deg);
	    -o-transform: rotate(60deg);
	       transform: rotate(60deg);
}

.price-container .price:after {
	top: 0;
	left: 0;
	-webkit-transform: rotate(75deg);
	  -moz-transform: rotate(75deg);
	   -ms-transform: rotate(75deg);
	    -o-transform: rotate(75deg);
	       transform: rotate(75deg);
}

A few things I’ll point out about the styles:

  • Notice the order of the rotation angles: This order is important because there is going to be text inside the inner-most element. Therefore, the last element (the one the text going in, in this case .price) has to be straight. Notice that .price-container is rotated -45 degrees and .price is rotated 45 degrees – back to 0.
  • The height and width: The height and width has to be set since we are dealing with background images here. I’ve set it in ems to adjust appropriately when the text size increases.
  • There’s a padding top and bottom on .price-container .price. That’s why the height is a little different than all the others.
  • Everything is positioned absolutely inside the first container. .price-container hasleft: 2.5em and top: 2.5em just to move the whole thing a little. When everything is rotated, the corners go of the page and out of the container a little.
  • z-index: There’s a z-index defined for .price-container .price. This is so the price information inside this div is visible.

Now all that’s left is styling the text.

.price-container .price span {
        position: relative;
	z-index: 100;
	display: block;
	text-align: center;
	color: #FE0;
	font: 1.8em/1.4em 'georgia',Sans-Serif;
	text-transform: uppercase;
}

.price-container .price span.number {
  font-weight: bold;
  font-size: 2.5em;
  line-height: .9em;
  color: #fff;
}

Some more CSS used in hover effect:

.price-container.one:hover {
	-webkit-transform: rotate(-20deg);
	-moz-transform: rotate(-20deg);
	-ms-transform: rotate(-20deg);
	-o-transform: rotate(-20deg);
	transform: rotate(-20deg);
}

Doing It Image-Free

Now, I have some extra stuff in here because the design called for this very subtle inner border. If you don’t like or need the inner border, just remove the bit about background image and background size and design will hold up fine.

Browser Support

This works as-is in IE 9+, Firefox 4.0+, Safari 4.1+ and Chrome 3.0+. IE 8 and below do not support background-size, and Chrome 1.0, Firefox 3.6 and Safari 3.0 will require some vendor prefixes. IE8 does support pseudo elements, however doesn’t support transform.

The fallback would be a colored square. Very likely not a huge problem.

auto-adjustable-dynamic-starburst-design-css3-html5

There You Have It

It’s a price star thing. Flexible enough to grow when you increase your font size. Made with some CSS. You can use this for highlighting prices, discounts etc.

That’s it!

I hope you enjoyed this article and if you have questions, comments, or suggestions, let me know! Thanks for reading.

Posted by: Dhiraj kumar

Image Sprites – How to merge multiple images, and how to split them

An Image Sprites is a single image which is merged with multiple images. The reason why Image Sprites are needed instead of inserting multiple images into a page is to SAVE network bandwidth as well as reduce the number of server requests. Since inserting many images into a page will take longer time to load the pages, merging images into a single will help reduce loading time. For these reasons, I would recommend to use “CSS Image Sprites” function instead of inserting multiple images. Unfortunately, most of designers/developers not support this function as default, but through this tutorial, you would be able to merge multiple images into a single image as well as manipulating CSS.

“Image Sprites” is strongly recommended for Web, because Web themes have many graphics as default. Therefore, reducing the number of images is necessary to let people as well as search engines visit your sites faster than before. Some times ago, I have already posted an example of a cartoon type animation with help of Image Sprites.

Let me give you an example for easier understandings. Here is lots of avatars I have to put into a page. Without Image Sprites, I have to insert 24 individual avatars into a page. It will generate 24 requests of your web server so that it will take a long time to load.

24 image files to load / 24 requests

Just 1 image file to load / 1 request

With using “Image Sprites”, Only one request and one loading time will be generated. Which one do you think better?

In addition, with the help of “Image Sprites”, you can make use of hover effect more easily. In this tutorial, I will describe how to use Image Sprites with hover effects (View Demo).

To get started (Preparation)

  1. You may need to prepare more than two same size images to be inserted into a page like the avatar image file above.
  2. For this tutorial, I will use these 6 images below as an example. All six buttons’ sizes are equal as 33×33.

3 left images will be used for normal links, and the rest of images will be used for hover effects.

This single image below will be used for “Image Sprites”.

Instruction

  1. Download .zip file or View Demo.
  2. Extract the compressed file onto your hard drive.
  3. Open “imagesprites.html” file using any TextEditor (Notepad/Dreamweaver).
  4. I will let you know some parts you need to replace so that you better modify some codes using text editor.
  5. This code is for this example so that your code will be different. You can refer to this code about how it works.
  6. Take a look at this part of the source code below:
.prev-button {
    width: 33px; height: 33px; border: 0px; background:url('/images/controllers.png') 0 0
}
a:hover .prev-button {
    width: 33px; height: 33px; border: 0px; background: url('/images/controllers.png') 0px -33px
}
.play-button  {
    width: 33px; height: 33px; border: 0px; background:url('/images/controllers.png') -33px 0
}
a:hover .play-button  {
    width: 33px; height: 33px; border: 0px; background: url('/images/controllers.png') -33px -33px
}
.next-button  {
    width: 33px; height: 33px; border: 0px; background:url('/images/controllers.png') -66px 0
}
a:hover .next-button  {
    width: 33px; height: 33px; border: 0px; background: url('/images/controllers.png') -66px -33px
}
image sprite
 As you can see, the first image’s position is “0 0” (.prev-button). The second image (.play-button) position is “-33px 0”. Because each width is set to 33px. Hence, the next image’s position should be “-66px 0”. On the other hand, for hover images, their Y position should be “-33px”, because each height is set to 33px.
  1. If you have set all, the next is to insert HTML codes for each image class like below:
<body style="background: transparent; margin: 0pt; ">
<div>
<a href="URL" target="_top"><img class="prev-button" src="/images/spacer.gif" /></a>
</div>

<div>
<a href="URL" target="_top"><img class="play-button" src="/images/spacer.gif" /></a>
</div>

<div>
<a href="URL" target="_top"><img class="next-button" src="/images/spacer.gif" /></a>
</div>
</body>
  1. If you don’t want an image to be linked, remove href= “URL” target= “_top” tag.
  2. Replace class names such as “prev-button”, “play-button”, and “next-button” to yours.
  3. Make sure the classes doesn’t have “.” at the very front.
  4. Modifying codes is done. You can apply this technique to other merged images.
  5. Make sure “spacer.gif” as well as your merged image file are also uploaded to the right place such as “/images/”.
  6. You are ready to check how “Image Sprites” works correctly. You will reduce the number of server requests as well as save network bandwidth with this CSS technique.

Posted by: Dhiraj kumar