Create Spinning, Fading Icons with CSS3 and jQuery

Last week I debuted a popular blog post titled Create Spinning, Fading Icons with CSS3 and MooTools. The post detailed how you could leverage CSS3′s transformations and opacity properties, as well as the magical MooTools JavaScript framework, to create spinning, fading, animated icons.  Due to popular request, I’ve duplicated the effect with another popular JavaScript toolkit:  jQuery.

The HTML

<div id="followIcons">
	<a href="http://feeds2.feedburner.com/Bludice" id="iconRSS">RSS Feed</a>
	<a href="http://twitter.com/davidwalshblog" id="iconTwitter">@davidwalshblog Twitter</a>
	<a href="http://github.com/darkwing" id="iconGitHub">@davidwalshblog Twitter</a>
	<a href="http://del.icio.us/dwizzlestar" id="iconDelicious">dwizzlestar de.licio.us</a>
	<a href="http://facebook.com/davidwalsh83" id="iconFacebook">David Walsh Facebook</a>
	<a href="http://linkedin.com/in/davidjameswalsh" id="iconLinkedIn">David Walsh LinkedIn</a>
	<a href="skype:davidwalsh83?chat" id="iconSkype">David Walsh Skype</a>
	<a href="mailto:david@davidwalsh.name" id="iconMail">David Walsh Email</a>
	<a href="http://mootools.net/forge/profile/davidwalsh" id="iconForge">David Walsh MooTools Forge</a>
</div>

The links are as standard as they come.  These will be turned into dynamic icons.

The CSS

The first part of the process is using standard CSS to move the text off screen and instead use the icons as background images for the link:

#followIcons a	{
display:inline-block;
width:48px;
height:48px;
text-indent:-3000px;
background-position:0 0;
background-repeat:no-repeat;
z-index:2000;
overflow:hidden;
position:absolute;
}

Once we’ve done that time-tested practice, it’s time to put a few initial CSS3 settings into place. As you probably know, at this point all CSS transform properties are browser-specific, so our CSS will get a bit lengthy:

#followIcons a	{
transition-duration: 0.8s;
transition-property: transform;
}

The transition duration will be 0.8 seconds and transition property will be a basic transform. You can change the transform duration to any duration you’d like. Too fast or too slow will ruin the effect (that’s what she said).

The jQuery JavaScript

The first part is randomly positioning each node/icon within the container. It’s important to know the container’s width and height, then subtract the icon width and height from that to know the true area you can fit the icon into. Nothing would be more lame than a piece of the icon hidden. The next step of the process is adding mouseenter and mouseleave events to make the images rotate and fade in during each respective event.

jQuery(document).ready(function() {

	// "Globals" - Will make things compress mo-betta
	var $random = function(x) { return Math.random() * x; };
	var availableWidth = 400, availableHeight = 40;
	
	// Get the proper CSS prefix
	if(jQuery.browser.webkit) {
		cssPrefix = "webkit";
	}
	else if(jQuery.browser.mozilla) {
		cssPrefix = "moz";
	}
	else if(jQuery.browser.opera) {
		cssPrefix = "o";
	}

	// Apply opacity
	var zIndex = 1000;
	
	// Randomize each link
	jQuery.each(jQuery("#followIcons a"),function(index) {
		var startDeg = $random(360);
		var element = jQuery(this);
		var resetPlace = function() {
			element.fadeTo(250,0.6).css("-" + cssPrefix + "-transform","rotate(" + startDeg + "deg)");
		};
		element.attr("style","top:" + $random(availableHeight) + "px; left:" + $random(availableWidth) + "px; z-index:" + zIndex).hover(function() {
			element.fadeTo(250,1).css("zIndex",++zIndex).css("-" + cssPrefix + "-transform","rotate(0deg)");
		},resetPlace);
		resetPlace();
	});
	
});

When the mouseenter event occurs, the rotation is animated to 0, no rotation. When the mouse leaves the element, the element animates to its initial random rotation. You’ll also note that I’ve used opacity to add to the subtle effect.

There you have it!

Read the full article at: Create Spinning, Fading Icons with CSS3 and jQuery

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