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Catalin Rosu, a.k.a Red, is a professional web designer and developer who loves to be creative and enjoys CSS techniques. You can find articles and tutorials on front-end web development by visiting his blog at red-team-design.com. Also, you can connect with him on Twitter as @catalinred. Catalin is a DZone MVB and is not an employee of DZone and has posted 27 posts at DZone. You can read more from them at their website. View Full User Profile

CSS 3D folding list with social buttons

01.29.2013
| 2223 views |
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CSS 3D transforms are just awesome. I’ve seen before some cool and inspiring implementations in the wild and still I can’t believe I didn’t had the chance to write an article on this topic ’til now.

So, what’s the idea for this article? Let’s say you own a blog, I was thinking about having a nice looking 3D folding list that contains the main social buttons and when people reach at the end of an article, the initial folded list would smoothly unfold. This could be helpful if you want to draw users’ attention, something like: “Hey, did you like my article? Connect with me!”.

CSS 3D folding list with social buttons

View demo

The HTML

The markup is built using an unordered list which contains snippets and links for each social network. Also, the heading will be able to toggle the folding list.

Each li has an HTML hook class attribute for using color coding: blue for Twitter, orange for RSS and so forth. The fontawesome-* ones are responsible for rendering the social icons using Font Awesome.

<h2 class="connect">Connect with me</h2>
<ul class="folding folded">
	<li class="fb">
		<div class="content">
			[Facebook snippet]
			<a href="" class="fontawesome-facebook"></a>
		</div>
	</li>
	<li class="tw">
		<div class="content">
			[Twitter snippet]
			<a href="" class="fontawesome-twitter"></a> 
		</div>
	</li>
	<li class="gp">
		<div class="content">
			[Google+ snippet]
			<a href="" class="fontawesome-google-plus"></a>
		</div>
	</li>
	<li class="rss">
		<div class="content">
			[Simple RSS link]
			<a href="" class="fontawesome-rss"></a>
		</div>
	</li>
</ul>

The JavaScript

We’ll need some jQuery to manipulate the folding list and Modernizr for CSS 3D transforms detection.

As you can see below, the code will be executed only if csstransforms3d HTML class is added by Modernizr. The advantage here is that the rest of jQuery code will not be executed on browsers that do not support CSS 3D transforms.

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
<script>
(function(){			

	if ($('html').hasClass('csstransforms3d')) {

		var foldingList = $('.folding'),
			foldingListHeight = $('.folding').height();
			topElemOffset = foldingList.offset().top,
			// Function responsible for unfolding the list
			unfold = function(){
				setTimeout(function(){
					if (foldingList.hasClass('folded')){
						foldingList.removeClass('folded');
						return;
					}
				}, 500);
			}

		// Fold/Unfold the list
		$('.connect').on("click",function(){
			foldingList.toggleClass('folded');
		})
		// If needed, unfold the list right away
		if (topElemOffset <= $(window).height() - foldingListHeight)
			unfold();
		// Check whether to unfold the list when scrolling/resizing
		$(window).on("scroll resize", function(){
			var th = $(this);				
			if (th.scrollTop() + th.height() - foldingListHeight  >=  topElemOffset)
				unfold();				
		})
	}

})()
</script>

The CSS

If you’re willing to read more about CSS 3D Transforms, then you should try Intro to CSS 3D transforms, I can’t recommend it enough.

For simplicity’s sake, I will not include below all the vendor prefixed properties. You’ll find them all in the demo.

.folding {  			
	list-style-type: none;
	margin: 0;
	padding: 0;
}

.csstransforms3d .folding {
	perspective: 700px;	
}		

.folding li {
	height: 50px;
	color: #fff;
	padding-left: 30px;
	border-left: 30px solid rgba(0,0,0,.1);
}

.csstransforms3d .folding li {
	transition: ease .15s all;		
}		

.csstransforms3d .folding li:nth-child(even) {
	margin-top: -1px;
	transform-origin: 50% 100%;
	transform: rotateX(10deg);
}

.csstransforms3d .folding li:nth-child(odd) {
	transform-origin: 50% 0%;
	transform: rotateX(-10deg);
}		

.folding .fb {
	background-color: #3959a6;
}	

.folding .tw {
	background-color: #2fc6ff;
}	

.folding .gp {
	background-color:#d84d30;
}	

.folding .rss {
	background-color: #ff7e09;
}

.rss-link {
	color: #fff;
	font: .9em Arial, Helvetica;
}

.folding .content {
	position: relative;
	overflow: hidden;
	display: block;
	height: 20px;
	padding: 15px 0;
}

.csstransforms3d .folded li:nth-child(even) {
	margin-top: -75px;
	transform: rotateX(75deg);
	background-image: linear-gradient(rgba(255,255,255,0) 50%,
                          rgba(255,255,255,.5));
}

.csstransforms3d .folded li:nth-child(odd) {
	transform: rotateX(-75deg);
}

.csstransforms3d .folded .content {
	display: none;
}

/* Folding list heading */
.connect {
	padding: 12px 0 12px 30px;
	margin: 0 0 1px 0;
	color: #fff;
	border-left: 30px solid rgba(0,0,0,.2);
	cursor: pointer;
	font: bold .9em 'Lucida sans unicode',Arial, Helvetica;
	background-color: #555;
}		

.csstransforms3d .connect {	
	background-image: url(data:image/png;base64[shortened]);
	background-repeat: no-repeat;
	background-position: -24px center;
}

Font Awesome styles

Besides the above styles, we’ll need to include also the custom web font we’re using it here for the social icons. Including a font for these icons might seem overwhelming, but if you’re already using it in your project or website, this will come in handy.

For this example, I chose to include it using WeLoveFontIcons service made by Tim Pietrusky. Also, be aware because last time I checked, Firefox didn’t allow cross-domain fonts by default.

[class*="fontawesome-"]::before {
	font-family: 'FontAwesome', sans-serif;
	position: absolute;
	font-size: 55px;
	right: 30px;
	bottom: -15px;
	color: #fff;
}

[class*="fontawesome-"]:hover::before {
	bottom: -10px;
}

Optimized async loading of cross-domain scripts

When you need to deal with multiple scripts for different tools or social stuff, this is a winner. I use this snippet almost all the time and I highly recommend it.

(function(doc, script) {
    var js, 
        fjs = doc.getElementsByTagName(script)[0],
        add = function(url, id) {
            if (doc.getElementById(id)) {return;}
            js = doc.createElement(script);
            js.src = url;
            id && (js.id = id);
            fjs.parentNode.insertBefore(js, fjs);
        };
    // Google+ button
    add('https://apis.google.com/js/plusone.js');
    // Facebook SDK
    add('//connect.facebook.net/en_US/all.js', 'facebook-jssdk');
    // Twitter SDK
    add('//platform.twitter.com/widgets.js', 'twitter-wjs');
}(document, 'script

jQuery tip

You can bind multiple events at once when using jQuery’s .on(). In this case, we had to use the same code when scrolling or resize and this tip was very handy, considering DRY principle.

$(window).on("scroll resize", function(){
	// code here				
})

Check jQuery Fundamentals if you want to read more about Events and Event Delegation.

The future sounds good

Think about the power of Modernizr tool translated to CSS. This is exactly what the upcoming @supports is willing to achieve: native CSS feature detection. Sounds cool, huh?

Graceful degradation

The nice part about this CSS 3D folding list is that it degrades into a simple list when CSS 3D transforms are not available, thanks to Modernizr and its features detection.

CSS 3D folding list using graceful degradation

Mozilla Firefox

Unfortunately, at this time on Firefox, the sides are a bit jagged when using CSS 3D transforms. Still, I’m very confident this will improve soon.

View demo

That’s it!

I’m thinking to add this piece to the end of my articles too. Until then, I’m looking forward to read your thoughts on this article. Thanks for reading it!



Published at DZone with permission of Catalin Red, author and DZone MVB. (source)

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