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HTML 

              
                <div id="pattern" class="pattern">
    <div class="offcanvas-top">
  		<div class="o-content">
				<p>Here is more content. This could be related items, navigation or other content you feel is conducive to this type of treatment.</p>
				<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean quis nisi et dui placerat ornare. Maecenas molestie lacus lobortis libero lacinia sed scelerisque lectus congue. Mauris dignissim nisi a ante laoreet et ullamcorper ligula ullamcorper. In hac habitasse platea dictumst. In nisi odio, tempor in viverra vitae, mollis ac tortor. Sed a rhoncus leo. Maecenas ac dui elit, tristique dapibus nisl. Suspendisse feugiat porta ligula, auctor posuere lorem vulputate et.</p>
				</div>
		</div>
</div>
	<!--End Pattern HTML-->
<div class="container">	
		<!--Pattern Description-->
		<section class="pattern-description">
			<h1>Off-Canvas Top</h1>
			<p>More content or navigation can be displayed off-canvas above the core content. </p>
			<h2>Pros</h2>
			<ul>
				<li>Saves space for core content.</li>
				<li>Elegant</li>
			</ul>
			<h2>Cons</h2>
			<ul>
				<li><strong>JS Dependency</strong> - Not necessarily a con, but ensure that off-canvas content is still accessible for users with poor/no JS support</li>
				<li><strong>Animation Performance</strong> - Platforms, especially mobile platforms, vary greatly in how well they treat animations. Keep this in mind.</li>
			</ul>
			<h2>Resources</h2>
			<ul>
				<li><a href="http://www.lukew.com/ff/entry.asp?1517">Off Canvas Multi-Device Layout</a></li>
				<li><a href="http://www.lukew.com/ff/entry.asp?1569">Off Canvas Multi-Device Layouts</a></li>
				<li><a href="http://jasonweaver.name/lab/offcanvas/">Off-Canvas demo by Jason Weaver</a></li>
			</ul>
		</section>
		<!--End Pattern Description-->
		
		<!--Footer-->
		<footer role="contentinfo">   
			<div>
				<nav id="menu">
					<a href="https://bradfrost.github.com/this-is-responsive/patterns.html">&larr;More Responsive Patterns</a>
				</nav>
			</div>
		</footer>
		<!--End Footer-->
	</div>
!

CSS 

              
                .offcanvas-top {
  position: relative;
  overflow: hidden;
  height: 3.2em;
  -webkit-transition: height 0.5s ease-out; 
  -moz-transition: height 0.5s ease-out;  
  -o-transition: height 0.5s ease-out; 
  transition: height 0.5s ease-out;
}
.offcanvas-top.active {
  height: 13.6em;
}
.o-content {
  width: 100%;
  position: absolute;
  bottom: 0;
  padding: 1em 1em 2.5em;
  
}
.crumbs li a {
  display: block;
  padding: 1em;
  border-bottom: 1px solid #000;
}
.crumbs li:last-child a {
  border-bottom: 0;
}
#trigger {
  position: absolute;
  bottom: 0;
  right: 0;
  display: block;
  font-size: 1em; 
  padding: 0 1em 1em;
}
!

JS 

              
                (function(w){
      var $container = $('.offcanvas-top'),
				$cHeight = $('.o-content').outerHeight();
			$(document).ready(function() {
				buildCanvas();
			});
			
			function buildCanvas() {
				$('<a href="#" id="trigger">More +</a>').appendTo($container);

				$('#trigger').bind('click', function(e) {
					e.preventDefault();
					var $this = $(this);
					$container.toggleClass('active');
					if($container.hasClass('active')) {
						$container.height($cHeight);
						$this.text('Hide -');
					} else {
						$container.height(50);
						$this.text('More +');
					}
				});

			}
			
			$(window).resize(function() { //On Window resizeBy(
				$cHeight = $('.o-content').outerHeight();
        console.log($cHeight);
			});
			
			
		})(this);
!
999px

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