Animated Off-canvas Side Menu using jQuery and CSS3 Transitions

A mobile App style off-canvas navigation menu using CSS3 transitions and a little bit of JavaScript (jQuery).

How to use it:

1. Include the Font Awesome icon font for the navigation icons.

<link href="//netdna.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet" >

2. Create a vertical side menu from a nested nav list.

<nav id="menu" class="left">
  <ul>
    <li><a href="#" class="active"><i class="fa fa-home"></i>Home</a></li>
    <li><a href="#"><i class="fa fa-info-circle"></i>About</a></li>
    <li> <a href="#"><i class="fa fa-laptop"></i>Services <i class="fa fa-caret-down"></i></a>
      <ul>
        <li><a href="#">Service</a></li>
        <li><a href="#">Service</a></li>
        <li><a href="#">Service</a></li>
      </ul>
    </li>
    <li><a href="#"><i class="fa fa-phone"></i>Contact</a></li>
  </ul>
  <a href="#" id="showmenu"> <i class="fa fa-align-justify"></i> </a>
</nav>

3. The core CSS styles for the side menu.

#menu {
  position: fixed;
  background-color: #222;
  height: 100%;
  z-index: 10;
  width: 280px;
  color: #bbb;
  top: 0;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  transition: all 0.3s ease;
  opacity: 1;
}

#menu ul {
  list-style: none;
  margin-top: 0;
  padding: 0
}

#menu ul li { border-bottom: 1px solid #2a2a2a; }

#menu>ul>li>a { border-left: 4px solid #222; }

#menu ul li a {
  color: inherit;
  font-size: 16px;
  display: block;
  padding: 8px 0 8px 7px;
  text-decoration: none;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  transition: all 0.3s ease;
  font-weight: 600;
}

#menu ul a i {
  margin-right: 10px;
  font-size: 18px;
  margin-top: 3px;
  width: 20px;
}

#menu ul a i[class*='fa-caret'] { float: right; }

#menu ul a:hover,
#menu ul a.active {
  background-color: #111;
  border-left-color: #FFCC33;
  color: #FFCC33;
}

#menu ul a:hover i:first-child { color: #FFCC33; }

4. The CSS to style the sub menus.

#menu ul li a.active+ul { display: block }

#menu ul li ul {
  margin-top: 0;
  display: none;
}

#menu ul li ul li { border-bottom: none; }

#menu ul li ul li a { padding-left: 30px; }

#menu ul li ul li a:hover { background-color: #1A1A1A; }

5. The CSS to turn the side menu into an off-canvas navigation that is toggleable via JavaScript.

.left { left: -280px; }

.show { left: 0; }

6. Style & position the toggle button whatever you like.

#showmenu {
  margin-left: 100%;
  position: absolute;
  top: 0;
  padding: 6px 10px 7px 10px;
  font-size: 1.3em;
  color: #FFCC33;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  transition: all 0.3s ease;
}

7. The JavaScript to active the off-canvas side menu. Make sure to place the following JS snippets after you have jQuery library included.

$("#showmenu").click(function(e){
  e.preventDefault();
  $("#menu").toggleClass("show");
});

$("#menu a").click(function(event){
  event.preventDefault();
  if($(this).next('ul').length){
    $(this).next().toggle('fast');
    $(this).children('i:last-child').toggleClass('fa-caret-down fa-caret-left');
  }
});

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This awesome jQuery plugin is developed by romanll. For more Advanced Usages, please check the demo page or visit the official website.