Mobile-first Off-screen Navigation With jQuery - 4PXMMenu

4PXMMenu is a super simple jQuery plugin that helps you create an off-canvas hamburger toggle menu on mobile devices, utilizing CSS3 transition, transforms and jQuery toggleClass() method.

How to use it:

1. Create the mobile off-canvas menu from an html unordered list as this:

<div class="mobmenu">
  <ul class="menu">
    <li><a href="#">Menü</a></li>
    <li><a href="#">Menü 2</a></li>
    <li><a href="#">Menü 3</a></li>
    <li><a href="#">Menü 4</a></li>
    <li><a href="#">Menü 5</a></li>
  </ul>
</div>

2. Create a header menu toggle bar:

<header id="ust">
  <div id="menuac">
    <span></span>
  </div>
</header>

3. Hide the mobile off-canvas menu on desktop.

.mobmenu { display: none; }

4. Wrap the main CSS styles in the CSS3 media queries as this:

@media only screen and (max-width: 768px) {

#ust {
  background: #333;
  position: fixed;
  height: 40px;
  top: 0;
  left: 0;
  right: 0;
}

#ust #menuac {
  position: absolute;
  top: 0;
  right: 0;
  cursor: pointer;
  padding: 19px 30px 20px 10px;
  border-left: 1px solid #666;
}

#ust #menuac span {
  cursor: pointer;
  height: 3px;
  width: 23px;
  background: #c9c9c9;
  position: absolute;
  display: block;
  content: '';
  transition: all 500ms ease-in-out;
}

#ust #menuac span:before {
  cursor: pointer;
  height: 3px;
  width: 23px;
  background: #c9c9c9;
  position: absolute;
  display: block;
  content: '';
  top: -7px;
  transition: all 500ms ease-in-out;
}

#ust #menuac span:after {
  cursor: pointer;
  height: 3px;
  width: 23px;
  background: #c9c9c9;
  position: absolute;
  display: block;
  content: '';
  bottom: -7px;
  transition: all 500ms ease-in-out;
}

#ust #menuac.acik span { background-color: transparent; }

#ust #menuac.acik span:before {
  top: 0px;
  transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  bottom: 0;
}

#ust #menuac.acik span:after {
  top: 0;
  transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
}

.mobmenu {
  position: fixed;
  left: -300px;
  -webkit-transition: all 0.5s ease;
  -moz-transition: all 0.5s ease;
  transition: all 0.5s ease;
  width: 300px;
  height: 100%;
  background: #fff;
  z-index: 9;
  display: block;
}

.mobmenu.mobmenu-acik {
  left: 0;
  -webkit-box-shadow: 10px 0px 26px -16px rgba(0,0,0,0.75);
  -moz-box-shadow: 10px 0px 26px -16px rgba(0,0,0,0.75);
  box-shadow: 10px 0px 26px -16px rgba(0,0,0,0.75);
}

.mobmenu ul.menu {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mobmenu ul.menu li a {
  padding: 10px;
  display: block;
  list-style: none;
  color: #999;
  border-bottom: 1px solid #ddd;
}

}

5. Put the latest version of jQuery library at the end of the html document.

<script src="//code.jquery.com/jquery-3.1.1.slim.min.js"></script>

6. The main JavaScript (jQuery script) to toggle CSS classes when the menu is active.

$mobilmenu = $('.mobmenu');
$menuac = $('#menuac');

$menuac.click(function() {
  $(this).toggleClass('acik');
  $('#ust').toggleClass('sagagel');
  $mobilmenu.toggleClass('mobmenu-acik');
});

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