Flat Horizontal Toggle Menu with jQuery and CSS3

A modern flat designed horizontal navigation menu with an animated hamburger button, based on jQuery and CSS3 transitions & transforms.

How to use it:

1. Create a navigation menu with a toggle button following the markup structure like this:

<nav>
  <div class="toggleNav">
    <div class="toggleNavButton"></div>
  </div>
  <div id="subnav">
    <ul>
      <li> <a href="#">Menu Item 1</a> </li>
      <li> <a href="#">Menu Item 2</a> </li>
      <li> <a href="#">Menu Item 3</a> </li>
    </ul>
  </div>
</nav>

2. The global CSS styles.

* {
  -webkit-transition-timing-function: ease-out;
  transition-timing-function: ease-out;
  box-sizing: border-box;
  text-decoration: none;
  list-style: none;
  padding: 0;
  margin: 0;
}

body {
  color: #F2F2F2;
  background-color: #41558C;
}

3. The CSS/CSS3 rules to create smooth hamburger button transition effects.

.toggleNavButton {
  transition-duration: 0.5s;
  width: 40px;
  height: 2px;
  background-color: white;
  position: absolute;
  left: 50%;
  top: 25px;
  margin-left: -20px;
  border-radius: 2px;
}

.toggleNavButton:before,
.toggleNavButton:after {
  border-radius: 2px;
  transition-duration: 0.5s;
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  background-color: white;
  width: 40px;
  height: 2px;
}

.toggleNavButton:after { top: 20px; }

.toggleNavButton.active { width: 0; }

.toggleNavButton.active:after {
  top: 10px;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
}

.toggleNavButton.active:before {
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
}

.toggleNav {
  border-bottom: 5px solid #15e1af;
  background-color: #54EFC9;
  width: 100%;
  height: 80px;
  text-align: center;
  line-height: 80px;
  cursor: pointer;
  color: white;
  font-size: 30px;
}

.toggleNav:hover { border-bottom: 5px solid #13ca9d; }

4. The required CSS to styles the navigation menu.

nav {
  width: 100%;
  min-height: 50px;
}

#subnav {
  width: 100%;
  border-bottom: 0px solid #e60b3e;
  background-color: #F64870;
  transition-duration: 0.2s;
  overflow: hidden;
  height: 0px;
}

#subnav.active {
  border-bottom: 5px solid #e60b3e;
  height: 50px;
}

#subnav ul {
  width: 615px;
  margin: 0 auto;
}

#subnav ul li {
  transition-duration: 0.3s;
  display: inline-block;
  text-align: center;
  width: 150px;
  padding: 10px 0;
  height: 50px;
}

#subnav ul li a { color: white; }

#subnav ul li:hover { background-color: #e60b3e; }

5. Include the necessary jQuery library at the bottom of the web page.

<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

6. A little javascript to enable the toggle mnu.

$(".toggleNav").click(function () {
  $("#subnav").toggleClass("active");
  $(".toggleNavButton").toggleClass("active");
});

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