Expanding Fullscreen Hamburger Menu With jQuery And CSS3

A jQuery & CSS based expanding navigation that will morph the hamburger menu trigger into a fullscreen overlay menu when needed. Heavily based on CSS3 transitions and transforms. jQuery is used only to toggle the CSS classes when you trigger / close the hamburger menu.

How to use it:

1. Create the hamburger menu trigger.

<div class="menu">
  <span class="menu-circle"></span>
  <a href="#" class="menu-link">
    <span class="menu-icon">
    <span class="menu-line menu-line-1"></span>
      <span class="menu-line menu-line-2"></span>
      <span class="menu-line menu-line-3"></span>
    </span>
  </a>
</div>

2. Style & animate the hamburger menu trigger.

.menu {
  position: absolute;
  top: 20px;
  left: 20px;
  height: 46px;
  width: 46px;
}

.menu-link {
  width: 100%;
  height: 100%;
  position: absolute;
  z-index: 1002;
}

.menu-icon {
  position: absolute;
  width: 20px;
  height: 14px;
  margin: auto;
  left: 0;
  top: 0;
  right: 0;
  bottom: 1px;
}

.menu-circle {
  background-color: #fff;
  width: 100%;
  height: 100%;
  position: absolute;
  border-radius: 50%;
  transform: scale(1);
  z-index: 1000;
  transition: all 0.2s ease-in-out;
}

.menu.open .menu-circle { transform: scale(60); }

.menu.open .menu-line-2 { opacity: 0; }

.menu.open .menu-line-1 { transform: translateY(7px) translateY(-50%) rotate(-45deg); }

.menu.open .menu-line-3 { transform: translateY(-7px) translateY(50%) rotate(45deg); }

.menu-line {
  background-color: #333;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  position: absolute;
  left: 0;
  transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

.menu-line-1 { top: 0; }

.menu-line-2 {
  top: 0;
  bottom: 0;
  margin: auto;
}

.menu-line-3 { bottom: 0; }

.menu:hover .menu-circle { transform: scale(1.4); }

3. Create the overlay menu as this:

<div class="menu-overlay">
  <a href="#">Home</a>
  <a href="#">About</a>
  <a href="#">Contact</a>
  <a href="#">Jobs</a>
</div>

4. Style the overlay menu in the CSS.

.menu-overlay {
  visibility: hidden;
  background-color: #fff;
  color: #333;
  height: 100%;
  width: 100%;
  position: fixed;
  text-align: center;
  transition: opacity 0.2s ease-in-out;
  z-index: 1001;
}

.menu-overlay a {
  color: #333;
  font-weight: 600;
  font-size: 32px;
  padding: 2%;
  margin: 25% 1% 0;
  display: inline-block;
}

.menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

5. Place the latest version of jQuery library (slim build) at the bottom of the html page.

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

6. The core jQuery script.

$(".menu-link").click(function(e) {
  e.preventDefault();
  $(".menu-overlay").toggleClass("open");
  $(".menu").toggleClass("open");
});

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This awesome jQuery plugin is developed by stevenpan78. For more Advanced Usages, please check the demo page or visit the official website.