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HTML

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About the <head>

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CSS

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CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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HTML 

              
                
  <div class="temp-wrap">

  <header>
  
  <img class="logo" src="http://qwerty-demos.co.uk/jay-be-logo.png" alt="">

  <nav class="mobile-nav-wrap" role="navigation">
   
    <div class="nav-container">
    
    <ul class="mobile-header-nav">
      <li><a href="#">Home</a></li>
      <li><a href="#">Products</a></li>
      <li><a href="#">Where to Buy</a></li>
       <li><a href="#">Guarantee</a></li>
       <li><a href="#">Our Story</a></li>
      <li><a href="#">Contact</a></li>
      <li><a href="#">Home</a></li>
      <li><a href="#">Products</a></li>
      <li><a href="#">Where to Buy</a></li>
       <li><a href="#">Guarantee</a></li>
       <li><a href="#">Our Story</a></li>
      <li><a href="#">Contact</a></li>
      <li><a href="#">Home</a></li>
      <li><a href="#">Products</a></li>
      <li><a href="#">Where to Buy</a></li>
       <li><a href="#">Guarantee</a></li>
       <li><a href="#">Our Story</a></li>
      <li><a href="#">Contact</a></li>
    </ul>

    </div>
    
  </nav>
    


  <a class="hamburger-menu" href="#">
    <span class="menu-item"></span>
    <span class="menu-item"></span>
    <span class="menu-item"></span>
  </a>
  
</header>

<section>
  <p style="font-size:8rem;">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
</section>

  

</div>
!

CSS 

              
                * {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

html.noscroll {
  overflow: hidden;
}

.temp-wrap {  
  max-width: 80rem;
  margin: 0 auto;
}

body.noscroll {
  overflow: visible;
  height: 100%;
}

.mobile-menu-toggle {
  z-index: 7000;
}

.logo {
  position: absolute;
  width: 700px;
  height: auto;
  top: 0;
  left: 50%;
  -webkit-transform: translate(-50%, 0);
          transform: translate(-50%, 0);
  z-index: 100;
  pointer-events: none;
}

body {
  padding-top: 100px;
}

header {
  -webkit-box-shadow: 0 -0.2rem 0.6rem rgba(0, 0, 0, 0.4);
          box-shadow: 0 -0.2rem 0.6rem rgba(0, 0, 0, 0.4);
  height: 100px;
  position: fixed;
  width: 100%;
  top: 0;
  left:0;
  z-index: 10;
}

.mobile-nav-wrap {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 100px;
  background: gold;
  display: none;

  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  
  -webkit-box-shadow: 0 0.2rem 0.6rem rgba(0, 0, 0, 0.4);
          box-shadow: 0 0.2rem 0.6rem rgba(0, 0, 0, 0.4);
}

.nav-container {
  background: gold;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left:0;

}

.mobile-header-nav {
  list-style: none;

  margin: 30px 0 0 0;
  padding: 0;
  width: 100%;
  height: 100%;

}
.mobile-header-nav li {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  margin-left: 30px;
  margin-right: 30px;
}
.mobile-header-nav li a {
  color: black;
  display: block;
  font-size: 26px;
  padding: 35px 0 35px 25px;
  text-decoration: none;
  -webkit-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
}
.mobile-header-nav li a:hover {
  background-color: #2f2f2f;
  color: white;
}






.hamburger-menu {
  display: inline-block;
  
  padding: 35px 25px;
  -webkit-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
}
.hamburger-menu:hover {
  cursor: pointer;
}
.menu-item {
  background: #252525;
  display: block;
  height: 4px;
  margin: 0 0 10px;
  -webkit-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
  width: 35px;
}
.hamburger-menu.open .menu-item {
  margin-bottom:10px;
}
.hamburger-menu.open .menu-item:first-child {
          transform: rotate(45deg);
          transform-origin: 5px;
}
.hamburger-menu.open .menu-item:nth-child(2) {
  opacity: 0;
}
.hamburger-menu.open .menu-item:nth-child(3) {
          transform: rotate(-45deg);
          transform-origin: 3px;
  background: red;
}
!

JS 

              
                // open mobile menu
$('.hamburger-menu').click(function(e){
  e.preventDefault();
  $('.mobile-nav-wrap').slideToggle();
  $(this).toggleClass('open');
  $('html, body').toggleClass('noscroll');
});
!
999px

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