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HTML

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Adding Classes

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About the <head>

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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <h1>Animated kebab menu</h1>

<ul class="nav">
  <li><a href="http://www.g.com">Home</a></li>
  <li><a href="http://www.g.com">Portfolio</a></li>
  <li><a href="http://www.g.com">Contact</a></li>
  <div class="kebab">
    <figure></figure>
    <figure class="middle"></figure>
    <p class="cross">x</p>
    <figure></figure>
    <ul class="dropdown">
      <li><a href="http://www.g.com">Art</a></li>
      <li><a href="http://www.g.com">Coding</a></li>
      <li><a href="http://www.g.com">Design</a></li>
      <li><a href="http://www.g.com">Web Development</a></li>
    </ul>
  </div>
</ul>


<a class="follow" href="https://twitter.com/mildrenben" target="_blank"><i class="fa fa-twitter"></i>Follow Me</a>

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

<link href='https://fonts.googleapis.com/css?family=Roboto:400,500,300,700' rel='stylesheet' type='text/css'>

<link href='https://fonts.googleapis.com/css?family=Nunito:400,700,300' rel='stylesheet' type='text/css'>
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CSS 

              
                $cubic-out: cubic-bezier(.32,2.04,.85,.54);
$cubic-in: cubic-bezier(.72,1.2,.71,.72);
$nunito: 'Nunito', sans-serif;
$roboto: Roboto, sans-serif;

$cyan: #00bcd4;
$yellow: #ffeb3b;
$grey: #9e9e9e;

$shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.16), 0 2px 8px 0 rgba(0, 0, 0, 0.12);

// Kebab styling

.kebab {
  cursor: pointer;
  position: relative;
  display: inline-block;
  box-sizing: border-box;
  padding: 0 16px;
  top: 12px;
  figure {
    width: 6px;
    height: 6px;
    border-radius: 5px;
    background: $cyan;
    margin: 3px 0;
  }
}

.middle {
  transition: all 0.25s $cubic-in;
  transform: scale(1);
  position: relative;
  box-shadow: 0 0.1px 0.1px 0 rgba(0, 0, 0, 0.16), 0 0.1px 0.3px 0 rgba(0, 0, 0, 0.12);
  -webkit-filter: blur(.1px);
  filter: blur(.1px);
}

.middle.active {
  transform: scale(4.5);
  transition: all 0.25s $cubic-out;
  box-shadow: 0 0.1px 0.1px 0 rgba(0, 0, 0, 0.16), 0 0.1px 0.3px 0 rgba(0, 0, 0, 0.12);
}

.cross {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  margin-top: -1px;
  font-family: $nunito;
  color: white;
  transition: all 0.2s $cubic-in;
  font-size: 22px;
  user-select: none;
}

.cross.active {
  transform: translate(-50%, -50%) scale(1);
  transition: all 0.15s $cubic-out;
}

// Other styling

h1, a, li {
  font-family: $roboto;
}

h1 {
  font-size: 26px;
  background: $cyan;
  color: white;
  padding: 40px 0 40px 20%;
  margin-bottom: 50px;
}

a, li {
  color: darken($grey, 20%);
  text-decoration: none;
}

.nav {
  margin-left: 20%;
  > li {
    display: inline-block;
    padding: 1em 18px;
    cursor: pointer;
    &:hover {
      background: lighten($grey, 30%);
    }
  }
}

.dropdown {
    position: absolute;
    right: 0;
    top: 3em;
    transition: all 0.25s ease-out;
    transform: scale(0);
    transform-origin: 100% 0;
    box-shadow: $shadow;
    li {
      display: block;
      width: 100%;
      a {
        width: 100%;
        padding: 1em 18px;
        display: inline-block;
        white-space: pre;
        box-sizing: border-box;
        &:hover {
          background: lighten($grey, 30%);
        }
      }
    }
  &:hover {
    ul {
      transform: scale(1);
    }
  }
}

.dropdown.active {
  transform: scale(1);
  transition: all 0.25s cubic-bezier(.5,1.8,.9,.8);
}

//---------------------------------------------

.follow {
  overflow: hidden;
  width: 42px;
  height: 42px;
  border-radius: 50px;
  background: #03A9F4;
  display: block;
  margin: 300px auto 0;
  white-space: nowrap;
  padding: 13px;
  box-sizing: border-box;
  color: white;
  transition: all 0.2s ease;
  font-family: $roboto;
  text-decoration: none;
  box-shadow: 0 5px 6px 0 rgba(0,0,0,0.2);
  i {
    margin-right: 20px;
    transition: margin-right 0.2s ease;
  }
  &:hover {
    width: 134px;
    i {
      margin-right: 10px;
    }
  }
}

@media screen and (max-width: 800px) {
  .follow {
    margin: 400px auto 0;
  }
}
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JS 

              
                var kebab = document.querySelector('.kebab'),
    middle = document.querySelector('.middle'),
    cross = document.querySelector('.cross'),
    dropdown = document.querySelector('.dropdown');

kebab.addEventListener('click', function() {
  middle.classList.toggle('active');
  cross.classList.toggle('active');
  dropdown.classList.toggle('active');
})
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999px

Console