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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

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

     

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About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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About JavaScript Preprocessors

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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You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

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Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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HTML

            
              <nav>
  
  <a href="#" class="profile icon-user"></a>
  <a href="#" class="logo">logo</a>
  <a href="#" class="search icon-search"></a>
  
  <div class="main-nav">
    <ul>
      <li><a href="#">longform</a></li>
      <li><a href="#">reviews</a></li>
      <li><a href="#">videos</a></li>
      <li><a href="#">tech</a></li>
      <li><a href="#">science</a></li>
      <li><a href="#">entertainment</a></li>
      <li><a href="#">cars</a></li>
      <li><a href="#">design</a></li>
    </ul>
  </div>
  <div class="fade"></div>
  
</nav>
!

CSS

            
              //Import icons
@import url('//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css');
//Media query to switch modes
@mixin large {
  @media (min-width: 800px) {
    @content;
  }
}

//Responsive typography (optional)
html {
  font-size: 16px;
  @include large {
    font-size: 18px;
  }
}

body {
  font-family: -apple-system, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  width: 100%;
  color: white;
}

a {
  transition: opacity 150ms ease;
  text-decoration: none;
  color: inherit;
  &:hover {
    opacity: .75;
  }
}

nav {
  position: relative;
  display: flex;
  width: 100%;
  background: grey;
  flex-flow: row wrap;
  justify-content: space-between;
  @include large {
    flex-flow: row nowrap;
  }
}

.logo {
  margin: .5rem;
  text-transform: uppercase;
  color: lightGray;
  flex: 0 1 auto;
  order: 2;
  //Move to 1st position and add space on larger devices
  @include large {
    margin-right: 1rem;
    order: 1;
  }
}

.profile {
  font-size: 1.4rem;
  line-height: 1.5rem;
  padding: .5rem;
  //Non-essential, just OCD
  transform: translateY(.05rem);
  flex: 0 1 auto;
  order: 1;
  //Move to 3rd position on larger devices
  @include large {
    order: 3;
  }
}

.search {
  font-size: 1.2rem;
  line-height: 1.5rem;
  padding: .5rem;
  flex: 0 1 auto;
  order: 3;
  //Move to 4th position on larger devices
  @include large {
    order: 4;
  }
}

.main-nav {
  overflow-x: scroll;
  padding-right: 1rem;
  white-space: nowrap;
  flex: 1 1 100%;
  order: 4;
  -webkit-overflow-scrolling: touch;
  //Move main navigation to 2nd position or larger devices
  @include large {
    order: 2;
  }
  //Allow horizontal scrolling on smaller screens
  li {
    display: inline-block;
    padding: .5rem;
    text-transform: capitalize;
  }
  li:last-child {
    margin-right: 2rem;
  }
}

//Add visual cue indicating that there is more content
.fade {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 5rem;
  height: 2rem;
  background: linear-gradient( 90deg, rgba(grey, 0), grey);
  @include large {
    display: none;
  }
  pointer-events: none;
}
!

JS
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