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HTML

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About the <head>

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CSS

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CSS Base

About CSS Base

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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HTML 

              
                <header role="banner">
  <a class="brand" href="/" aria-label="Back to home">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/174183/logo-3.svg" alt="Acme logo" /> 
  </a>
  <nav>
    <ul class="scroll-track">
      <li>
        <a href="#">About</a>
      </li>
      <li>
        <a href="#">Work</a>
      </li>
      <li>
        <a href="#">Services</a>
      </li>
      <li>
        <a href="#">Blog</a>
      </li>
      <li>
        <a href="#">Team</a>
      </li>
      <li>
        <a href="#">Contact</a>
      </li>
  </nav>
</header>
!

CSS 

              
                /**
 * SCROLL TRACK
 * A wrapper that sits items side-by-side and provides some 
 * bouncy overflow. 
 */
.scroll-track {
  display: flex;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

/* We want items to retain their width within this container, so they break out */
.scroll-track > * {
  flex-shrink: 0;
}






/* Presentational styles */
:root {
  --background: #efefef;
}

body {
  background: var(--background);
  padding: 2rem 1rem;
  line-height: 1.4;
  font-family: sans-serif;
}

header[role="banner"] {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  max-width: 70rem;
  margin: 0 auto;
}

nav {
  display: contents;
}

nav ul {
  margin: 0 0 0 2rem;
  font-weight: 700;
  text-align: right;
  -ms-overflow-style: none;
}

nav ul::-webkit-scrollbar { 
  width: 0; 
  height: 0; 
}

nav a {
  color: #095256;
  display: inline-block;
}

nav li + li {
  margin-left: 1.5rem;
}

nav a:hover,
nav a:focus {
  text-decoration: none;
}

.brand {
  display: inline-block;
  width: 70px;
  flex-shrink: 0;
}

/* Trick stolen from Lea Verou's smart as heck work: http://lea.verou.me/2012/04/background-attachment-local/ */
nav ul {

  background-image: 
	
    /* Shadows */ 
    linear-gradient(to right, var(--background), var(--background)),
    linear-gradient(to right, var(--background), var(--background)),
  
    /* Shadow covers */ 
    linear-gradient(to right, rgba(0, 0, 0, 0.15), rgba(255, 255, 255, 0)),
    linear-gradient(to left, rgba(0, 0, 0, 0.15), rgba(255, 255, 255, 0));   

  background-position: left center, right center, left center, right center;
	background-repeat: no-repeat;
	background-color: var(--background);
	background-size: 20px 100%, 20px 100%, 10px 100%, 10px 100%;
	
	/* Opera doesn't support this in the shorthand */
	background-attachment: local, local, scroll, scroll;
}
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JS
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