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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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About the <head>

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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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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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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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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML 

              
                <svg class="book-shelf" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid" viewBox="0 0 84 94" height="94" width="84">
  <path fill="none" d="M37.612 92.805L4.487 73.71c-2.75-1.587-4.45-4.52-4.45-7.687L.008 27.877c-.003-3.154 1.676-6.063 4.405-7.634L37.558 1.167c2.73-1.57 6.096-1.566 8.835.013l33.124 19.096c2.75 1.586 4.45 4.518 4.45 7.686l.028 38.146c.002 3.154-1.677 6.063-4.406 7.634L46.445 92.818c-2.73 1.57-6.096 1.566-8.834-.013z"/>
  <g class="book-shelf__book book-shelf__book--one" fill-rule="evenodd">
    <path fill="#5199fc" d="M31 29h4c1.105 0 2 .895 2 2v29c0 1.105-.895 2-2 2h-4c-1.105 0-2-.895-2-2V31c0-1.105.895-2 2-2z"/>
    <path fill="#afd7fb" d="M34 36h-2c-.552 0-1-.448-1-1s.448-1 1-1h2c.552 0 1 .448 1 1s-.448 1-1 1zm-2 1h2c.552 0 1 .448 1 1s-.448 1-1 1h-2c-.552 0-1-.448-1-1s.448-1 1-1z"/>
  </g>
  <g class="book-shelf__book book-shelf__book--two" fill-rule="evenodd">
    <path fill="#ff9868" d="M39 34h6c1.105 0 2 .895 2 2v24c0 1.105-.895 2-2 2h-6c-1.105 0-2-.895-2-2V36c0-1.105.895-2 2-2z"/>
    <path fill="#d06061" d="M42 38c1.105 0 2 .895 2 2s-.895 2-2 2-2-.895-2-2 .895-2 2-2z"/>
  </g>
  <g class="book-shelf__book book-shelf__book--three" fill-rule="evenodd">
    <path fill="#ff5068" d="M49 32h2c1.105 0 2 .86 2 1.92v25.906c0 1.06-.895 1.92-2 1.92h-2c-1.105 0-2-.86-2-1.92V33.92c0-1.06.895-1.92 2-1.92z"/>
    <path fill="#d93368" d="M50 35c.552 0 1 .448 1 1v2c0 .552-.448 1-1 1s-1-.448-1-1v-2c0-.552.448-1 1-1z"/>
  </g>
  <g fill-rule="evenodd">
    <path class="book-shelf__shelf" fill="#ae8280" d="M21 60h40c1.105 0 2 .895 2 2s-.895 2-2 2H21c-1.105 0-2-.895-2-2s.895-2 2-2z"/>
    <path fill="#855f6d" d="M51.5 67c-.828 0-1.5-.672-1.5-1.5V64h3v1.5c0 .828-.672 1.5-1.5 1.5zm-21 0c-.828 0-1.5-.672-1.5-1.5V64h3v1.5c0 .828-.672 1.5-1.5 1.5z"/>
  </g>
</svg>
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CSS 

              
                body {
  background-color: #f5f5f1;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

@keyframes book-bounce {
  0% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  80% { transform: translateY(0); }
  100% { transform: translateY(0); }
}

@keyframes shelf-lift {
  0% { transform: translateY(0) rotate(0); }
  20% { transform: translateY(-4px) rotate(10deg); }
  40% { transform: translateY(-4px) rotate(0); }
  40% { transform: translateY(-4px) rotate(-10deg); }
  80% { transform: translateY(0); }
  100% { transform: translateY(0); }
}

.book-shelf:hover {
  cursor: pointer;
  
  .book-shelf__book {
    animation: book-bounce 0.4s ease;
    animation-iteration-count: 1;
  }
  
  .book-shelf__book--two {
    animation-delay: 0.04s;
  }

  .book-shelf__book--three {
    animation-delay: 0.08s;
  }
  
  .book-shelf__shelf {
    animation: shelf-lift 0.4s ease;
    animation-iteration-count: 1;
    transform-origin: 50% 50%;
  }
}
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JS
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999px

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