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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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Adding Classes

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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CSS

About CSS Preprocessors

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.

Vendor Prefixing

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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

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JavaScript

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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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 

              
                <h1>Accessible Drop Caps</h1>

<div>
  <div>

    <h2>Incorrect</h2>
    <p>
      <span aria-labelledby="word--first" role="text">
        <span aria-hidden="true">
         <span class="dropcap">M</span>atthew
        </span>
        <span id="word--first" class="hidden">Matthew</span>
      </span>
      watched the storm, so beautiful yet terrific. Mist enveloped the ship three hours out from port. Waves flung themselves at the blue evening. Silver mist suffused the deck of the ship. I watched the storm, so beautiful yet terrific. Lorem ipsum dolor sit amet, consectetur adipiscing
      elit. Nulla pellentesque elit justo, nec rutrum leo pulvinar vel.
    </p>

  </div>
  <div>

    <h2>Not Incorrect</h2>
    <p>
      <span aria-hidden="true" class="drop">
        <span>M</span>atthew
      </span>
      <span class="visually-hidden">Matthew</span> watched the storm, so beautiful yet terrific. Mist enveloped the ship three hours out from port. Waves flung themselves at the blue evening. Silver mist suffused the deck of the ship. I watched the storm, so beautiful yet terrific.
      Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla pellentesque elit justo, nec rutrum leo pulvinar vel.
    </p>

  </div>

  <div>

    <h2>Standard CSS</h2>
    <p>
      Matthew watched the storm, so beautiful yet terrific. Mist enveloped the ship three hours out from port. Waves flung themselves at the blue evening. Silver mist suffused the deck of the ship. I watched the storm, so beautiful yet terrific. Lorem ipsum dolor sit amet, consectetur
      adipiscing elit. Nulla pellentesque elit justo, nec rutrum leo pulvinar vel.
    </p>

  </div>
</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Playfair+Display&display=swap');

body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  line-height: 1.4;
  color: #333;
  background-color: #eee;
}

body > div {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}

body > div div {
  flex: 0 1 15em;
  margin: 0 1em;
}


/* Styles from another demo */
.dropcap {
  font-family: "Playfair Display", serif;
  font-size: 5.5rem;
  float: left;
  line-height: 1;
  margin-right: 0.05em;
/*   outline: 1px solid #f00; */
}

.dropcap:before,
.dropcap:after {
  content: "";
  display: block;
}
.dropcap:before {
/*   margin-bottom: -0.175em; */
  margin-bottom: -0.21em;
}
.dropcap:after {
  margin-top: -0.05em;
}


/* The revised pattern */
/* Selector to enforce the pattern */
p > span[aria-hidden=true].drop span {
  font-family: "Playfair Display", serif;
  font-size: 5.5rem;
  float: left;
  line-height: 1;
  margin-right: 0.05em;
/*   outline: 1px solid #f00; */
}

p > span[aria-hidden=true].drop span::before,
p > span[aria-hidden=true].drop span::after {
  content: "";
  display: block;
}

p > span[aria-hidden=true].drop span::before {
/*   margin-bottom: -0.175em; */
  margin-bottom: -0.21em;
}

p > span[aria-hidden=true].drop span::after {
  margin-top: -0.05em;
}

.visually-hidden, .hidden {
  position: absolute;
  top: auto;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  width: 1px;
  height: 1px;
  white-space: nowrap;
}


/* You can use a class; I was just being a brat */
body > div div:last-of-type p:first-letter {
  font-family: "Playfair Display", serif;
  font-size: 5.5rem;
  float: left;
  line-height: .6; /* from 1 */
  margin-right: 0.05em;
}
!

JS
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