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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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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 

              
                
<div class="content standard">
  <h1>A very strange odyssey indeed</h1>
  <p>Tell me, O muse, of that ingenious hero who travelled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home; but do what he might he could not save his men, for they perished through their own sheer folly in eating the cattle of the Sun-god Hyperion; so the god prevented them from ever reaching home. Tell me, too, about all these things, O daughter of Jove, from whatsoever source you may know them.</p>
  <figure class="medium right">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/sydney_harbor.jpg" />
    <figcaption><p>Odysseus sailed victoriously into Sydney Harbour, complete with the ‘u’ in the spelling</p></figcaption>
  </figure>
  <p>Tell me, O muse, of that ingenious hero who travelled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home; but do what he might he could not save his men, for they perished through their own sheer folly in eating the cattle of the Sun-god Hyperion; so the god prevented them from ever reaching home. Tell me, too, about all these things, O daughter of Jove, from whatsoever source you may know them.</p>
</div>
<div class="content vertical">
  <h1>A very strange odyssey indeed</h1>
  <p>Tell me, O muse, of that ingenious hero who travelled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home; but do what he might he could not save his men, for they perished through their own sheer folly in eating the cattle of the Sun-god Hyperion; so the god prevented them from ever reaching home. Tell me, too, about all these things, O daughter of Jove, from whatsoever source you may know them.</p>
  <figure class="medium right">
    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/sydney_harbor.jpg" />
    <figcaption><p>Odysseus sailed victoriously into Sydney Harbour, complete with the ‘u’ in the spelling</p></figcaption>
  </figure>
  <p>Tell me, O muse, of that ingenious hero who travelled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home; but do what he might he could not save his men, for they perished through their own sheer folly in eating the cattle of the Sun-god Hyperion; so the god prevented them from ever reaching home. Tell me, too, about all these things, O daughter of Jove, from whatsoever source you may know them.</p>
</div>
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CSS 

              
                /* Amstelvar Variable Font */
@font-face {
  font-family: 'Source Serif VF';
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/57225/SourceSerifVariable-Roman.ttf.woff2') format('woff2-variations');
  font-weight: 200 900;
  font-display: swap;
}

h1 {
  font-family: "Source Serif VF";
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin: 0 0 1rem 0;
}

* + h1 {
  margin-top: 2rem;
}

h2 {
  font-family: "Source Serif VF";
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.1;
  margin: 0 0 1rem 0;
}

* + h2 {
  margin-top: 2rem;
}

p {
  font-family: "Source Serif VF";
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.4;
  margin: 0 0 1rem 0;
}

img {
  height: auto;
  max-width: 100%;
  width: 100%;
}

figure {
  margin: 0 0 1rem 0;
  padding: 0;
}

figure.medium {
  width: 50%;
}

figure.right {
  float: right;
  margin-left: 1rem;
}

@media screen and (min-width: 35rem) {
  .vertical h1 {
    float: left;
    text-align: right;
    min-height: 50vh;
    max-height: 85vh;
    /* turn the writing on its side */
    writing-mode: vertical-rl;
    /* flip it around to the left */
    transform: rotate(180deg);
    /* we've rotated 180 degrees, so left is right :) */
    padding-left: 1rem;
  }
}
@media screen and (min-width: 45rem) {
  .vertical h1 {
    /* the negative margin-bottom removes the space blocking out the surrounding content */
    margin: 0 0 -100% 0;
    /* transform the point of origin for the rotation to position the heading outside the text block */
    transform-origin: center left;
    /* the negative margin-bottom removes the space blocking out the surrounding content */
    max-height: 55vh;
  }
}

.vertical figure {
  display: grid;
  grid-gap: 0.5rem;
}
@media screen and (min-width: 45rem) {
  .vertical figure {
    grid-template-columns: 1fr min-content;
    grid-template-rows: min-content;
    width: 35vw;
  }
  .vertical figcaption {
    /* turn the writing on its side */
    writing-mode: vertical-rl;
    /* compensate for content overflowing the grid area (seems to be a bug) */
    margin-right: -3.5rem;
  }
  .vertical figcaption p {
    background-color: #ffffff95;
    line-height: 1.1;
    margin: 0;
    padding: 0.25rem 0 0.25rem 0.25rem;
  }
}
@media screen and (min-width: 55rem) {
  .vertical figure {
   margin-right: -25%;
  }
}
/* layout */
.content {
  margin: 2rem auto;
  max-width: 96vw;
}
@media screen and (min-width: 25rem) {
  .content {
    max-width: 42rem;
  }
}

div + div {
  border-top: solid 1px #999;
  margin-top: 4rem;
  padding-top: 2rem;
}
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JS
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999px

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