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HTML

About HTML Preprocessors

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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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

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

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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.

Add External Scripts/Pens

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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.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <header class="main-header">
  <h1 class="title">WordPress.org Typographic Modular Scale</h1>
</header>

<section class="break headings">
  <h1 class="title">Headings</h1>
  
  <h1>Heading Level 1</h1>
  <h2>Heading Level 2</h2>
  <h3>Heading Level 3</h3>
  <h4>Heading Level 4</h4>
  <h5>Heading Level 5</h5>
  <h6>Heading Level 6</h6>
</section>

<section class="break body">
  <h1 class="title">Body</h1>
  
  <p class="intro">(Intro) WordPress is web software you can use to create a beautiful website, blog, or app. We like to say that WordPress is both free and priceless at the same time.</p>
  
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
  <p>Some more base text for our reading pleasure to test the spacing between paragraphs.</p>
  
  <p class="aside">(Aside) WordPress requires a server running PHP and MySQL or MariaDB. We  recommend version 5.6 or greater of both.</p>
  
  <p class="note">(Note) We also recommend either Apache or Nginx as the most robust options for running WordPress, but neither is required.</p>
</section>

<section class="break examples">
  <h1 class="title">Examples (Headings + Body)</h1>
  
  <h1>Heading Level 1</h1>
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
  <h2>Heading Level 2</h2>
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
  <h3>Heading Level 3</h3>
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
  <h4>Heading Level 4</h4>
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
  <h5>Heading Level 5</h5>
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
  <h6>Heading Level 6</h6>
  <p>The core software is built by hundreds of community volunteers, and when you’re ready for more there are thousands of plugins and themes available to transform your site into almost anything you can imagine. Over 60 million people have chosen WordPress to power the place on the web they call “home” — we’d love you to join the family.</p>
</section>

<section class="break examples block-headings">
  <h1 class="title">Headings & subheadings</h1>
  
  <h1>Heading Level 1</h1>
  <p class="subheading">This is a subheading that provides further information.</p>
  
  <h2>Heading Level 2</h2>
  <p class="subheading">This is a subheading that provides further information with more text to double up the lines.</p>
</section>

<section class="break examples">
</section>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,700,400italic,700italic|Noto+Serif:400,700,400italic,700italic);

// Modular Scale Variables
$ms-base: 1rem 1.167rem;
$ms-ratio: 1.25;
$ms-breakpoint: 737px;

$type__base: 21px;
$type__base-mobile: 16px;
$type__lineheight: 1.5;

// Colors
$color__wp-blue: #0073aa;
$color__base-gray: #32373c;
$color__green: #C7E8CA;

* { box-sizing:border-box; }
.clearfix:before, .clearfix:after { content: ""; display: table; }
.clearfix:after { clear: both; }

html, body {
  font-size: $type__base-mobile;
}
@media(min-width:$ms-breakpoint) {
  html, body {
    font-size: $type__base;
  }
}

body {
  font-family: 'Source Sans Pro', sans-serif;
  line-height: $type__lineheight;
  font-weight: 400;
  color: $color__base-gray;
  
  padding: 0;
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Noto Serif", serif;
}

// For design purposes of this page only
section.break {
  margin: ms(10) ms(4);
  padding: 0;
  border-top: 2px solid #eee;
  
  &.block-headings {
    text-align:center;
    
    .title { text-align:left; }
    p { margin-bottom:4rem; }
  }
}
header.main-header { 
  margin: ms(10) ms(4);
}
h1.title {
  font-size: ms(-2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  color: $color__wp-blue;
}

h1, h2, h3, h4, h5, h6 {
  line-height: $type__lineheight;
  margin:2rem 0 1rem;
}

h1 {
  font-size: ms(12);
  font-weight: 300;
}

h2 {
  font-size: ms(8);
  font-weight: 300;
}

h3 {
  font-size: ms(4);
  font-weight: 700;
}

h4 {
  font-size: ms(2);
  font-weight: 600;
}

h5 {
  font-size: ms(0);
  text-transform: uppercase;
  letter-spacing: 0.01rem;
  font-weight: 600;
}

h6 {
  font-size: ms(-2);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
}

p { 
  margin:1em 0;
  max-width: ms(32);
  &.subheading {
    font-size: ms(2);
    font-weight:300;
    text-align:center;
    color:#82878C;
    margin: -1rem auto 2rem;
  }
  &.intro {
    font-size: ms(2);
  }
  &.aside {
    font-size: ms(-2);
  }
  &.note {
    font-size: ms(-4);
    letter-spacing: 0.01rem;
    max-width: ms(26);
  }
}

a { 
	color:$color__wp-blue; 
	text-decoration:none; 
	
	&:hover { text-decoration:underline; }
}

@media (min-width:630px) {
  aside p {
    font-size: ms(-2);
    letter-spacing: 0.005rem;
    max-width: ms(30);
  }
}
!

JS
!
999px

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