Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

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JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Packages

Add Packages

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.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

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Visit your global Editor Settings.

HTML

              
                <h1>
  Native outline style demo
</h1>

<main>
  <button>Button</button>
  <button>Button</button>
  <button>Button</button>
  <a href="#">Link</a>
  <a href="#">Link</a>
  <a href="#">Link</a>
</main>
              
            
!

CSS

              
                :focus
  outline-style: auto
  outline-offset: 5px
  outline-color: var(--highlight-color)
  outline-width: initial

/* --- */
:root
  --highlight-color: #214963

body
  margin: 0
  background: #ea6c6e
  min-height: 100vh
  display: flex
  gap: 40px
  align-items: center
  justify-content: center
  flex-direction: column
  font-family: sans-serif
  flex-wrap: wrap
  color: white

main
  display: flex
  gap: 20px
  align-items: center

h1
  margin: 0

button
  font: inherit
  background: white
  border: none
  padding: 0 12px
  line-height: 30px
  border-radius: 99px

  &:hover
    background: var(--highlight-color)
    color: white
    cursor: pointer

a
  color: inherit

  &:hover
    color: var(--highlight-color)
              
            
!

JS

              
                
              
            
!
999px

Console