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.

+ add another resource

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.

+ add another resource

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

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                .post
  a.fun-hover(href="#") Check out React For Beginners

.post
  a.fun-hover(href="#") Are you a Sublime Text Power User?

br

.post
  a.fun-hover(href="#") I love to learn!

.post
  a.fun-hover(href="#") I <br>sure<br>do<br>love<br>Flexbox! 
              
            
!

CSS

              
                yellow = #FEE603
black = #1E1F23
mint = #25B0A9

html
  font-size 10px
  font-family 'Bangers'

.post
  max-width 30rem
  margin 2rem
  float left
a
  font-size 4rem
  text-decoration none
  color black
  text-shadow 1px 1px 0 alpha(white,0.4)
  
// Get Going!
.fun-hover
  background-image linear-gradient(to right, mint 50%, yellow 50%)
  background-position 0
  // make the background twice as big
  background-size 200%
  transition all 0.4s
  &:hover
    background-position -100%

              
            
!

JS

              
                
              
            
!
999px

Console