Pen Settings



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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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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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.


Auto Save

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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.


                <div class="container">
  <span class="vertical-rl">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam purus tortor, tempor quis diam vel, gravida consectetur massa. Sed vel enim nisl. Aliquam cursus tristique turpis, vitae laoreet sem blandit sit amet. Aenean lobortis rutrum pellentesque. Morbi rhoncus erat orci, nec convallis nunc venenatis at.


                .vertical-rl {
  writing-mode: vertical-rl;
.vertical-lr {
  writing-mode: vertical-lr;