Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's 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 it's URL and the proper URL extention.

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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.

+ 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

Save Automatically?

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

              
                <div class="container">
  <div class="scene">
    <div class="element">
      <div class="inner">内部元素,Bottom=0, right=0</div>
    </div>
  </div>
</div>

              
            
!

CSS

              
                .scroll {
  overflow auto
}

.scene {
  height 200vh
  width 200vw
  padding 10vh 10vw
  background gray
}

.container {
  width 80vw
  height 80vh
  background lightgray
  border 1px solid black
  overflow auto
}

.element {
  width 50vw
  height 50vh
  background red
  position sticky
  top 5vh
  left 5vw
  border 1px solid black
}

.inner {
  background blue
  position absolute
  right 0
  bottom 0
  color white
}
              
            
!

JS

              
                
              
            
!
999px

Console