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

              
                <div class="tab_contents">
  <input id="tab-1" type="radio" name="tab_item" checked>
  <label class="tab_item" for="tab-1">tab 1</label>
  <input id="tab-2" type="radio" name="tab_item">
  <label class="tab_item" for="tab-2">tab 2</label>
  <input id="tab-3" type="radio" name="tab_item">
  <label class="tab_item" for="tab-3">tab 3</label>
  <div class="clear"></div>
  <div id="tab-b1">
    <h1>tab 1 contents</h4>
  </div>
  <div id="tab-b2">
    <h1>tab 2 contents</h4>
  </div>
  <div id="tab-b3">
    <h1>tab 3 contents</h4>
  </div>
</div><!--tab5-->
              
            
!

CSS

              
                .tab_contents
  width: 100%
  label
    display: inline-block
    margin: 0
    padding: 0
  .tab_item
    box-sizing: border-box
    display: block
    float: left
    width: calc((100% - 2em) / 3)
    cursor: pointer
    background: white
    border: #6eaa2e 1px solid
    color: #6eaa2e
    transition: .2s
    text-align: center
    letter-spacing: .2em
    padding: 1em
    margin-top: .4em
    &:not-first-of-type
      margin-left: 1em
    @media only screen and (max-width:750px)
      width: calc((100% - 1.2em) / 3)
      padding: .5em 1em
      &:not-first-of-type
        margin-left: .4em
    &:hover
      background: #6eaa2e
      color: white
  input:checked + label
    background: #6eaa2e
    color: white
    padding:
      top: 1.2em
      bottom: 1.2em
    margin-top: 0
      margin-left: 1em
    @media only screen and (max-width:750px)
      padding: .5em 1em
      margin-top: .4em
  input
    display: none
  #tab-b1,
  #tab-b2,
  #tab-b3,
  #tab-b4
    display: none
  #tab-1:checked ~ #tab-b1,
  #tab-2:checked ~ #tab-b2,
  #tab-3:checked ~ #tab-b3,
  #tab-4:checked ~ #tab-b4
    display: block
  .clear
    &::after
      content: ''
      display: block
      clear: both
              
            
!

JS

              
                
              
            
!
999px

Console