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Pen Settings

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. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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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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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


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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.

  label(for="btn") click
  background-color #000
  color #fff
  position fixed
  top 0
  left 0
  width 100%
  height 100%
  display flex
  flex-flow column nowrap
  align-items center
  justify-content center
  border none
  outline none
  box-shadow none
  background none
  color currentColor
  padding 0
  cursor pointer

  width 25px
  height 25px
  position relative
    content ' '
    position absolute
    background-color #fff
    display block
    width 100%
    height 3px
    left 0
    top 11px
    border-radius 3px
    transition all .5s
    transform-origin 50% 50%
    transform translateY(-6px)
    box-shadow 0 6px 0 0 #fff
    transform rotateZ(45deg) translateY(0)
    box-shadow 0 0 0 0 #fff
    transform rotateZ(135deg) translateY(0)
              let btn = document.querySelector('#jsBtn')
let status = true
let focus = function () {
  setTimeout(() => {
    // status && blur()
 }, 2000)
let blur = function () {
  setTimeout(() => {
    status && focus()
  }, 2000)


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