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Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation


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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.

  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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