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. 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.

+ add another resource

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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

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

              
                .button__wrap
  button.button(style=`--hue: ${Math.random() * 360}`) Show me attention
  .button__shadow
              
            
!

CSS

              
                body
  min-height 100vh
  display flex
  align-items center
  justify-content center
  
.button
  cursor pointer
  padding 1rem 1.25rem
  color #fff
  font-weight bold
  font-size 1.25rem
  transition background .1s ease
  background 'hsl(%s, 100%, 50%)' % (var(--hue))
  outline-color 'hsl(%s, 100%, 80%)' % (var(--hue))
  animation flow 2s infinite ease-in-out
  
  &:hover
    background 'hsl(%s, 100%, 40%)' % (var(--hue))
    animation shake .1s infinite ease-in-out
    
    ~ .button__shadow
      animation none
      
  &:active
    background 'hsl(%s, 100%, 30%)' % (var(--hue))
    
    
  &__wrap
    position relative
    
  &__shadow
    position absolute
    border-radius 100%
    bottom 0
    left 0
    right 0
    height 4px
    background hsl(0, 10%, 85%)
    animation shadow 2s infinite ease-in-out
    z-index -1
  

@keyframes shadow
  0%, 100%
    transform scaleX(1)
    opacity 1
  50%
    opacity .2
    transform scaleX(.25)
    
@keyframes flow
  0%, 100%
    transform translate(0, 0)
  50%
    transform translate(0, -25%)
    
@keyframes shake
  0%, 100%
    transform translate(0, 0) rotate(0deg)
  25%
    transform translate(-1%, 3%) rotate(-2deg)
  50%
    transform translate(1%, 2%) rotate(2deg)
  75%
    transform translate(1%, -2%) rotate(-1deg)
              
            
!

JS

              
                
              
            
!
999px

Console