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 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

              
                .container Move your cursor!
              
            
!

CSS

              
                *
  box-sizing border-box
  
body
  min-height 100vh
  font-weight bold
  font-size 1.15rem
  font-family sans-serif
  text-align center
  display grid
  place-items center
  background hsl(180, 50%, 50%)
  
.container
  height 135px
  width 135px
  background hsl(25, 50%, 80%)
  display grid
  place-content center
  border-radius 50%
  position relative
  
  &:after
    content ''
    position absolute
    top 50%
    left 50%
    height 200px
    width 200px
    border-radius 50%
    background hsla(280, 50%, 80%, 0.5)
    transform translate(-50%, -50%)
    z-index -1
              
            
!

JS

              
                import gsap from 'https://cdn.skypack.dev/gsap'

const CONTAINER = document.querySelector('.container')

const generateHandler = (element, proximity, cb) => ({x, y}) => {
  const bounds = 100
  const elementBounds = element.getBoundingClientRect()
  const centerX = elementBounds.left + elementBounds.width / 2
  const centerY = elementBounds.top + elementBounds.height / 2
  const boundX = gsap.utils.mapRange(centerX - proximity, centerX + proximity, -bounds, bounds, x)
  const boundY = gsap.utils.mapRange(centerY - proximity, centerY + proximity, -bounds, bounds, y)
  cb(boundX / 100, boundY / 100)
}

document.addEventListener('pointermove', generateHandler(CONTAINER, 100, (x, y) => {
  CONTAINER.innerText = `x: ${x.toFixed(1)}; y: ${y.toFixed(1)};`
}))
              
            
!
999px

Console