Pen Settings

HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

Learn more · Versions

Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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.

Powered by Algolia
About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

You can also link to another Pen here (use the .css URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

Learn more · Versions

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.

Powered by Algolia
About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ 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.

Powered by Algolia
About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

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 

              
                - const sprinkleCount = 50
- const randomInRange = (max, min) => Math.floor(Math.random() * (max - min)) + min
- let durations = []
- const colors = ['#ff6698','#ffb366','#98ff66','#6698ff']
//- const sprinkles = new Array(sprinkleCount).fill().map(() => {
//- 	const characteristics = {
//-       speed: randomInRange(3, 8),
//-       delay: randomInRange(1, sprinklerCount / 4),
//-       top: randomInRange(0, 40),
//-       color: colors[Math.floor(Math.random() * colors.length)],
//-       rotation: randomInRange(0, 360),
//-       radius: randomInRange(0, 100),
//-       size: randomInRange(4, 15),
//-     }
//-     durations.push(characteristics.delay + characteristics.speed)
//-     return characteristics
//- })
- const sprinkles = Array(sprinkleCount).fill().map(()=>{const a={speed:randomInRange(3,8),delay:randomInRange(1,sprinkleCount/4),top:randomInRange(0,40),color:colors[Math.floor(Math.random()*colors.length)],rotation:randomInRange(0,360),radius:randomInRange(0,100),size:randomInRange(4,15)};return durations.push(a.delay+a.speed),a})
input(type='checkbox', id='cheat')
.cheat-box
  label(for='cheat') Zoom (Cheat 🐵)
form.game__container
  //- The start checkbox will show/hide the intro screen
  //- Clicking it reveal the moving blocks
  input.game__start(type='checkbox')
  //- The winning box needs to go here, it can appear after a certain time
  input.game__winning(type='checkbox', style=`--delay: ${Math.max(...durations) - 3};`)
  .game__header
    .game__header-content
      .game__title Cake 😋
      .game__sub-title.sub-text Click to start
  .game
    .board
      - let a = 0
      while a < sprinkleCount
        - const {speed, delay, top, color, rotation, size, radius } = sprinkles[a]
        .sprinkle(style=`--speed: ${speed}; --delay: ${delay}; --top: ${top}; --size: ${size}`)
          .sprinkle__shape(style=`--color: ${color}; --rotation: ${rotation}; --radius: ${radius}`)
        //- Bump the count
        - a++
      .game__over--internal
        .game__no-cake.sub-text No cake for you!<br>Click to restart
        input(type='reset', value='Restart')
      .win(style=`--delay: ${Math.max(...durations) - 3};`)
        .cake 🎂
  //- If we hover out of bounds, there needs to be a reset
  //- Otherwise it's going to be pretty easy to win 😅
  .game__over.sub-text Hover to restart
  .game__won
    .cake 🎂
    input(type='reset')
!

CSS 

              
                *
  box-sizing border-box


:root
  --active 1
  --gameTime $gameTime
  --bg #ffffff
  --body #65c6bb
  --primaryText #111
  --secondaryText #888

body
  align-items center
  background var(--body)
  display flex
  justify-content center
  min-height 100vh
  font-family -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif

$gameTime = 5

.game
  height 50px
  position absolute
  width 100px

  &__header
    font-size 1rem
    text-transform uppercase
    position absolute
    top 0
    left 0
    display flex
    height 50px
    width 100px
    align-items center
    justify-content center
    flex-direction column
    color var(--primaryText)
    background var(--bg)
    transform translate(0, 0)
    transition transform .25s ease 0s
    z-index 2

  &__start
    position absolute
    top 0
    right 0
    bottom 0
    left 0
    opacity 0
    cursor pointer
    height 100%
    width 100%
    z-index 3

  &__container
    background var(--bg)
    height 50px
    width 100px
    position relative
    overflow hidden
    margin 0
    transition box-shadow .25s ease 0s, transform .25s ease 0s
    box-shadow 4px 4px 2px 0px #444

    .game__start:checked ~ .game__over
      transform translate(0, 0)
      z-index 3

    .game__start:checked ~ .game__header
      transform translate(0, -100%)

    &:hover
      box-shadow 0 0 0 0 #444

      .game__start:checked

        & ~ .game__winning
          animation arrive 5s calc(var(--delay) * 1s) forwards

        & ~ .game__over
          transform translate(0, -100%)

        & ~ .game
          --active 0
          cursor crosshair
          z-index 3

          .win
            animation arrive 5s calc(var(--delay) * 1s) forwards

          .cake
            animation pulse 4s calc((var(--delay) + 5) * 1s) infinite linear

          .sprinkle
            animation travel calc(var(--speed) * 1s) calc(var(--delay) * 1s) linear forwards

            &:hover
              animation none
              background var(--bg)
              top 0
              right 0
              bottom 0
              left 0
              height 50px
              width 100px
              transform translate(0, 0)
              z-index 3

              .sprinkle__shape
                visibility hidden

              // If we hover over an sprinkle we need to display a way for the user to reset
              ~ .game__over--internal
                background var(--bg)
                display flex
                z-index 5
                transform translate(0, 0)


.game__over--internal
  position absolute
  top 0
  right 0
  bottom 0
  left 0
  display flex
  align-items center
  justify-content center
  transform translate(0, 100%)
  transition transform .25s ease 0s

  &:hover
    display flex
    background var(--bg)
    transform translate(0, 0)
    z-index 5

label
input
  cursor pointer

.cheat-box
  position absolute
  top 1rem
  right 2rem
  text-transform uppercase
  font-size 0.6rem

#cheat
  position absolute
  top .85rem
  right 1rem

  &:checked ~ form
    transform scale(2.5)

.game__over
  background var(--bg)
  position absolute
  top 0
  right 0
  bottom 100%
  height 50px
  width 100px
  line-height 50px
  left 0
  // z-index 5
  text-align center
  transition transform .25s ease 0s
  transform translate(0, -100%)

.board
  position absolute
  top 0
  right 0
  bottom 0
  left 0
  background var(--bg)
  transition transform .25s ease 0s
  transform translate(0, calc(var(--active) * 100%))

// Overlay the reset button so that a user can click anywhere to restart
[type='reset']
  position absolute
  top 0
  left 0
  height 50px
  width 100px
  opacity 0
  cursor pointer

.sub-text
  font-size 0.6rem
  white-space nowrap
  color var(--secondaryText)
  text-transform uppercase

/**
  * Dots that need to be avoided, infinite animation for debugging
  */
.sprinkle
  height calc(var(--size) * 1px)
  width calc(var(--size) * 1px)
  position absolute
  top calc(var(--top) * 1px)
  left calc((var(--size) * 1px) + 100%)

  &__shape
    background var(--color)
    position absolute
    top 50%
    left 50%
    height 100%
    width 100%
    border-radius calc(var(--radius) * 1%)
    transform translate(-50%, -50%) rotate(calc(var(--rotation) * 1deg))

.win
  height 50px
  width 100px
  position absolute
  top 0
  left 0
  font-size 2rem
  display flex
  align-items center
  justify-content center
  transform translate(100%, 0)

.game__winning
  height 2.5rem
  width 2.5rem
  opacity 0
  position absolute
  top 50%
  left 50%
  margin-left -1.25rem
  margin-top -1.25rem
  cursor pointer
  transform translate(150px, 0)
  z-index 5

  &:checked ~ .game__won
    display block


.game__won
  background orange
  position absolute
  top 0
  right 0
  bottom 0
  left 0
  z-index 6
  font-size 2.2rem
  text-align center
  display none
  animation party .8s infinite linear

  .cake
    position absolute
    top 50%
    left 50%
    transform translate(-50%, -50%)


// ANIMATIONS
@keyframes travel
  to
    transform translate(calc((var(--size) + 150) * -1px), 0)

@keyframes arrive
  to
    transform translate(0, 0)

@keyframes pulse
  50%
    transform scale(1.1)

@keyframes party
  0%
    background #8585ff
  30%
    background #ff85c2
  55%
    background #85ffc2
  80%
    background #ffff85


// @keyframes score
//   from
//     counter-increment score 0
//   to
//     counter-increment score 100
/**
  * Thought this was quite cool. Can increment a counter via keyframes.
  * Quite some possibilities with this. You could tell someone how far
  * they got etc. maybe?
  */
// @keyframes score
//   for $second in (0...$gameTime)
//     {(100 / $gameTime * $second) * 1%}
//       counter-increment score floor((100 / $gameTime) * $second)
!

JS 

              
                // Nope 😁
!
999px

Console