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HTML

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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.

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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.

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Insecure Resource

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CSS

About CSS Preprocessors

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

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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).

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JavaScript

About JavaScript Preprocessors

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

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Babel includes JSX processing.

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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.

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Packages

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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.

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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.

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HTML 

              
                #wrap
 -6.times do
  .row
   -6.times do
    .cell
     .inner
      %svg{"data-name" => "Layer 1", :viewbox => "0 0 800 800", :xmlns => "http://www.w3.org/2000/svg"}
       %path.squig{:d => "M 0 400 Q 120 400 120 500 L 120 660 Q 120 760 180 760 Q 240 760 240 660 L 240 140 Q 240 40 300 40 Q 360 40 360 140 L 360 660 Q 360 760 420 760 Q 480 760 480 660 L 480 140 Q 480 40 540 40 Q 600 40 600 140 L 600 660 Q 600 760 660 760 Q 720 760 720 660 L 720 480 Q 720 400 800 400 "}
%span hover me / click me
!

CSS 

              
                body{
  display:grid;
  place-items:center;
  height:100vh;
  width:100vw;
  background:darken(#c9fff2, 20%);
  transition:0.3s ease-in-out;
  overflow:hidden;
  &.dark{
    background:darken(#c9fff2, 70%);
    &:before, &:after{
      filter:brightness(0.25) hue-rotate(15deg) saturate(5);
    }
    #wrap, #wrap:hover{
      .row{
        &:before{
          background:darken(#c9fff2, 70%);
          box-shadow:inset -50px -50px 0 0 rgba(245,240,192, 0.25);
          transition:0.3s ease-in-out, transform 1s ease-in-out;
          transition-delay:0.5s;
          transform:scale(0.4) translateY(-250px) translateX(500px);
        }
      }
    }
    .cell{
      filter:brightness(0.5);
    }
  }
  span{
    position:absolute;
    bottom:50px;
    width:100%;
    text-align:center;
    left:0;
    z-index:10;
    font-size:12px;
    color:rgba(0,0,0,0.5);
  }
  &:before, &:after{
    pointer-events:none;
    transition:1s ease-in-out;
  }
  &:after{
    content:'';
    position:absolute;
    width:440px;
    height:440px;
    box-shadow:0 20px 40px -10px rgba(0,0,0,0.5), 0 0 0 40px lighten(#c9fff2, 10%);
    z-index:9;
    border-radius:10px;
  }
  &:before{
    content:'';
    position:absolute;
    width:100%;
    height:100%;
    z-index:8;
    background:radial-gradient(circle at center, lighten(#c9fff2, 10%) 300px, #c9fff2);
    mask:linear-gradient(to bottom, #000 calc(50% - 225px), transparent calc(50% - 225px), transparent calc(50% + 225px), #000 calc(50% + 225px)), linear-gradient(to right, #000 calc(50% - 225px), transparent calc(50% - 225px), transparent calc(50% + 225px), #000 calc(50% + 225px));
  }
  --path:path("M 0 400 Q 110 400 110 330 L 110 130 Q 110 60 170 60 Q 230 60 230 130 L 230 590 Q 230 660 290 660 Q 350 660 350 590 L 350 290 Q 350 220 410 220 Q 470 220 470 290 L 470 500 Q 470 570 530 570 Q 590 570 590 500 L 590 160 Q 590 90 650 90 Q 710 90 710 160 L 710 320 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path1:path("M 0 400 Q 110 400 110 330 L 110 130 Q 110 60 170 60 Q 230 60 230 130 L 230 590 Q 230 660 290 660 Q 350 660 350 590 L 350 290 Q 350 220 410 220 Q 470 220 470 290 L 470 500 Q 470 570 530 570 Q 590 570 590 500 L 590 160 Q 590 90 650 90 Q 710 90 710 160 L 710 320 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path2: path("M 0 400 Q 110 400 110 330 L 110 260 Q 110 190 170 190 Q 230 190 230 260 L 230 360 Q 230 440 290 440 Q 350 440 350 360 L 350 290 Q 350 220 410 220 Q 470 220 470 290 L 470 560 Q 470 640 530 640 Q 590 640 590 560 L 590 140 Q 590 70 650 70 Q 710 70 710 140 L 710 320 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path3: path("M 0 400 Q 110 400 110 400 L 140 400 Q 170 400 170 400 Q 200 400 230 400 L 260 400 Q 280 400 300 400 Q 350 400 350 330 L 350 290 Q 350 220 410 220 Q 470 220 470 290 L 470 560 Q 470 640 530 640 Q 590 640 590 560 L 590 140 Q 590 70 650 70 Q 710 70 710 140 L 710 320 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path4: path("M 0 400 Q 80 400 80 470 L 80 620 Q 80 700 140 700 Q 200 700 200 620 L 200 480 Q 200 390 300 400 Q 350 400 350 330 L 350 290 Q 350 220 410 220 Q 470 220 450 220 L 490 220 Q 510 220 530 220 Q 590 220 590 160 L 590 140 Q 590 70 650 70 Q 710 70 710 140 L 710 320 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path5: path("M 0 400 Q 80 400 80 470 L 80 620 Q 80 700 170 700 Q 260 700 260 620 L 260 520 Q 260 470 260 290 Q 260 220 330 220 L 370 220 Q 390 220 410 220 Q 470 220 450 220 L 490 220 Q 510 220 530 220 Q 580 220 590 280 L 590 500 Q 590 580 650 580 Q 710 580 710 500 L 710 470 Q 710 400 800 400 L 800 800 L 0 800 L 0 40");
  --path6: path("M 0 400 Q 80 400 80 470 L 80 620 Q 80 700 170 700 Q 260 700 260 620 L 260 520 Q 260 470 260 290 Q 260 220 330 220 L 330 220 Q 390 220 390 110 Q 390 50 450 50 L 520 50 Q 580 50 580 110 Q 580 220 580 280 L 580 500 Q 580 580 650 580 Q 710 580 710 500 L 710 470 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path7:path("M 0 400 Q 80 400 80 400 L 120 400 Q 140 400 160 400 Q 190 400 210 400 L 240 400 Q 260 400 270 400 Q 290 400 310 400 L 340 400 Q 390 400 430 400 Q 450 400 470 400 L 520 400 Q 540 400 550 400 Q 570 400 580 400 L 610 400 Q 650 400 680 400 Q 700 400 710 400 L 730 400 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path8:path("M 0 400 Q 80 400 80 400 L 120 400 Q 140 400 160 400 Q 190 400 210 400 L 240 400 Q 260 400 270 400 Q 290 400 310 400 L 340 400 Q 390 400 430 400 Q 450 400 470 400 L 520 400 Q 540 400 550 400 Q 570 400 580 400 L 610 400 Q 650 400 680 400 Q 700 400 710 400 L 730 400 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  --path9:path("M 0 400 Q 80 400 80 400 L 120 400 Q 140 400 160 400 Q 190 400 210 400 L 240 400 Q 260 400 270 400 Q 290 400 310 400 L 340 400 Q 390 400 430 400 Q 450 400 470 400 L 520 400 Q 540 400 550 400 Q 570 400 580 400 L 610 400 Q 650 400 680 400 Q 700 400 710 400 L 730 400 Q 710 400 800 400 L 800 800 L 0 800 L 0 400 ");
  perspective:800px;
  --color1: #422B38;
  --color2: #7F415C;
  --color3: #B83F6C;
  --color4: #EB2E5C;
  --color5: #FD6765;
  --color6: #F89275;
  --color7: #FDDA92;
    #wrap:hover{
      transform:scale(0.5) scaleX(1.25) rotateX(50deg);
      .row{
        @for $i from 1 through 6{
          &:nth-of-type(#{$i}){
            transform:translateY(#{($i - 1) * 5}px) rotateX(-50deg) skewY(-2.5deg);
            &:nth-of-type(odd){
              transform:translateY(#{($i - 1) * 5}px) rotateX(-50deg) skewY(2.5deg);
            }
          }
        }
        &:before{
          top:-200px;
          box-shadow:0 0 0 40px rgba(245,240,192, 0.25), 0 0 1000px 100px rgba(0,0,0,0.15);
          transition:top 2s ease-in-out, box-shadow 2s ease-in-out, transform 0.3s ease-in-out;
        }
      }
    }
  #wrap{
    cursor:pointer;
    width:800px;
    height:800px;
    position:relative;
    display:grid;
    grid-template-columns: 1;
    grid-template-rows: repeat(6, 1fr);
    grid-column-gap: 0px;
    grid-row-gap: 0px;
    transform-style:preserve-3d;
    transform:scale(0.6) rotateX(0deg) translateY(40px);
    transition:1s ease-in-out;
    box-shadow:0 20px 40px -10px rgba(0,0,0,0.25);
    .row{
      display:grid;
      grid-column-gap: 0px;
      grid-row-gap: 0px;
      grid-template-columns: repeat(6, 1fr);
      position:relative;
      transform-style:preserve-3d;
      transform-origin:bottom;
      transform:rotateX(0deg) translateY(-10px) skewY(-2.5deg);
      transition:1s ease-in-out;
      &:nth-of-type(even){
        transform:rotateX(0deg) translateY(-10px) skewY(2.5deg);
      }
      &:before{
        position:absolute;
        width:calc(100% + 50px);
        background:rgba(245,240,192, 0.75);
        width:200px;
        height:250px;
        border-radius:100%;
        left:calc(50% - 100px);
        top:100%;
        transition:0.3s ease-in-out;
        transform:translateZ(-10px);
      }
      &:first-of-type{
        &:before{
         content:'';
         }
      }
      @for $i from 1 through 6{
        &:nth-of-type(#{$i}){
          .cell{
            background:linear-gradient(to bottom, var(--color#{(7 - $i) + 1}), var(--color#{7 - $i}));
            box-shadow:0 50px 0 var(--color#{7 - $i});
            transition:filter 0.2s ease-in-out;
            &:before, &:after{
              background:linear-gradient(to bottom, var(--color#{(7 - $i) + 1}) 33.333%, var(--color#{7 - $i}));
            }
            .inner{
              transition-delay:#{$i/12}s;
            }
            svg{
              
              path{
                fill:var(--color#{(7 - $i) + 1});
                transition-delay:#{$i/12}s;
              }
            }
          }
        }
      }
    }
    .cell{
      position:relative;
      z-index:2;
      transform-style:preserve-3d;
      transform-origin:50% 200%;
      margin:0 -1px;
      &:before, &:after{
        content:'';
        position:absolute;
        width:25px;
        height:calc(150% - 1px);
        top:calc(-50% + 1px);
        left:-24px;
        border-radius:10px 0 0 10px;
      }
      &:after{
        left:auto;
        right:-24px;
        border-radius:0 10px 10px 0;
      }
      &.cell1{
        .inner{
          transform:scaleX(2);
          height:calc(100% + 1px);
        }
      }
      .inner{
        position:absolute;
        transform-style:preserve-3d;
        width:100%;
        height:100%;
        overflow:hidden;
        top:-100%;
        left:0;
        transform-origin:left;
        transition:0.3s ease-in-out;
      }
    }
    svg{
      position:absolute;
      width:107.5%;
      height:107.5%;
      left:-3.25%;
      top:-3.25%;
      z-index:-1;
      transform-style:preserve-3d;
      path{
        fill:#ccc;
        stroke-linecap:rounded;
        d:var(--path);
        transition:d 0.3s ease-in-out;
      }
    }
  }
}
!

JS 

              
                function draw() {
  document.querySelectorAll(".cell").forEach((cell) => {
    cell.style.setProperty(
      "--path",
      "var(--path" + (Math.floor(Math.random() * 9) + 1) + ")"
    );
    for (j = 1; j < 4; j++) {
      cell.classList.remove("cell" + j);
    }
    cell.classList.add("cell" + Math.floor(Math.random() * 3));
  });
}

draw();

setInterval(function (event) {
  draw();
}, 3000);

document.addEventListener(
  "click",
  function (event) {
    document.body.classList.toggle("dark");
  },
  false
);
!
999px

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