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HTML

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CSS

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CSS Base

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JavaScript

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HTML 

              
                <section class="top">
  <div class="content">
    <img src="https://picsum.photos/300/300?random=1" alt="">
    <h1>Depth scrolling</h1>
    <p>Using scroll-driven animation, you can animate the content on the Z axis to create an effect of scrolling on the depth axis</p>
  </div>
  <div class="cube">
    <div></div><div></div><div></div><div></div>
  </div>
</section>
<section>
  <div class="content">
    <img src="https://picsum.photos/300/300?random=2" alt="">
    <h2>transitions</h2>
    <p>You can play around with the <code>opacity</code> and the <code>timing-function</code> to adjust the transition between the different sections</p>
  </div>
</section>
<section>
  <div class="content">
    <img src="https://picsum.photos/300/300?random=3" alt="">
    <h2>interactivity</h2>
    <p>since all sections are on top of each other, you can (should?) animate the <code>pointer-events</code> property to make each section clickable and selectable</p>
    <div class="buttons">
      <button>Click me</button>
      <button>Hover me</button>
    </div>
  </div>
</section>
<section>
  <div class="content">
    <img src="https://picsum.photos/300/300?random=4" alt="">
    <h2>Inner scroll</h2>
    <p>Each section can have an inner element that is also scrollable</p>
    <div class="scrollable">
      <p>Lorem ipsum dolor sit, amet consectetur adipisicing elit. Nostrum, dignissimos. Fuga natus officiis nobis accusamus a doloremque, voluptates, dolore porro blanditiis eligendi nam nulla consequatur quaerat aperiam voluptatum accusantium? Quaerat?</p>
      <p>Repellat beatae commodi earum placeat eos nostrum tempore, corporis ipsam quia rem ea fugiat dignissimos laboriosam nam perspiciatis voluptas delectus vitae accusamus? Dolore veritatis ratione, fuga eaque sapiente doloremque deleniti?</p>
      <p>Delectus amet nisi excepturi illo laudantium commodi ratione velit vel officia, non inventore sit voluptatibus totam saepe cupiditate iure! Odit possimus ipsa, magni molestiae voluptas officia dolore assumenda quod. Nihil.</p>
      <p>Quo exercitationem sunt aliquam? Consequatur optio a ab quibusdam minus provident exercitationem eius natus impedit, sapiente architecto hic ea doloremque nisi ad maiores, rem recusandae dignissimos ut labore corporis ipsum.</p>
      <p>Sequi, error fugit eveniet voluptas est sint ipsa sed ratione vel ad perspiciatis odio. Voluptatem quibusdam saepe necessitatibus obcaecati placeat dolorem dolores enim consectetur commodi. Autem facilis dolores aperiam eaque!</p>
    </div>
  </div>
</section>
<section>
  <div class="content">
    <img src="https://picsum.photos/300/300?random=5" alt="">
    <h2 class="center">Yes, scroll-driven animation is great! 😁</h2>
  </div>
</section>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Lobster&family=Open+Sans&display=swap');

*, *::before, *::after {
  padding: 0;
  margin: 0 auto;
  box-sizing: border-box;
}

body {
  font-family: 'Open Sans', sans-serif;
  background-color: #000;
  color: #000;
  height: 500vh;
}

h1, h2 {
  width: 100%;
  max-width: 40rem;
  font-family: 'Lobster', cursive;

  &.center {
    text-align: center;
  }
}

img {
  border-radius: 50%;
}

section {
  position: fixed;
  inset: 0;
  perspective: 1200px;
  animation: section linear both;
  animation-duration: auto;
  animation-timeline: scroll(block root);
  animation-range: var(--eventRange);

  *:not(:empty) {
    transform-style: preserve-3d;
  }

  @for $i from 0 to 5 {
    &:nth-child(#{$i + 1}) {
      --color: hsl(#{$i * 72} 75% 75%);
      --range: #{$i * 20%} #{$i * 20% + 40%};
      --eventRange: #{$i * 20% + 10%} #{$i * 20% + 30%};
      z-index: #{5 - $i};
    }
  }

  @keyframes section {
    0%, 100% { pointer-events: none; }
    25%, 75% { pointer-events: all; }
  }
}

.top {
  display: grid;
  place-items: center;
}

.cube {
  position: absolute;
  inset: 0;
  transform-origin: 50% 50% 50vmin;
  animation: cube ease-out forwards;
  animation-duration: auto;
  animation-timeline: scroll(block root);
  animation-range: 0% 20%;
  pointer-events: none;

  @keyframes cube {
    from { transform: translateZ(-12000px) rotateX(60deg) rotateZ(110deg); }
    to { transform: translateZ(0px) rotateX(0deg) rotateZ(0deg); }
  }

  & div {
    position: absolute;
    background-color: #fdf;
    box-shadow: 0 0 50px #000 inset;

    &:nth-child(1) {
      left: 0; top: 0;
      width: 100vmin; height: 100%;
      transform: rotateY(-90deg);
      transform-origin: left;
    }
    &:nth-child(2) {
      right: 0; top: 0;
      width: 100vmin; height: 100%;
      transform: rotateY(90deg);
      transform-origin: right;
    }
    &:nth-child(3) {
      left: 0; top: 0;
      width: 100%; height: 100vmin;
      transform: rotateX(90deg);
      transform-origin: top;
    }
    &:nth-child(4) {
      left: 0; bottom: 0;
      width: 100%; height: 100vmin;
      transform: rotateX(-90deg);
      transform-origin: bottom;
    }
  }
}

.content {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  background-color: var(--color);
  background-image:
    repeating-linear-gradient(#fff3 0 2px, transparent 0 40px),
    repeating-linear-gradient(90deg, #fff3 0 2px, transparent 0 40px);
  transform-origin: 50% 50% 50vmin;
  padding: 2em;
  font-size: 24px;
  overflow-y: auto;
  animation: content cubic-bezier(0,0,0,1) both;
  animation-duration: auto;
  animation-timeline: scroll(block root);
  animation-range: var(--range);

  .top & {
    animation-name: topContent;
  }

  @keyframes topContent {
    0% { transform: translateZ(-12000px) rotateX(60deg) rotateZ(110deg); opacity: 1; animation-timing-function: ease-out;}
    50% { transform: translateZ(0px) rotateX(0deg) rotateZ(0deg); opacity: 1; animation-timing-function: cubic-bezier(1,0,1,1); }
    100% { transform: translateZ(1200px) rotateX(0deg) rotateZ(0deg); opacity: 0; }
  }

  @keyframes content {
    0% { transform: translateZ(-12000px); opacity: 0; }
    50% { transform: translateZ(0px); opacity: 1; animation-timing-function: cubic-bezier(1,0,1,1); }
    100% { transform: translateZ(1200px); opacity: 0; }
  }

  p { max-width: 40rem; }
}

.buttons {
  margin-top: 1em;

  button {
    font: inherit;
    padding: 0.5em 1em;
    background-color: #fff;

    &:hover {
      background-color: pink;
    }

    &:active {
      background-color: maroon;
      color: #fff;
    }
  }
}

.scrollable {
  display: flex;
  flex-direction: column;
  gap: 1em;
  overscroll-behavior: contain;
  background-color: #fff7;
  margin-top: 1em;
  padding: 1em;
  max-height: 300px;
  overflow-y: scroll;
}
!

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