Pixelated Image Reveal

<script src="https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js"></script>

<section class="cloneable">
  <div data-hover="" data-pixelated-image-reveal="" class="pixelated-image-card">
    <div class="before__100"></div>
    <div class="pixelated-image-card__default">
      <img src="https://cdn.prod.website-files.com/6712ad33825977f9d2f1ba2c/6714d43a777a77da89a9b5ec_osmo-pixelated-image-1.jpg" width="400" alt="" class="pixelated-image-card__img">
    </div>
    <div data-pixelated-image-reveal-active="" class="pixelated-image-card__active">
      <img src="https://cdn.prod.website-files.com/6712ad33825977f9d2f1ba2c/6714d43a4d1abab1b3c81caf_osmo-pixelated-image-2.jpg" width="400" alt="" class="pixelated-image-card__img">
    </div>
    <div data-pixelated-image-reveal-grid="" class="pixelated-image-card__pixels">
      <div class="pixelated-image-card__pixel"></div>
    </div>
  </div>
</section>

.cloneable {
  padding: var(--container-padding);
  justify-content: center;
  align-items: center;
  min-height: 100svh;
  display: flex;
  position: relative;
}

.pixelated-image-card {
  background-color: var(--color-neutral-800);
  color: var(--color-primary);
  border-radius: .5em;
  width: 30vw;
  max-width: 100%;
  position: relative;
  overflow: hidden;
}

.before__100 {
  padding-top: 100%;
}

.pixelated-image-card__default, 
.pixelated-image-card__img,
.pixelated-image-card__active, 
.pixelated-image-card__pixels{
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.pixelated-image-card__active {
  display: none;
}

.pixelated-image-card__pixel {
  background-color: currentColor;
  width: 100%;
  height: 100%;
  display: none;
  position: absolute;
}

document.addEventListener('DOMContentLoaded', function () {
  const animationStepDuration = 0.3;
  const gridSize = 7; 
  const pixelSize = 100 / gridSize; 
  const cards = document.querySelectorAll('[data-pixelated-image-reveal]');
  const isTouchDevice = 'ontouchstart' in window || navigator.maxTouchPoints > 0 || window.matchMedia("(pointer: coarse)").matches;

  cards.forEach((card) => {
    const pixelGrid = card.querySelector('[data-pixelated-image-reveal-grid]');
    const activeCard = card.querySelector('[data-pixelated-image-reveal-active]');
    const existingPixels = pixelGrid.querySelectorAll('.pixelated-image-card__pixel');
    existingPixels.forEach(pixel => pixel.remove());
    
    for (let row = 0; row < gridSize; row++) {
      for (let col = 0; col < gridSize; col++) {
        const pixel = document.createElement('div');
        pixel.classList.add('pixelated-image-card__pixel');
        pixel.style.width = `${pixelSize}%`;
        pixel.style.height = `${pixelSize}%`;
        pixel.style.left = `${col * pixelSize}%`;
        pixel.style.top = `${row * pixelSize}%`;
        pixelGrid.appendChild(pixel);
      }
    }

    const pixels = pixelGrid.querySelectorAll('.pixelated-image-card__pixel');
    const totalPixels = pixels.length;
    const staggerDuration = animationStepDuration / totalPixels;
    let isActive = false;
    let delayedCall;

    const animatePixels = (activate) => {
      isActive = activate;
      gsap.killTweensOf(pixels);
      if (delayedCall) delayedCall.kill();
      gsap.set(pixels, { display: 'none' });
      
      gsap.to(pixels, {
        display: 'block',
        duration: 0,
        stagger: { each: staggerDuration, from: 'random' }
      });

      delayedCall = gsap.delayedCall(animationStepDuration, () => {
        activeCard.style.display = activate ? 'block' : 'none';
        activeCard.style.pointerEvents = activate ? 'none' : '';
      });

      gsap.to(pixels, {
        display: 'none',
        duration: 0,
        delay: animationStepDuration,
        stagger: { each: staggerDuration, from: 'random' }
      });
    };

    if (isTouchDevice) {
      card.addEventListener('click', () => animatePixels(!isActive));
    } else {
      card.addEventListener('mouseenter', () => {
        if (!isActive) animatePixels(true);
      });
      card.addEventListener('mouseleave', () => {
        if (isActive) animatePixels(false);
      });
    }
  });
});