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HTML

              
                <div style="height: 50vh; display: flexbox; align-items: center;">a</div>
<img src="https://pottertour.co.uk/imagesIndex/dragon.gif" style="transform: scaleX(-1); width: 200px" id="rec"/>
<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000">
  <path id="path" d="M0 100s269.931 86.612 520 0c250.069-86.612 480 0 480 0" stroke="black" stroke-width="1"/>
</svg>
              
            
!

CSS

              
                body {
    margin:0;
    width: 100%;
    height: 3000px;
    background:white;
    overflow-x: hidden;
  }

#rec {
    position: absolute;
    background-color: white;
    width: 200px;
}
              
            
!

JS

              
                gsap.registerPlugin(MotionPathPlugin);

// The start and end positions in terms of the page scroll
const offsetFromTop = innerHeight * 0.25;
const offsetFromLeft = innerWidth * 0.25;
const pathBB = document.querySelector("#path").getBoundingClientRect();
const startY = pathBB.top - innerHeight + offsetFromTop;
const startX = pathBB.right - innerWidth + offsetFromLeft;
const finishDistance = startY + pathBB.height - offsetFromTop;
const finishDistanceX = startX + pathBB.width - offsetFromLeft;

// the animation to use
var tween = gsap.to("#rec", {
  duration: 5, 
  paused: true,
  ease: "none",
  motionPath: {
    path: "#path",
    align: "#path",
    autoRotate: true,
    alignOrigin: [0.5, 0.5]
  }    
}).pause(0.001);

// Listen to the scroll event
document.addEventListener("scroll", function() {
  // Prevent the update from happening too often (throttle the scroll event)
  if (!requestId) {
    requestId = requestAnimationFrame(update);
  }
});

update();

function update() {
  // Update our animation
  tween.progress((scrollY - startX) / finishDistanceX);
  
  // Let the scroll event fire again
  requestId = null;
}

              
            
!
999px

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