Instructions

<link rel="stylesheet" href="https://unpkg.com/lenis@1.3.20/dist/lenis.css" />
<script src="https://unpkg.com/lenis@1.3.20/dist/lenis.min.js"></script> 
<script>
  gsap.registerPlugin(ScrollTrigger);

  const lenis = new Lenis({
    duration: 1.5,
    easing: (t) => 1 - Math.pow(1 - t, 3),
    smooth: true,
    smoothTouch: false, // ✅ important
  });

  // sync
  lenis.on('scroll', ScrollTrigger.update);

  // raf loop
  function raf(time) {
    lenis.raf(time);
    requestAnimationFrame(raf);
  }
  requestAnimationFrame(raf);

  // ✅ correct scroller
  ScrollTrigger.scrollerProxy(document.documentElement, {
    scrollTop(value) {
      return arguments.length ? lenis.scrollTo(value, { immediate: true }) : lenis.scroll;
    },
    getBoundingClientRect() {
      return {
        top: 0,
        left: 0,
        width: window.innerWidth,
        height: window.innerHeight,
      };
    },
  });

  // ✅ important
  ScrollTrigger.defaults({
    scroller: document.documentElement,
  });

  // refresh fix
  ScrollTrigger.addEventListener('refresh', () => lenis.resize());

  ScrollTrigger.refresh();
</script>