Infinite looped panels

gsap.registerPlugin(ScrollTrigger);

let panels = gsap.utils.toArray(".panel"),
 copy = panels[0].cloneNode(true);
panels[0].parentNode.appendChild(copy); // copy the first panel to the end (for seamless looping)

panels.forEach((panel, i) => {
 ScrollTrigger.create({
 trigger: panel,
 start: "top top", 
 pin: true, 
 pinSpacing: false 
 });
});

let maxScroll;
let pageScrollTrigger = ScrollTrigger.create({ // snap whole page to the closest section!
 // normally we'd just do snap: 1 / panels.length but we'll use a function-based value so that we can handle the very start and end values in a special way to prevent looping on the snap
 snap(value) {
 let snappedValue = gsap.utils.snap(1 / panels.length, value);
 if (snappedValue <= 0) { // don't let it go all the way back to exactly 0 or it'll wrap. Keep it a bit more than 1px from the top.
 return 1.05 / maxScroll;
 } else if (snappedValue >= 1) { // don't let it go all the way to the end or it'll wrap. Keep it a bit more than 1px from the bottom. 
 return maxScroll / (maxScroll + 1.05);
 }
 return snappedValue;
 } 
});
function onResize() {
 maxScroll = ScrollTrigger.maxScroll(window) - 1;
}
onResize();
window.addEventListener("resize", onResize);
// make sure we use a non-passive event listener so that we can preventDefault() on the scroll if it's at the very top or bottom
window.addEventListener("scroll", e => {
 let scroll = pageScrollTrigger.scroll()
 if (scroll > maxScroll) {
 pageScrollTrigger.scroll(1);
 e.preventDefault();
 } else if (scroll < 1) {
 pageScrollTrigger.scroll(maxScroll - 1);
 e.preventDefault();
 }
}, {passive: false});

/* StyleGallery host styles: independent replacement for unavailable shared Pen CSS. */
:root{--color-just-black:#111522;--color-surface-white:#f7f3ec;--color-surface75:#cfccc6;--color-surface50:#898e9f;--color-surface25:#414859;--color-shockingly-green:#95efd2;--color-lt-green:#b5f4da;--color-pink:#fbadce;--color-purple:#897dff;--color-lilac:#b5a1ff;--color-orangey:#ffd28c;--color-blue:#75d8ed;--color-ui-gradient:linear-gradient(135deg,#fbadce,#897dff);--color-ui-gradient-background:linear-gradient(135deg,#fbadce,#897dff);--color-text-gradient:linear-gradient(135deg,#fbadce,#897dff);--gradient-summer-fair:linear-gradient(135deg,#ffd28c,#fbadce);--gradient-lipstick:linear-gradient(135deg,#fbadce,#fc7f8e);--gradient-macha:linear-gradient(135deg,#b5f4da,#75d8ed);--color-grey:#898e9f;--color-grey-dark:#414859;--color-scroll-pink-lt:#fbadce;--color-text-purple:#b5a1ff;--surface50:#898e9f;--light:#f7f3ec;--dark:#111522;--mid:#898e9f}
*{box-sizing:border-box}body{background:#111522;color:#f7f3ec;font-family:system-ui,sans-serif;margin:0;min-height:100vh;width:100%}button,input{font:inherit}button,.button{background:#111522;border:1px solid #898e9f;border-radius:.55rem;color:#f7f3ec;cursor:pointer;padding:.65rem 1rem}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #95efd2;outline-offset:4px}h1,h2,h3,h4{line-height:1.15}h4{font-weight:500}code{font-family:ui-monospace,monospace}.heading-l{font-size:clamp(2rem,6vw,5rem)}.heading-text{font-size:clamp(1.5rem,4vw,3rem)}.box{background:#95efd2;border-radius:14px;height:clamp(38px,12vw,80px);width:clamp(38px,12vw,80px)}.green{background:#95efd2}.purple{background:#897dff}.orange{background:#ffd28c}.gradient-pink{background:linear-gradient(140deg,#fbadce,#fc7f8e)}.gradient-purple{background:linear-gradient(140deg,#b5a1ff,#537ff7)}.center{align-items:center;display:flex;justify-content:center}.text-center{text-align:center}.panel{min-height:100vh;width:100%}.flair:not(img){background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNDgiIGhlaWdodD0iMjQ4IiB2aWV3Qm94PSIwIDAgMjQ4IDI0OCI+PGRlZnM+PGxpbmVhckdyYWRpZW50IGlkPSJnIiB4Mj0iMSIgeTI9IjEiPjxzdG9wIHN0b3AtY29sb3I9IiNiNWExZmYiLz48c3RvcCBvZmZzZXQ9IjEiIHN0b3AtY29sb3I9IiM3NWQ4ZWQiLz48L2xpbmVhckdyYWRpZW50PjwvZGVmcz48ZyBmaWxsPSJ1cmwoI2cpIj48cGF0aCBkPSJNODcgMjBoNzR2NjdoNjd2NzRoLTY3djY3SDg3di02N0gyMFY4N2g2N1oiLz48L2c+PC9zdmc+");background-position:center;background-repeat:no-repeat;background-size:contain;height:80px;width:80px}.flair--3:not(img){background-image:url("data:image/svg+xml;base64,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")}.braces{font-size:1rem}img{max-width:100%}
/* External font programs are omitted; preserve readable fallback typography. */
body,button,input,h1,h2,h3,h4,p,span,div{font-family:inherit}body{font-family:system-ui,sans-serif}code,pre{font-family:ui-monospace,monospace}

/* Locally authored presentation for panels whose shared stylesheet was not acquired. */
.panel{align-items:center;display:flex;flex-direction:column;justify-content:center;padding:2rem;text-align:center}.panel__number{font-size:clamp(6rem,25vw,16rem);font-weight:700}.blue{background:#537ff7}.panel h1{font-size:clamp(2rem,6vw,4rem)}

window.__STYLEGALLERY_ASSETS__={};
gsap.registerPlugin(ScrollTrigger);
let panels = gsap.utils.toArray(".panel"), copy = panels[0].cloneNode(true);
panels[0].parentNode.appendChild(copy);
panels.forEach((panel, i) => {
  ScrollTrigger.create({
    trigger: panel,
    start: "top top",
    pin: true,
    pinSpacing: false
  });
});
let maxScroll;
let pageScrollTrigger = ScrollTrigger.create({
  // snap whole page to the closest section!
  // normally we'd just do snap: 1 / panels.length but we'll use a function-based value so that we can handle the very start and end values in a special way to prevent looping on the snap
  snap(value) {
    let snappedValue = gsap.utils.snap(1 / panels.length, value);
    if (snappedValue <= 0) {
      return 1.05 / maxScroll;
    } else if (snappedValue >= 1) {
      return maxScroll / (maxScroll + 1.05);
    }
    return snappedValue;
  }
});
function onResize() {
  maxScroll = ScrollTrigger.maxScroll(window) - 1;
}
onResize();
window.addEventListener("resize", onResize);
window.addEventListener("scroll", (e) => {
  let scroll = pageScrollTrigger.scroll();
  if (scroll > maxScroll) {
    pageScrollTrigger.scroll(1);
    e.preventDefault();
  } else if (scroll < 1) {
    pageScrollTrigger.scroll(maxScroll - 1);
    e.preventDefault();
  }
}, { passive: false });

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GSAP 3.15.0
Copyright 2026, GreenSock. All rights reserved.
Subject to the Standard No Charge License: https://gsap.com/standard-license.
The full notice in each original GSAP library file is preserved.


StyleGallery host adapter and replacement SVG subjects: locally authored.