Pinned panels with overscroll

gsap.registerPlugin(ScrollTrigger);

var panels = gsap.utils.toArray(".section");
panels.pop();

panels.forEach((panel, i) => {
 
 // Get the element holding the content inside the panel
 let innerpanel = panel.querySelector(".section-inner");
 
 // Get the Height of the content inside the panel
 let panelHeight = innerpanel.offsetHeight;
 console.log(panelHeight)
 
 // Get the window height
 let windowHeight = window.innerHeight;
 
 let difference = panelHeight - windowHeight;
 
 // ratio (between 0 and 1) representing the portion of the overall animation that's for the fake-scrolling. We know that the scale & fade should happen over the course of 1 windowHeight, so we can figure out the ratio based on how far we must fake-scroll
 let fakeScrollRatio = difference > 0 ? (difference / (difference + windowHeight)) : 0;
 
 // if we need to fake scroll (because the panel is taller than the window), add the appropriate amount of margin to the bottom so that the next element comes in at the proper time.
 if (fakeScrollRatio) {
 panel.style.marginBottom = panelHeight * fakeScrollRatio + "px";
 }
 
 let tl = gsap.timeline({
 scrollTrigger:{
 trigger: panel,
 start: "bottom bottom",
 end: () => fakeScrollRatio ? `+=${innerpanel.offsetHeight}` : "bottom top",
 pinSpacing: false,
 pin: true,
 scrub: true
 }
 });
 
 // fake scroll. We use 1 because that's what the rest of the timeline consists of (0.9 scale + 0.1 fade)
 if (fakeScrollRatio) {
 tl.to(innerpanel, {yPercent:-100, y: window.innerHeight, duration: 1 / (1 - fakeScrollRatio) - 1, ease: "none"});
 }
 tl.fromTo(panel, {scale:1, opacity:1}, {scale: 0.7, opacity: 0.5, duration: 0.9})
 .to(panel, {opacity:0, duration: 0.1});
});

/* 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}

window.__STYLEGALLERY_ASSETS__={};
gsap.registerPlugin(ScrollTrigger);
var panels = gsap.utils.toArray(".section");
panels.pop();
panels.forEach((panel, i) => {
  let innerpanel = panel.querySelector(".section-inner");
  let panelHeight = innerpanel.offsetHeight;
  console.log(panelHeight);
  let windowHeight = window.innerHeight;
  let difference = panelHeight - windowHeight;
  let fakeScrollRatio = difference > 0 ? difference / (difference + windowHeight) : 0;
  if (fakeScrollRatio) {
    panel.style.marginBottom = panelHeight * fakeScrollRatio + "px";
  }
  let tl = gsap.timeline({
    scrollTrigger: {
      trigger: panel,
      start: "bottom bottom",
      end: () => fakeScrollRatio ? `+=${innerpanel.offsetHeight}` : "bottom top",
      pinSpacing: false,
      pin: true,
      scrub: true
    }
  });
  if (fakeScrollRatio) {
    tl.to(innerpanel, { yPercent: -100, y: window.innerHeight, duration: 1 / (1 - fakeScrollRatio) - 1, ease: "none" });
  }
  tl.fromTo(panel, { scale: 1, opacity: 1 }, { scale: 0.7, opacity: 0.5, duration: 0.9 }).to(panel, { opacity: 0, duration: 0.1 });
});

<!--

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 including without limitation the rights to use, copy, modify, 
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
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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.