Trigger On Scroll

gsap
 .timeline({
 paused: true,
 scrollTrigger: {
 markers: true,
 trigger: "#trigger-container",
 start: "0 60%",
 end: "100% 40%",
 toggleActions: "play reverse play reverse", //onEnter, onLeave, onEnterBack, onLeaveBack
 onEnter: () => text.innerText = "onEnter",
 onLeave: () => text.innerText = "onLeave",
 onEnterBack: () => text.innerText = "onEnterBack",
 onLeaveBack: () => text.innerText = "onLeaveBack"
 }
 })
 .to("#knob", {
 duration: 1,
 x: 93,
 ease: "expo.inOut"
 });


// changing the text in the bar
let inZone = false
ScrollTrigger.create({
 start: 0,
 end: "max",
 onUpdate: (self) => {
 if (self.direction !== self.prevDirection && !inZone) {
 gsap.to("#arrow", {
 rotation: self.direction === 1 ? 0 : -180,
 duration: 0.2,
 });
 self.prevDirection = self.direction;
 }
 }
});

/* 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}

body main{align-items:flex-start;padding-top:62vh}body #trigger-container{padding:20px;width:min(70vw,360px)}body .info{top:24px;transform:translateX(-50%);width:min(300px,90vw)}

window.__STYLEGALLERY_ASSETS__={};
gsap.timeline({
  paused: true,
  scrollTrigger: {
    markers: true,
    trigger: "#trigger-container",
    start: "0 60%",
    end: "100% 40%",
    toggleActions: "play reverse play reverse",
    //onEnter, onLeave, onEnterBack, onLeaveBack
    onEnter: () => text.innerText = "onEnter",
    onLeave: () => text.innerText = "onLeave",
    onEnterBack: () => text.innerText = "onEnterBack",
    onLeaveBack: () => text.innerText = "onLeaveBack"
  }
}).to("#knob", {
  duration: 1,
  x: 93,
  ease: "expo.inOut"
});
let inZone = false;
ScrollTrigger.create({
  start: 0,
  end: "max",
  onUpdate: (self) => {
    if (self.direction !== self.prevDirection && !inZone) {
      gsap.to("#arrow", {
        rotation: self.direction === 1 ? 0 : -180,
        duration: 0.2
      });
      self.prevDirection = self.direction;
    }
  }
});

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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.