Apply marquee effect to text

by Jordan Sayner

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.11.5/gsap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.11.5/ScrollTrigger.min.js"></script>
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<section class="home-hero_section"><img src="https://assets.website-files.com/63b6f4497a8b7545922c200a/63b79f31efdaa8435776b63b_894164_All8Flavors_Cans_TropicalBerry_020821.png" alt="" class="home-hero_img"><div tr-marquee-scrolldirection="true" tr-marquee-element="component" class="marquee-text_component"><div class="marquee-text_wrapper"><div tr-marquee-element="panel" class="marquee-text_panel" style="translate: none; rotate: none; scale: none; transform: translate(-39.7212%, 0%) translate3d(0px, 0px, 0px);"><div class="marquee-text_text">BOOSTING IMMUNITY</div><img src="https://assets.website-files.com/63b6f4497a8b7545922c200a/63b79e762ba2a51e3b81f866_bolt.svg" alt="" class="marquee-text_icon"></div><div tr-marquee-element="panel" class="marquee-text_panel" style="translate: none; rotate: none; scale: none; transform: translate(-39.7212%, 0%) translate3d(0px, 0px, 0px);"><div class="marquee-text_text">BOOSTING IMMUNITY</div><img src="https://assets.website-files.com/63b6f4497a8b7545922c200a/63b79e762ba2a51e3b81f866_bolt.svg" alt="" class="marquee-text_icon"></div></div></div><div tr-marquee-reverse="true" tr-marquee-element="component" tr-marquee-scrolldirection="true" class="marquee-text_component is-2"><div class="marquee-text_wrapper is-2"><div tr-marquee-element="panel" class="marquee-text_panel" style="translate: none; rotate: none; scale: none; transform: translate(48.1281%, 0%) translate3d(0px, 0px, 0px);"><div class="marquee-text_text">INCREASING ENDURANCE</div><img src="https://assets.website-files.com/63b6f4497a8b7545922c200a/63b79e762ba2a51e3b81f866_bolt.svg" alt="" class="marquee-text_icon"></div><div tr-marquee-element="panel"...

CSS

.home-hero_section {
	display: -webkit-box;
	display: -webkit-flex;
	display: -ms-flexbox;
	display: flex
;
	min-height: 100vh;
	-webkit-box-orient: vertical;
	-webkit-box-direction: normal;
	-webkit-flex-direction: column;
	-ms-flex-direction: column;
	flex-direction: column;
	-webkit-box-pack: center;
	-webkit-justify-content: center;
	-ms-flex-pack: center;
	justify-content: center;
	-webkit-box-align: center;
	-webkit-align-items: center;
	-ms-flex-align: center;
	align-items: center;
	background-image: -webkit-gradient(linear, left top, left bottom, from(#caf587), color-stop(81%, transparent));
	background-image: linear-gradient(180deg, #caf587, transparent 81%);
}
.home-hero_img {
	position: absolute;
	z-index: 2;
	display: block;
	width: 25%;
	max-width: 48vh;
	-webkit-transform: rotate(-9deg);
	-ms-transform: rotate(-9deg);
	transform: rotate(-9deg);
	pointer-events: none;
}

.marquee-text_component {
	width: 100%;
	-webkit-box-orient: vertical;
	-webkit-box-direction: normal;
	-webkit-flex-direction: column;
	-ms-flex-direction: column;
	flex-direction: column;
	font-size: 1.2vw;
}

.marquee-text_wrapper {
	display: -webkit-box;
	display: -webkit-flex;
	display: -ms-flexbox;
	display: flex;
	overflow: hidden;
	width: 100%;
	-webkit-box-pack: start;
	-webkit-justify-content: flex-start;
	-ms-flex-pack: start;
	justify-content: flex-start;
	-webkit-box-align: center;
	-webkit-align-items: center;
	-ms-flex-align: center;
	align-items: center;
	-webkit-box-flex: 0;
	-webkit-flex: 0 0 auto;
	-ms-flex: 0 0 auto;
	flex: 0 0 auto;
}

.marquee-text_panel {
	display: -webkit-box;
	display: -webkit-flex;
	display: -ms-flexbox;
	display: flex;
	-webkit-box-pack: start;
	-webkit-justify-content: flex-start;
	-ms-flex-pack: start;
	justify-content: flex-start;
	-webkit-box-align: center;
	-webkit-align-items: center;
	-ms-flex-align: center;
	align-items: center;
	-webkit-box-flex:...

JavaScript

document.querySelectorAll("[tr-marquee-element='component']").forEach((component, index) => {
    const panels = component.querySelectorAll("[tr-marquee-element='panel']");

    const speed = 100;
    const baseSpeed = panels[0].offsetWidth;
    const duration = baseSpeed / speed;

    const normalMoveDist = index % 2 === 0 ? -100 : 100;

    const timeline = gsap.timeline({ repeat: -1, defaults: { ease: "none" } });
    timeline.fromTo(panels, { xPercent: 0 }, { xPercent: normalMoveDist, duration });

    timeline.timeScale(1);

    let resetSpeedTimeout;

    ScrollTrigger.create({
      trigger: "body",
      start: "top top",
      end: "bottom bottom",
      onUpdate: self => {
        clearTimeout(resetSpeedTimeout);

        const velocity = gsap.utils.clamp(-10, 10, self.getVelocity() * 0.006);
        const speedFactor = 1 + Math.abs(velocity);

        timeline.timeScale(speedFactor);

        // After 150ms of no scroll update, reset speed back to normal (1) smoothly
        resetSpeedTimeout = setTimeout(() => {
          gsap.to(timeline, { timeScale: 1, duration: 0.5, ease: "power2.out" });
        }, 150);
      }
    });
  });