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Harri

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Harri

Lemke

Image to Background (Zoom)

Documentation

Webflow

Code

Setup: External Scripts

HTML

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<script src="https://cdn.jsdelivr.net/npm/gsap@3.15/dist/gsap.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.15/dist/Flip.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.15/dist/ScrollTrigger.min.js"></script>

Step 1: Add HTML

HTML

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<section data-bg-zoom-init="" class="background-zoom">
  <div class="background-zoom__title">
    <h1 class="background-zoom__h">Image to Background<span class="background-zoom__h1-span"> (Zoom)</span></h1>
  </div>
  <div data-bg-zoom-start="" class="background-zoom__start">
    <div data-bg-zoom-content="" class="background-zoom__content">
      <img width="1440" data-bg-zoom-img="" alt="Futuristic Pod Vehicle name Podrick" src="https://cdn.prod.website-files.com/6943c8b7a3a82b904e7497bd/6943c8e062a0c0a68d04e6c1_futuristic-pod-vehicle.avif" loading="lazy" class="background-zoom__img">
      <p class="background-zoom__pod">PØDRICK</p>
      <div class="background-zoom__play">
        <svg xmlns="http://www.w3.org/2000/svg" width="100%" viewbox="0 0 66 66" fill="none" class="background-zoom__play-svg"><circle cx="33" cy="33" r="33" fill="#F4F4F4"></circle><path d="M25.5 33V26.0785C25.5 24.1544 27.5826 22.9515 29.2493 23.9131L35.25 27.375L41.2465 30.8345C42.9141 31.7966 42.9141 34.2034 41.2465 35.1655L35.25 38.625L29.2493 42.0869C27.5826 43.0485 25.5 41.8456 25.5 39.9215V33Z" fill="#201D1D"></path></svg>
      </div>
      <div data-bg-zoom-dark="" class="background-zoom__dark"></div>
    </div>
  </div>
  <div data-bg-zoom-end="" class="background-zoom__end"></div>
  <div class="background-zoom__text">
    <h2 class="background-zoom__h">This is the after phase of the <br><span class="background-zoom__h1-span">(Zoom)</span></h2>
    <h2 class="background-zoom__h is--margin-top">more...</h2>
    <h2 class="background-zoom__h is--margin-top">and more!</h2>
  </div>
</section>
<section class="background-zoom-after">
  <p class="background-zoom-after__pod">PØDRICK</p>
  <h2 class="background-zoom__h">And we reached the end!</h2>
</section>

Step 2: Add CSS

CSS

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.background-zoom {
  color: #f4f4f4;
  background-color: #353d35;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  min-height: 100svh;
  padding-top: calc(50dvh - 15em);
  padding-left: 1em;
  padding-right: 1em;
  display: flex;
  overflow: clip;
}

.background-zoom__h {
  text-align: center;
  letter-spacing: -.04em;
  max-width: 7em;
  margin-top: 0;
  margin-bottom: -.375em;
  font-family: Haffer XH, Arial, sans-serif;
  font-size: 7.5em;
  font-weight: 400;
  line-height: .95;
}

.background-zoom__h.is--margin-top {
  margin-top: 33dvh;
}

.background-zoom__h1-span {
  color: #aba994;
}

.background-zoom__start {
  aspect-ratio: 1;
  border-radius: 16em;
  width: 16em;
  position: relative;
}

.background-zoom__content {
  border-radius: inherit;
  will-change: width, height, transform;
  background-color: #aba994;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0%;
  left: 0%;
  overflow: hidden;
}

.background-zoom__img {
  object-fit: cover;
  width: 100%;
  height: 100%;
  position: absolute;
}

.background-zoom__pod {
  color: #ff4800;
  text-align: center;
  letter-spacing: -.02em;
  width: 100%;
  font-size: 1.25em;
  font-weight: 900;
  line-height: 1;
  position: absolute;
  top: 1.25em;
}

.background-zoom__play {
  width: 4em;
  height: 4em;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.background-zoom__play-svg {
  width: 100%;
}

.background-zoom__dark {
  opacity: 0;
  background-color: #0d0f0d;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.background-zoom__end {
  width: 100vw;
  height: 100dvh;
}

.background-zoom__text {
  grid-column-gap: 2em;
  grid-row-gap: 2em;
  flex-flow: column;
  align-items: center;
  width: 100%;
  padding-bottom: calc(50dvh - 12em);
  display: flex;
  position: relative;
}

.background-zoom-after {
  color: #353d35;
  font-size: var(--size-font);
  background-color: #f4f4f4;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 100dvh;
  padding-left: 1em;
  padding-right: 1em;
  display: flex;
  position: relative;
}

.background-zoom-after__pod {
  color: #ff4800;
  text-align: center;
  letter-spacing: -.02em;
  width: 100%;
  font-size: 1.25em;
  font-weight: 900;
  line-height: 1;
  position: absolute;
  bottom: 1.25em;
}

@media screen and (max-width: 767px) {
  .background-zoom__h {
    font-size: 3.75em;
  }
}

Step 2: Add Javascript

Step 3: Add Javascript

Javascript

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gsap.registerPlugin(ScrollTrigger, Flip);

function initBackgroundZoom() {
  const containers = document.querySelectorAll("[data-bg-zoom-init]");
  if (!containers.length) return;

  let masterTimeline;

  const getScrollRange = ({ trigger, start, endTrigger, end }) => {
    const st = ScrollTrigger.create({ trigger, start, endTrigger, end });
    const range = Math.max(1, st.end - st.start);
    st.kill();
    return range;
  };

  const bgZoomTimeline = () => {
    if (masterTimeline) masterTimeline.kill();

    masterTimeline = gsap.timeline({
      defaults: { ease: "none" },
      scrollTrigger: {
        trigger: containers[0].querySelector("[data-bg-zoom-start]") || containers[0],
        start: "clamp(top bottom)", // Change to "center center" to start from center of [data-bg-zoom-start]
        endTrigger: containers[containers.length - 1],
        end: "bottom top",
        scrub: true,
        invalidateOnRefresh: true
      }
    });

    containers.forEach((container) => {
      const startEl = container.querySelector("[data-bg-zoom-start]");
      const endEl = container.querySelector("[data-bg-zoom-end]");
      const contentEl = container.querySelector("[data-bg-zoom-content]");
      const darkEl = container.querySelector("[data-bg-zoom-dark]");
      const imgEl = container.querySelector("[data-bg-zoom-img]");
      if (!startEl || !endEl || !contentEl) return;

      const startRadius = getComputedStyle(startEl).borderRadius;
      const endRadius = getComputedStyle(endEl).borderRadius;
      const hasRadius = startRadius !== "0px" || endRadius !== "0px";
      contentEl.style.overflow = hasRadius ? "hidden" : "";
      if (hasRadius) gsap.set(contentEl, { borderRadius: startRadius });

      Flip.fit(contentEl, startEl, { scale: false });

      // Part 1 - Move from Start to End position
      const zoomScrollRange = getScrollRange({
        trigger: startEl,
        start: "clamp(top bottom)", // Change to "center center" to start from center of [data-bg-zoom-start]
        endTrigger: endEl,
        end: "center center"
      });
      
      // Part 2 - End position to out of view
      const afterScrollRange = getScrollRange({
        trigger: endEl,
        start: "center center",
        endTrigger: container,
        end: "bottom top"
      });
      
      // Master Timeline
      masterTimeline.add(
        Flip.fit(contentEl, endEl, {
          duration: zoomScrollRange,
          ease: "none",
          scale: false,
        })
      );

      // Border Radius  
      if (hasRadius) {
        masterTimeline.to(contentEl, { 
            borderRadius: endRadius, 
            duration: zoomScrollRange 
        }, "<");
      }
      
      // Content Y Position  
      masterTimeline.to(contentEl, {
        y: `+=${afterScrollRange}`,
        duration: afterScrollRange
      });
      
       // Dark Overlay
      if (darkEl) {
        gsap.set(darkEl, { opacity: 0 });
        masterTimeline.to(darkEl, { 
          opacity: 0.75, 
          duration: afterScrollRange * 0.25,
        }, "<");
      }

      // Image scale
      if (imgEl) {
        gsap.set(imgEl, { scale: 1, transformOrigin: "50% 50%" });
        masterTimeline.to(imgEl, { 
          scale: 1.25, 
          yPercent: -10,
          duration: afterScrollRange 
        }, "<");
      }
    });

    ScrollTrigger.refresh();
  };

  bgZoomTimeline();

  let resizeTimer;
  window.addEventListener("resize", () => {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(bgZoomTimeline, 100);
  });
}

// Initialize Image to Background (Zoom)
document.addEventListener('DOMContentLoaded', function() {
  initBackgroundZoom();
});

Implementation

This script uses GSAP together with the Flip and ScrollTrigger plugins to create a smooth scroll-based zoom effect. Flip handles the layout transition between the start and end elements, while ScrollTrigger links the animation progress directly to scroll position so everything stays in sync.

Container

Use [data-bg-zoom-init] to define a single background zoom section that participates in the scroll-driven zoom sequence.

Start

Use [data-bg-zoom-start] as the initial visual state that the content element matches before the zoom animation begins.

End

Use [data-bg-zoom-end] as the final visual state that the content element transitions into during the zoom phase.

Content

Use [data-bg-zoom-content] as the element that morphs in size and position from the start state to the end state using Flip.

Dark overlay

Use [data-bg-zoom-dark] to fade in a dark overlay after the zoom has completed while the section scrolls out of view.

Image

Use [data-bg-zoom-img] to scale and slightly translate the image during the after phase once the zoom is finished.

Scroll start behavior

In the GSAP Timeline use start: "clamp(top bottom)" to begin the zoom as soon as the start element enters the viewport, or change it to start: "center center" to delay the zoom until the start element is centered (make sure to change it at both timelines).

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Resource details

  • Published

    January 5, 2026

  • Category

    Scroll Animations

  • Popularity

    2K visitors

  • Need help?

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Scrolling
Image
Scaling
Zoom
Progress
GSAP
Flip
Scrolltrigger
Background
Dennis SnellenbergDennis Snellenberg

Creator Credits

We always strive to credit creators as accurately as possible. While similar concepts might appear online, we aim to provide proper and respectful attribution.

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