Pin & Zoom Images On Scroll Using GSAP

A tiny JavaScript snippet that pins and zooms images while scrolling. Based on the GSAP Animation library and its ScrollTrigger plugin.

How to use it:

1. Add your images to the pinned-image container.

<div class="pinned-image">
  <div class="pinned-image__container">
    <img src='1.jpg' alt='Image 1'>
    <div class="pinned-image__container-overlay"></div>
  </div>
  <div class="pinned-image__overlay"></div>
</div>
<div class="pinned-image">
  <div class="pinned-image__container">
    <img src='2.jpg' alt='Image 2'>
    <div class="pinned-image__container-overlay"></div>
  </div>
  <div class="pinned-image__overlay"></div>
</div>
...

2. The necessary CSS styles for the pinned image.

.pinned-image {
  color: white;
  display: flex;
  height: 100vh;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.pinned-image__container {
  padding-top: 58%;
  position: relative;
  transform: scale(0.75);
  width: 100%;
}
.pinned-image__container-overlay {
  background: rgba(0, 0, 0, 0.6);
  bottom: 0;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}
.pinned-image__container-overlay--gradient {
  background: rgba(206, 112, 222, 0.7);
  background: linear-gradient(90deg, #ce70de 0%, rgba(255, 98, 141, 0.7) 100%);
}
.pinned-image__container img {
  height: 100%;
  left: 0;
  object-fit: cover;
  object-position: center;
  position: absolute;
  top: 0;
  width: 100%;
}

3. Load the necessary GSAP library in the document.

<script src="https://unpkg.co/gsap@3/dist/gsap.min.js"></script>
<script src="https://unpkg.com/gsap@3/dist/ScrollTrigger.min.js"></script>

4. The main JavaScript to activate the image pin & zoom animations.

const pinnedImages = document.querySelectorAll('.pinned-image');
pinnedImages.forEach(pinnedImage => {
  const container = pinnedImage.querySelector('.pinned-image__container');
  const image = container.querySelector('img');
  const overlay = container.querySelector('.pinned-image__container-overlay');
  const tl = gsap.timeline({paused: true});
  tl.to(container, {
    scale: 1.1,
  }, 0);
  tl.from(overlay, {
    autoAlpha: 0,
  }, 0);
  const trigger = ScrollTrigger.create({
    animation: tl,
    trigger: pinnedImage,
    start: "top top",
    markers: false,
    pin: true,
    scrub: true,
  });
});