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HTML 

              
                <body class="body">
  <div class="greenline"></div>

  <div class="main-wrapper">

    <section class="section" style="background-color: red"></section>

    <section id="gather" class="section section--showcase">

      <div class="showcase">
        
        <div class="project a-project a-project-1" data-title="Data Title 1" data-meta="Data Meta 01">
          <div class="gallery a-gallery a-gallery-0">

            <div class="image a-image a-image-1" data-caption="Data Caption 1">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A2033-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-2" data-caption="Data Caption 2">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A7527-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-3" data-caption="Data Caption 3">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A7538-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-4" data-caption="Data Caption 4">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A8100-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-5" data-caption="Data Caption 5">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A8236-1024x683.jpg" style="height:100%" />
            </div>

          </div>

        </div>

        <div class="project a-project a-project-2" data-title="Data Title 2" data-meta="Data Meta 02">

          <div class="gallery a-gallery a-gallery-0">

            <div class="image a-image a-image-1" data-caption="Data Caption 6">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A8975-1-1024x1024.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-2" data-caption="Data Caption 7">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A8847-1024x1024.jpg" style="height:80%" />
            </div>

            <div class="image a-image a-image-3" data-caption="Data Caption 8">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A8863-2-1-1024x683.jpg" style="height:70%" />
            </div>

            <div class="image a-image a-image-4" data-caption="Data Caption 9">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/086A8890-1024x1024.jpg" style="height:90%" />
            </div>

          </div>

        </div>

        <div class="project a-project a-project-3" data-title="Data Title 3" data-meta="Data Meta 3">

          <div class="gallery a-gallery a-gallery-0">

            <div class="image a-image a-image-1" data-caption="Data Caption 10">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/Drew-Nocente-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-2" data-caption="Data Caption 11">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/Drew-Food-Workshop-1024x683.jpg" style="height:100%" />
            </div>

          </div>

        </div>

        <div class="project a-project a-project-4" data-title="Data Title 4" data-meta="Data Meta 4">

          <div class="gallery a-gallery a-gallery-0">

            <div class="image a-image a-image-1" data-caption="Data Caption 12">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/Maha-Co-1-1-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-2" data-caption="Data Caption 13">
              <img src="https://reroutefest.com/wp-content/uploads/2022/09/Maha-Co-2-1-1024x683.jpg" style="height:100%" />
            </div>

            <div class="image a-image a-image-3" data-caption="Data Caption 14">
              <img src="" style="height:100%" />
            </div>

          </div>

        </div>

        <div class="info-wrapper a-info-wrapper fixed-section">
          <div class="project-info a-project-info">
            <div class="work-title a-work-title rift"></div>
            <div class="meta-info a-meta-info"></div>
          </div>
          <div class="img-caption a-img-caption"></div>
        </div>

      </div>

    </section>

    <section class="section" style="background-color: purple;">
    </section>

  </div>
!

CSS 

              
                section,
.showcase {
  height: 100vh;
}
.showcase,
.gallery,
.image {
  display: flex;
  flex-wrap: nowrap;
  position: relative;
  align-items: center;
}
.image {
  height: 30vh;
}
.info-wrapper {
  position: absolute;
  left: 0;
  bottom: 5%;
  color: black;
}
.greenline {
  border: 1px solid green;
  height: 100vh;
  width: 1px;
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 50%;
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger);

// Dynamic image class names for sections
const aImages = gsap.utils.toArray(".a-image");
aImages.map((v, i) => {
  v.className = `image a-image a-image-${i + 1}`;
});

// Getting the elements for manipulation
const a_textSection = document.querySelector(".a-fixed-section");
const a_workTitle = document.querySelector(".a-work-title");
const a_metaInfo = document.querySelector(".a-meta-info");
const a_imgCaption = document.querySelector(".a-img-caption");
const a_projectSection = document.querySelector(".a-project");
const a_image = document.querySelector(".a-image");
const a_imageOne = document.querySelector(".a-image-1");
const a_galleryScroll = document.querySelector(".a-gallery");

// Setting arrays for dynamic animations
const a_gallery = gsap.utils.toArray(".a-gallery");
const a_sections = gsap.utils.toArray(".a-project");
const a_imgCaptionsArr = gsap.utils.toArray(".a-image");


let a_maxWidth = 0;

const a_getMaxWidth = () => {
  a_maxWidth = 0;
  a_sections.forEach((a_section) => {
    a_maxWidth += a_section.offsetWidth;
  });
};
a_getMaxWidth();
ScrollTrigger.addEventListener("refreshInit", a_getMaxWidth);

let horizontalTween = gsap.to(a_sections, {
  x: () => `-${a_maxWidth - window.innerWidth / 1.5}`,
  ease: "none",
  scrollTrigger: {
    trigger: ".section--showcase",
    pin: true,
    scrub: true,
    end: () => `+=${a_maxWidth}`,
    invalidateOnRefresh: true
  }
});


aImages.forEach((image, i) => {
  console.log('banana')
  ScrollTrigger.create({
    trigger: image,
    containerAnimation: horizontalTween,
    start: 'left center',
    end: 'right center',
    markers: true,
    onToggle: (self) => {
      if(self.isActive) {
         console.log(self.trigger.dataset.caption)
      }
    }
  })
})
!
999px

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