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CSS

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JavaScript

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HTML 

              
                <div id="root"></div>
!

CSS 

              
                body {
  height: 100vh;
  width: 100vw;
  overflow-x: hidden;
  margin: 0;
  display: grid;
  place-items: center;
}
#scroll {
  position: absolute;
  top: 5%;
  left: 45%;
}
#button {
  background-color: blue;
  display: block;
  width: fit-content;
  color: #fff;
}
.div_max_content {
  width: max-content;
  img {
    height: 70vh;
  }
}
.modal_wrapper {
  width: 100%;
  overflow-x: hidden;
  heigth: auto;
}
.space {
  width: 100%;
  height: 100vh;
}
.photo_session_wrapper {
  display: flex;
  flex-direction: row;
  overflow-y: scroll;
  -ms-overflow-style: none;
  scrollbar-width: none;
  overflow-x: hidden;
}
!

JS 

              
                import React, {
  useRef,
  useEffect,
  useState
} from "https://cdn.skypack.dev/[email protected]";
import ReactDOM from "https://cdn.skypack.dev/[email protected]";
import reactModal from "https://cdn.skypack.dev/react-modal";
import Modal from "https://cdn.skypack.dev/react-modal";
import reactIntersectionObserver from "https://cdn.skypack.dev/react-intersection-observer";
import { useInView } from "https://cdn.skypack.dev/react-intersection-observer";

const App = () => {
  const [modalIsOpen, setIsOpen] = useState(false);

  function openModal() {
    setIsOpen(true);
  }

  function closeModal() {
    setIsOpen(false);
  }

  const scrollContainer = document.querySelector("#Image-gallery");

  const [ref, isVisible] = useInView({
    threshold: 0.5
  });

  useEffect(() => {
    if (isVisible) {
      console.log("visible");
      scrollContainer.addEventListener("wheel", (evt) => {
        evt.preventDefault();
        scrollContainer.scrollLeft += evt.deltaY;
      });
    } else {
      console.log("not visible");
    }
  }, [isVisible]);

  return (
    <>
      <div onClick={openModal} id="button">
        open modal
      </div>

      {modalIsOpen && (
        <Modal isOpen={modalIsOpen}>
          <div className="modal_wrapper">
            <div onClick={closeModal} id="button">
              Close modal
            </div>
            <div id="scroll">scroll down</div>
            <div className="space"></div>
            <section
              id="Image-gallery"
              ref={ref}
              className="photo_session_wrapper"
            >
              <div className="pin_wraper">
                <div className="animation-wrap to-right">
                  <div className="div_max_content">
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1526512340740-9217d0159da9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8MXx8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                    <img src="https://images.unsplash.com/photo-1544376798-89aa6b82c6cd?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8M3x8dmVydGljYWx8ZW58MHx8MHx8&auto=format&fit=crop&w=500&q=60" />
                  </div>
                </div>
              </div>
            </section>
            <div className="space"></div>
          </div>
        </Modal>
      )}
    </>
  );
};

ReactDOM.render(<App />, document.getElementById("root"));
!
999px

Console