Stirling-PDF/src/main/resources/static/js/multitool/horizontalScroll.js

const scrollDivHorizontally = (id) => {
    var scrollDelta = 0; // variable to store the accumulated scroll delta
    var isScrolling = false; // variable to track if scroll is already in progress
    const pagesContainerWrapper = document.getElementById(id);
    function scrollLoop() {
        // Scroll the div horizontally by a fraction of the accumulated scroll delta
        pagesContainerWrapper.scrollLeft += scrollDelta * 0.1;

        // Reduce the accumulated scroll delta by a fraction
        scrollDelta *= 0.9;

        // If scroll delta is still significant, continue the scroll loop
        if (Math.abs(scrollDelta) > 0.1) {
            requestAnimationFrame(scrollLoop);
        } else {
            isScrolling = false; // Reset scroll in progress flag
        }
    }

    const divToScrollHorizontally = document.getElementById(id)
    divToScrollHorizontally.addEventListener("wheel", function(e) {
        e.preventDefault(); // prevent default mousewheel behavior

        // Accumulate the horizontal scroll delta
        scrollDelta -= e.deltaX || e.wheelDeltaX || -e.deltaY || -e.wheelDeltaY;

        // If scroll is not already in progress, start the scroll loop
        if (!isScrolling) {
            isScrolling = true;
            requestAnimationFrame(scrollLoop);
        }
    });
}

export default scrollDivHorizontally;