qsvpro.dathere.com/src/components/ScrollUpButton.jsx

import { useEffect, useState } from "react";

export const ScrollUpButton = () => {
    const [isVisible, setIsVisible] = useState(false);

    useEffect(() => {
        window.addEventListener("scroll", toggleVisible);
    }, []);

    const toggleVisible = () => {
        const scrolled = document.documentElement.scrollTop;
        if (scrolled > 300) {
            setIsVisible(true);
        } else if (scrolled <= 300) {
            setIsVisible(false);
        }
    };

    const scrollToTop = () => {
        window.scrollTo({
            top: 0,
            behavior: "smooth",
        });
    };

    return (
        <>
            {isVisible && (
                <div
                    className="w-12 h-12 fixed bottom-6 right-6 custom-border-gray rounded-xl  bg-customDarkBg2 hover:bg-customDarkBg3 cursor-pointer flex justify-center items-center transition z-50"
                    onClick={scrollToTop}
                >
                    <svg
                        fill="none"
                        xmlns="http://www.w3.org/2000/svg"
                        width="35px"
                        height="35px"
                        viewBox="0 0 20 20"
                    >
                        <path
                            d="M4.16732 12.5L10.0007 6.66667L15.834 12.5"
                            stroke="#007AFF"
                            strokeWidth="2"
                            strokeLinecap="round"
                            strokeLinejoin="round"
                        ></path>
                    </svg>
                </div>
            )}
        </>
    );
};