scroll2078

navigation bar behavior based on scroll bar

Ekde 2024/04/01. Vidu La ĝisdata versio.

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greatest.deepsurf.us/scripts/491240/1352605/scroll2078.js

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document.addEventListener('DOMContentLoaded', function() {
    const header = document.querySelector('.header');
    let lastScrollTop = window.pageYOffset || document.documentElement.scrollTop;

    header.style.transform = 'translateY(-20px)';

    function handleScroll() {
        let scrollTop = window.pageYOffset || document.documentElement.scrollTop;
        let delta = scrollTop - lastScrollTop;

        if (scrollTop >= 0 && scrollTop <= 20) {
            let translateYValue = -20 + scrollTop;
            header.style.transform = `translateY(${translateYValue}px)`;
        } else if (scrollTop > 20) {
            // Ensure the header is fully visible if the scroll is beyond 20px
            header.style.transform = 'translateY(0px)';
        }

        lastScrollTop = scrollTop;
    }

    window.addEventListener('scroll', handleScroll);
});