Function handleScroll

docs/javascripts/header-scroll.js:24–45

* Handle scroll events with debouncing

()

   * Handle scroll events with debouncing
   */
  function handleScroll() {
    if (scrollTimer) {
      clearTimeout(scrollTimer);
    }

    scrollTimer = setTimeout(() => {
      const currentScrollTop = window.pageYOffset || document.documentElement.scrollTop;

      // Determine scroll direction and position
      const isScrollingDown = currentScrollTop > lastScrollTop;
      const hasScrolledPastThreshold = currentScrollTop > SCROLL_THRESHOLD;

      // Add or remove scrolled class based on scroll position and direction
      if (hasScrolledPastThreshold && isScrollingDown) {
        header.classList.add('md-header--scrolled');
      } else if (currentScrollTop <= SCROLL_THRESHOLD) {
        header.classList.remove('md-header--scrolled');
      }

      lastScrollTop = currentScrollTop;
    }, SCROLL_DEBOUNCE);
  }

  /**
   * Initialize scroll behavior