function handleScroll() {
var currentY = window.pageYOffset || document.documentElement.scrollTop || 0;
if (currentY <= threshold) {
clearHeaderNavy();
} else if (currentY < lastY) {
makeHeaderNavy();
} else if (currentY > lastY) {
clearHeaderNavy();
}
lastY = currentY <= 0 ? 0 : currentY;
}
window.addEventListener("scroll", handleScroll, { passive: true });
window.addEventListener("resize", handleScroll);
document.addEventListener("DOMContentLoaded", handleScroll);
})();
