var headerInitOpacity = '0.3'; var headerStickyOpacity = '0.9'; var headerInitHeight = '80px'; var headerStickyHeight = '70px'; var headerHidingPoint = 40; // Scrolling point that triggers hiding the header (px) var prevScrollpos = window.pageYOffset; function handleScroll() { var currentScrollPos = window.pageYOffset; var navbar = document.getElementById("navbar"); // Determine the desired state of the navbar based on the current scroll position var desiredState = getDesiredNavbarState(currentScrollPos, navbar.style.top); if (desiredState.needsUpdate) { // Temporarily remove the event listener to prevent multiple triggers window.removeEventListener('scroll', handleScroll); // Apply the desired navbar state navbar.style.top = desiredState.top; navbar.style.background = desiredState.background; navbar.style.minHeight = desiredState.minHeight; console.log(desiredState.logMessage); // Logging the action taken // Re-add the event listener after a delay setTimeout(function() { window.addEventListener('scroll', handleScroll); }, 50); // 100ms delay } prevScrollpos = currentScrollPos; } function getDesiredNavbarState(currentScrollPos, currentTop) { if (prevScrollpos > currentScrollPos && currentScrollPos > headerHidingPoint) { if (currentTop != "0px") { return { needsUpdate: true, top: "0", background: "rgba(255, 255, 255, " + headerStickyOpacity + ")", minHeight: headerStickyHeight, logMessage: 'Sticking header' }; } } else if (currentScrollPos <= headerHidingPoint) { if (currentTop == "0px") { return { needsUpdate: true, top: "0", background: "rgba(255, 255, 255, " + headerInitOpacity + ")", minHeight: headerInitHeight, logMessage: 'Top header' }; } } else if (currentTop != "-100px") { return { needsUpdate: true, top: "-100px", background: "", minHeight: "", logMessage: 'Hiding header' }; } return { needsUpdate: false }; // No update needed } // Initially attach the scroll event listener window.addEventListener('scroll', handleScroll);