tag or in Webflow's custom code section document.addEventListener('DOMContentLoaded', function() { // Get elements const trigger = document.getElementById('nav-animation-trigger'); const signInBtn = document.querySelector('[data-nav-btn="signin"]'); const bookDemoBtn = document.querySelector('[data-nav-btn="demo"]'); let lastScrollY = window.scrollY; let isTransitioning = false; // Check if element is visible in viewport function isElementVisible(element) { if (!element) return false; const rect = element.getBoundingClientRect(); return rect.top < window.innerHeight && rect.bottom > 0; } // Smooth transition between buttons function switchButtons(showSignIn) { if (isTransitioning) return; isTransitioning = true; const activeBtn = showSignIn ? signInBtn : bookDemoBtn; const inactiveBtn = showSignIn ? bookDemoBtn : signInBtn; // Only transition if the states are different if (activeBtn.style.opacity === '1' || activeBtn.style.opacity === '') { isTransitioning = false; return; } // Ensure buttons have transition CSS [signInBtn, bookDemoBtn].forEach(btn => { if (btn) { btn.style.transition = 'opacity 0.3s ease-in-out'; btn.style.pointerEvents = 'auto'; } }); // Fade out inactive button if (inactiveBtn) { inactiveBtn.style.opacity = '0'; inactiveBtn.style.pointerEvents = 'none'; } // Fade in active button setTimeout(() => { if (activeBtn) { activeBtn.style.opacity = '1'; activeBtn.style.pointerEvents = 'auto'; } isTransitioning = false; }, 50); } // Initial state on page load function setInitialState() { if (!trigger || !signInBtn || !bookDemoBtn) { console.warn('Missing required elements. Make sure you have:'); console.warn('- Element with id "nav-animation-trigger"'); console.warn('- Button with data-nav-btn="signin"'); console.warn('- Button with data-nav-btn="demo"'); return; } // Disable transitions for initial state (immediate change) [signInBtn, bookDemoBtn].forEach(btn => { if (btn) { btn.style.transition = 'none'; } }); const triggerVisible = isElementVisible(trigger); if (triggerVisible) { // Show Sign In immediately signInBtn.style.opacity = '1'; signInBtn.style.pointerEvents = 'auto'; bookDemoBtn.style.opacity = '0'; bookDemoBtn.style.pointerEvents = 'none'; } else { // Show Book a Demo immediately signInBtn.style.opacity = '0'; signInBtn.style.pointerEvents = 'none'; bookDemoBtn.style.opacity = '1'; bookDemoBtn.style.pointerEvents = 'auto'; } // Re-enable transitions after initial state is set setTimeout(() => { [signInBtn, bookDemoBtn].forEach(btn => { if (btn) { btn.style.transition = 'opacity 0.3s ease-in-out'; } }); }, 50); } // Scroll handler function handleScroll() { if (!trigger) return; const currentScrollY = window.scrollY; const triggerVisible = isElementVisible(trigger); const scrollingDown = currentScrollY > lastScrollY; if (scrollingDown && !triggerVisible) { // Scrolling down and past trigger - show Book a Demo switchButtons(false); } else if (!scrollingDown && triggerVisible) { // Scrolling up and trigger is visible - show Sign In switchButtons(true); } lastScrollY = currentScrollY; } // Throttle scroll events for better performance let scrollTimeout; function throttledScroll() { if (scrollTimeout) return; scrollTimeout = setTimeout(() => { handleScroll(); scrollTimeout = null; }, 16); // ~60fps } // Initialize setInitialState(); // Listen for scroll events window.addEventListener('scroll', throttledScroll, { passive: true }); // Optional: Re-check on window resize window.addEventListener('resize', setInitialState); });