Grace Fu: Environment Building on lockdown due to security situation

document.addEventListener("DOMContentLoaded", () => { const trigger = document.getElementById("ads-trigger"); if ('IntersectionObserver' in window && trigger) { const observer = new IntersectionObserver((entries, observer) => { entries.forEach(entry => { if (entry.isIntersecting) { lazyLoader(); // You should define lazyLoader() elsewhere or inline here observer.unobserve(entry.target); // Run once } }); }, { rootMargin: '800px', threshold: 0.1 }); observer.observe(trigger); } else { // Fallback setTimeout(lazyLoader, 3000); } });