add IntersectionObserver

html/poketube.ejs

@@ -1621,6 +1621,21 @@ if (/[?&]autoplay=/.test(location.search)) {
   }
 }
   
+const lazyElements = document.querySelectorAll('*');
+
+const observer = new IntersectionObserver((entries, observer) => {
+  entries.forEach(entry => {
+    if (entry.isIntersecting) {
+      entry.target.classList.add('loaded');
+      observer.unobserve(entry.target);
+    }
+  });
+});
+
+lazyElements.forEach(element => {
+  observer.observe(element);
+});
+  
 // Function to refresh the page
 const refreshPage = () => {
   location.reload();