WIP

dist/app.js

@@ -9,10 +9,18 @@
 
 var observer = new IntersectionObserver(function (entries) {
   entries.forEach(function (entry) {
+    var el = entry.target;
     if (entry.isIntersecting) {
-      entry.target._inViewportTimeout = setTimeout(function () {
-        entry.target.classList.add('visible');
-      }, 250);
+      if (!el._hasEnteredOnce) {
+        // First time in viewport – apply delay
+        el._inViewportTimeout = setTimeout(function () {
+          el.classList.add('in-viewport');
+          el._hasEnteredOnce = true;
+        }, 250);
+      } else {
+        // Already entered once – no delay
+        el.classList.add('in-viewport');
+      }
     } else {
       clearTimeout(entry.target._inViewportTimeout);
       entry.target.classList.remove('visible');