Adding skills

skills/develop/frontend-design/assets/vanilla-starter/script.js

@@ -0,0 +1,13 @@
+const observer = new IntersectionObserver(
+  entries => {
+    entries.forEach(entry => {
+      if (entry.isIntersecting) {
+        entry.target.classList.add('visible');
+        observer.unobserve(entry.target);
+      }
+    });
+  },
+  { threshold: 0.2 }
+);
+
+document.querySelectorAll('.reveal').forEach(el => observer.observe(el));