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apps/spa/src/hooks/useScrollReveal.ts

@@ -0,0 +1,37 @@
+import { useEffect, useRef, useState } from 'react';
+
+interface UseScrollRevealOptions {
+  threshold?: number;
+  rootMargin?: string;
+  once?: boolean;
+}
+
+export function useScrollReveal<T extends HTMLElement = HTMLDivElement>(
+  options: UseScrollRevealOptions = {}
+) {
+  const { threshold = 0.1, rootMargin = '0px 0px -60px 0px', once = true } = options;
+  const ref = useRef<T>(null);
+  const [isVisible, setIsVisible] = useState(false);
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el) return;
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) {
+          setIsVisible(true);
+          if (once) observer.disconnect();
+        } else if (!once) {
+          setIsVisible(false);
+        }
+      },
+      { threshold, rootMargin }
+    );
+
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [threshold, rootMargin, once]);
+
+  return { ref, isVisible };
+}