Initialisieren

components/reveal.tsx

@@ -0,0 +1,64 @@
+"use client";
+
+import { useEffect, useRef, useState, type CSSProperties, type ReactNode } from "react";
+
+type RevealProps = {
+  children: ReactNode;
+  className?: string;
+  /** Verzögerung in Sekunden (für Stagger) */
+  delay?: number;
+  y?: number;
+};
+
+/**
+ * Leichte Scroll-Reveal-Variante ohne ScrollTrigger. IntersectionObserver
+ * verursacht keine fortlaufende Scroll-Arbeit und lädt keine GSAP-Plugins.
+ */
+export default function Reveal({
+  children,
+  className,
+  delay = 0,
+  y = 30,
+}: RevealProps) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [visible, setVisible] = useState(false);
+
+  useEffect(() => {
+    const element = ref.current;
+    if (!element) return;
+
+    const reducedMotion = window.matchMedia("(prefers-reduced-motion: reduce)");
+    if (reducedMotion.matches || !window.IntersectionObserver) {
+      const frame = window.requestAnimationFrame(() => setVisible(true));
+      return () => window.cancelAnimationFrame(frame);
+    }
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) {
+          setVisible(true);
+          observer.disconnect();
+        }
+      },
+      { rootMargin: "0px 0px -12%" },
+    );
+
+    observer.observe(element);
+    return () => observer.disconnect();
+  }, []);
+
+  return (
+    <div
+      ref={ref}
+      className={`reveal${visible ? " reveal--visible" : ""}${className ? ` ${className}` : ""}`}
+      style={
+        {
+          "--reveal-delay": `${delay}s`,
+          "--reveal-y": `${y}px`,
+        } as CSSProperties
+      }
+    >
+      {children}
+    </div>
+  );
+}