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