54 lines
1.4 KiB
TypeScript
54 lines
1.4 KiB
TypeScript
'use client';
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import { useEffect, useRef, useState } from 'react';
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interface Props {
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children: React.ReactNode;
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/** 등장 지연(ms) — 연속 항목 스태거용 */
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delay?: number;
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/** 'fade-up'(기본) | 'fade' | 'draw'(선 그리기용 — width 확장) */
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variant?: 'fade-up' | 'fade' | 'draw';
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className?: string;
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}
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export default function ScrollReveal({ children, delay = 0, variant = 'fade-up', className }: Props) {
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const ref = useRef<HTMLDivElement>(null);
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const [shown, setShown] = useState(false);
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useEffect(() => {
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// reduced-motion: 즉시 표시 (연출 생략)
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if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) {
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setShown(true);
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return;
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}
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const el = ref.current;
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if (!el) return;
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const io = new IntersectionObserver(
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(entries) => {
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if (entries[0].isIntersecting) {
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setShown(true);
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io.disconnect();
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}
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},
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{ threshold: 0.2 },
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);
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io.observe(el);
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return () => io.disconnect();
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}, []);
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const hidden =
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variant === 'fade' ? 'opacity-0' :
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variant === 'draw' ? 'opacity-0 [transform:scaleX(0)] origin-left' :
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'opacity-0 translate-y-6';
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return (
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<div
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ref={ref}
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className={`${className ?? ''} transition-all duration-700 ease-out ${shown ? 'opacity-100 translate-y-0 [transform:none]' : hidden}`}
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style={{ transitionDelay: `${delay}ms` }}
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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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