58 lines
1.4 KiB
TypeScript
58 lines
1.4 KiB
TypeScript
"use client";
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import { useEffect, useRef, useState, useCallback } from "react";
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interface UseScrollAnimationOptions {
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threshold?: number;
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rootMargin?: string;
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triggerOnce?: boolean;
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}
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export function useScrollAnimation<T extends HTMLElement = HTMLDivElement>(
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options: UseScrollAnimationOptions = {},
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) {
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const { threshold = 0.1, rootMargin = "0px", triggerOnce = true } = options;
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const ref = useRef<T>(null);
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const [isVisible, setIsVisible] = useState(false);
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const [hasTriggered, setHasTriggered] = useState(false);
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useEffect(() => {
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if (typeof window === "undefined") return; // extra safety
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const element = ref.current;
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if (!element) return;
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const observer = new IntersectionObserver(
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([entry]) => {
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if (entry.isIntersecting) {
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setIsVisible(true);
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if (triggerOnce) {
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setHasTriggered(true);
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observer.unobserve(element);
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}
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} else if (!triggerOnce) {
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setIsVisible(false);
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}
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},
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{ threshold, rootMargin },
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);
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observer.observe(element);
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return () => observer.disconnect();
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}, [threshold, rootMargin, triggerOnce]);
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const reset = useCallback(() => {
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setIsVisible(false);
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setHasTriggered(false);
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}, []);
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return {
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ref,
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isVisible: triggerOnce ? isVisible || hasTriggered : isVisible,
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reset,
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};
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}
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