32 lines
690 B
TypeScript
32 lines
690 B
TypeScript
import { useEffect, useRef, useState } from 'react';
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export const useIntersectionObserver = <T extends HTMLElement>() => {
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const [isVisible, setIsVisible] = useState(false);
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const sectionRef = useRef<T>(null);
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useEffect(() => {
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const observer = new IntersectionObserver(
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(entries) => {
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const [entry] = entries;
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if (entry.isIntersecting) {
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setIsVisible(true);
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observer.disconnect();
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}
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},
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{
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threshold: 0.1,
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},
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);
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if (sectionRef.current) {
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observer.observe(sectionRef.current);
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}
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return () => {
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observer.disconnect();
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};
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}, []);
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return { sectionRef, isVisible };
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};
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