55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
import { useEffect, useRef, useState, RefObject } from "react";
|
|
|
|
export interface UseInViewOptions {
|
|
threshold?: number;
|
|
rootMargin?: string;
|
|
triggerOnce?: boolean;
|
|
}
|
|
|
|
export interface UseInViewReturn<T extends HTMLElement> {
|
|
ref: RefObject<T>;
|
|
isInView: boolean;
|
|
}
|
|
|
|
/**
|
|
* Hook для определения когда элемент появляется в viewport
|
|
* @param options - настройки Intersection Observer
|
|
* @returns ref для элемента и статус видимости
|
|
*/
|
|
export function useInView<T extends HTMLElement = HTMLDivElement>(
|
|
options: UseInViewOptions = {}
|
|
): UseInViewReturn<T> {
|
|
const { threshold = 0.1, rootMargin = "0px", triggerOnce = true } = options;
|
|
const ref = useRef<T>(null);
|
|
const [isInView, setIsInView] = useState(false);
|
|
|
|
useEffect(() => {
|
|
const element = ref.current;
|
|
if (!element) return;
|
|
|
|
const observer = new IntersectionObserver(
|
|
([entry]) => {
|
|
const inView = entry.isIntersecting;
|
|
setIsInView(inView);
|
|
|
|
// Если triggerOnce, отключаем observer после первого срабатывания
|
|
if (inView && triggerOnce) {
|
|
observer.unobserve(element);
|
|
}
|
|
},
|
|
{
|
|
threshold,
|
|
rootMargin,
|
|
}
|
|
);
|
|
|
|
observer.observe(element);
|
|
|
|
return () => {
|
|
observer.disconnect();
|
|
};
|
|
}, [threshold, rootMargin, triggerOnce]);
|
|
|
|
return { ref, isInView };
|
|
}
|