superset index 源码
superset index 代码
文件路径：/superset-frontend/src/hooks/useElementOnScreen/index.ts
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import { useEffect, useRef, useState, RefObject } from 'react';
export function useElementOnScreen<T extends Element>(
options: IntersectionObserverInit,
): [RefObject<T>, boolean] {
const containerRef = useRef<T>(null);
const [isSticky, setIsSticky] = useState(false);
const callback = (entries: IntersectionObserverEntry[]) => {
const [entry] = entries;
setIsSticky(entry.intersectionRatio < 1);
};
useEffect(() => {
const observer = new IntersectionObserver(callback, options);
const element = containerRef.current;
if (element) {
observer.observe(element);
}
return () => {
if (element) {
observer.unobserve(element);
}
};
}, [containerRef, options]);
return [containerRef, isSticky];
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦