IntersectionObserver 可以轻松判断元素是否可见,在之前的 精读《用 React 做按需渲染》 中介绍了原生 API 的方法,这次刚好看到其 React 封装版本 react-intersection-observer,让我们看一看 React 封装思路。 2 简介 react-intersection-observer 提供了 Hook useInView
If you need it, you can also access theIntersectionObserverEntryonentry, giving you access to all the details about the current intersection state. import{InView}from"react-intersection-observer";constComponent=()=>(<InView>{({inView,ref,entry})=>({`Header inside viewport${inView}.`})...
ref = React.createRef(); } 1.一开始先定义好intersection-observer componentDidMount() { // IntersectionObserver polyfill 文档添加 IntersectionObserver.prototype.USE_MUTATION_OBSERVER = false; const node = this.ref.current; this.observer = new IntersectionObserver((entries, observer) => { entries.forE...
1 引言 IntersectionObserver 可以轻松判断元素是否可见,在之前的 精读《用 React 做按需渲染》 中介绍了原生 API 的方法,这次刚好看到其 React 封装版本 react-intersection-observer,让我们看一看 React 封装…
react-intersection-observer 用法react-intersection-observer 是一个 React Hook,它提供了 useInView 判断元素是否在可视区域内。 API 如下: import React from "react"; import { useInView } from "react-intersection-observer"; const Component = () => { const [ref, inView] = useInView(); return...
IntersectionObserver可以轻松判断元素是否可见,在之前的精读《用 React 做按需渲染》中介绍了原生 API 的方法,这次刚好看到其 React 封装版本react-intersection-observer,让我们看一看 React 封装思路。 2 简介 react-intersection-observer提供了 HookuseInView判断元素是否在可视区域内,API 如下: ...
npm install react-intersection-observer --save Usage useInViewhook // Use object destructuring, so you don't need to remember the exact orderconst{ref,inView,entry}=useInView(options);// Or array destructuring, making it easy to customize the field namesconst[ref,inView,entry]=useInView(...
npm install --save @researchgate/react-intersection-observer ⚠️Please make sure you have the minimum node version installed(as definedin the package.json) Otherwise you run into this build error: The engine "node" is incompatible with this module. Expected version ">=10.18.1". Got "10.15...
1 简介 react-intersection-observer 提供了 HookuseInView判断元素是否在可视区域内，API 如下：import...
importObserverfrom'@researchgate/react-intersection-observer'; 可用參數(Options) root: HTMLElement|string | default window viewport rootMargin: string | default 0px 0px 0px 0px threshold: number|Array | default: 0 disabled:boolean | default: false ...