useDebugValue 是一个 React Hook,用于在 React DevTools 中为自定义 Hook 添加标签。它可以帮助我们在开发过程中更好地调试和理解自定义 Hook 的状态。 1.1 基本语法 useDebugValue(value, formatFn?) 1. value: 要在 DevTools 中显示的值 formatFn: (可选) 格式化函数,用于对显示值进行格式化 2. 基础用法 ...
React Hooks Hook 是 React 16.8 的新增特性,可以让你在函数组件中使用 state 以及其他的 React 特性。 从概念上讲,React 组件一直更像是函数。而 Hook 则拥抱了函数,同时也没有牺牲 React 的精神原则。 优点 代码可读性更强,原本的写法同一块功能的代码逻辑被拆分在了不同的生命周期函数中,不利于维护和...
npm install @custom-react-hooks/all or yarn add @custom-react-hooks/all Importing the Hook TheuseAsynchook must be imported using a named import as shown below: Named Import: import{useAsync}from'@custom-react-hooks/use-async'; This approach ensures that the hook integrates seamlessly into ...
它规定只有在两个地方能够使用 React Hook: React 函数组件 自定义 Hook 第一点我们早就清楚了,第二点通过刚才的两个动画相信你也明白了:自定义 Hook 本质上只是把调用内置 Hook 的过程封装成一个个可以复用的函数,并不影响 Hook 链表的生成和读取。 实战环节 让我们继续 COVID-19 数据应用的开发。接下来,我...
yarn add @custom-react-hooks/all Importing the Hook TheuseLongPresshook must be imported using a named import as shown below: Named Import: import{useLongPress}from'@custom-react-hooks/use-long-press'; This approach ensures that the hook integrates seamlessly into your project, maintaining consist...
Using a Custom React Hook to Manage Context Create a new file calleduseMusicPlayer.js.Because this is a custom React Hook, we use‘use’before the name of the Hook. If you want to learn how custom React Hooks can make your components much leaner, check out my tutorial onSimplifying Forms...
useRef()返回一个具有current属性的对象,称为ref对象。把对象赋值给原生的React Element元素的ref属性,就能获取到对应的真实的DOM元素。 import React, { useRef } from "react"; const CustomTextInput= () =>{ const textInput= useRef();//创建ref对象const focusTextInput = () => textInput.current.focus...
Start Learning React from scratch watch our React JS Full Course: What is the useReducer Hook? React `useReducer()` hook is a powerful tool for managing states in a more structured and predictable manner. Reducer in React is particularly useful when dealing with complex state logic that involves...
For some more custom hook inspiration, I recommend checking outreact-use. Non-reusable custom hooks to extract functionality Just like with components, sometimes it can be useful to create a custom hook even if it isn’t reusable as a way to extract functionality to make the parent component ...
Even though it's not a hook at all (it doesn't use any React hooks like useState), it should work fine in normal situations. window.confirm() will block the browser's thread and freeze UI updates. Advanced version — with Promise ...