如下案例中的 useSorted 函数就没有调用任何 Hook 方法,所以更推荐用 getSorted 来命名: // 🔴 Avoid: 没有调用其他Hook的Hook function useSorted(items) { return items.slice().sort(); } // ✅ Good: 没有使用Hook的常规函数 function getSorted(items)
React customHook是一种自定义的React Hook,用于在函数组件中共享逻辑和状态。它可以帮助开发者将可复用的逻辑封装成自定义的Hook函数,以便在多个组件中共享和重用。 React customHook的优势在于可以提高代码的可维护性和复用性。通过将逻辑封装成自定义的Hook函数,可以将组件中的业务逻辑与UI分离,使代码更加清晰...
Here, we use theuseStateHook to provide us state. We’re storing multiple values inside of this state, so we name the first variablestate,and the second variablesetState. <MusicPlayerContext.Providervalue={[state,setState]}>{props.children}</MusicPlayerContext.Provider> Finally, here we put ...
AI代码解释 importReact,{useEffect,useState}from'react';functionuseAddListener(name){useEffect(()=>{console.log(name,' - 组件被挂载或者更新完成 -- 添加监听');return()=>{console.log(name,' - 组件即将被卸载 -- 移除监听');}});}functionHome(){useAddListener('Home');return(Home)}functionAbou...
[debouncedParam]);// 初始化usersuseMount(() =>{client('users').then(setUsers);})return (<SearchPanel users={users}param={param}setParam={setParam}/>{error?<Typography.Texttype="danger">{error.message}</Typography.Text>:null}<Listloading={isLoading}users={users}dataSource={list||[]}/...
return isOnline; } 现在让我们看看应该如何使用自定义 Hook。# 使用自定义 Hook我们一开始的目标是在 FriendStatus 和FriendListItem 组件中去除重复的逻辑,即:这两个组件都想知道好友是否在线。现在我们已经把这个逻辑提取到 useFriendStatus 的自定义 Hook 中,然后就可以使用它了:function...
const {name}=props;return( hello world {name} ); } exportdefaultApp; 除此之外,函数类型还可以使用React.FunctionComponent<P={}>来定义,也可以使用其简写React.FC<P={}>,两者效果是一样的。它是一个泛型接口,可以接收一个参数,参数表示props的类型,这个参数不是必须的。它们就相当于这样: type React....
import React, { useState } from 'react'; import { useAsync } from '@custom-react-hooks/all'; const fetchData = async (endpoint) => { const response = await fetch(endpoint); if (!response.ok) { throw new Error(`Failed to fetch from ${endpoint}`); } return response.json(); };...
Using custom hooks is a great method to increase the reusability, maintainability and testability of your React code. Frequently Asked Questions What are React Hooks? React hooks are functions that let you use state and other React features in functional components. They are a new feature in Reac...
useState is the first hook we use now. What does it do? it accept the initial state (value or function), and return an array, first is the value, second is the set function like setRepos. The set function will trigger React to re-render when it was invoked. The difference between ...