react学习笔记-5：react路由

react旧版本路由

旧版本的路由是按照组件的方式来写的

编写router/index.tsx文件

import App from "../App"
import Home from "../views/Home"
import About from "../views/About"
import { BrowserRouter,Routes,Route } from "react-router-dom"
//两种路由模式的组件，BrowserRouter(history模式), HashRouter (Hash模式)

// const baseRouter = () => {
// 如果有逻辑，才需要写return，如果没有逻辑直接reture，可以使用下面的简写
//    return()
//}

const baseRouter = () => (
    
        
            }>
                }>
                }>
            
        
    
)

export  default baseRouter

修改main.tsx文件，引入router下的首页组件

import React from 'react'
import ReactDOM from 'react-dom/client'

//正确的样式引入顺序
//样式初始化一般放在最前面，引用reset-css
import "reset-css"

//UI框架的样式一般放在组件样式之前
//import XXXX

//全局样式
import "@/assets/styles/global.scss"

//组件的样式
//import App from './App'
import Router from "./router"

ReactDOM.createRoot(document.getElementById('root') as HTMLElement).render(
  
    
  ,
)

 修改App.tsx

import { useState } from 'react'
import Comp1 from "@/components/Comp1/index"
import Comp2 from "@/components/Comp2/index"
import { Button, Space } from 'antd';
import {PlayCircleOutlined} from '@ant-design/icons';
import {Outlet} from "react-router-dom"

function App() {
  const [count, setCount] = useState(0)

  return (
    

      我的React项目 
      
      
      我们的按钮
      Primary Button
      
      {/* 占位符组件，类似窗口，用来展示组件的，有点像vue中的router-view*/}
      
    
  )
}

路由链接

引入Link组件，并修改App.tsx文件

import { useState } from 'react'
import Comp1 from "@/components/Comp1/index"
import Comp2 from "@/components/Comp2/index"
import { Button, Space } from 'antd';
import {PlayCircleOutlined} from '@ant-design/icons';
import {Outlet, Link} from "react-router-dom"

function App() {
  const [count, setCount] = useState(0)

  return (
    

      我的React项目 
      Home
      About
      首页
      
      
      我们的按钮
      Primary Button
      
      {/* 占位符组件，类似窗口，用来展示组件的，有点像vue中的router-view*/}
      
    
  )
}

路由重定向

修改router/index.tsx文件，引入Navigate组件，并配置重定向

import App from "../App"
import Home from "../views/Home"
import About from "../views/About"
import { BrowserRouter,Routes,Route,Navigate } from "react-router-dom"
//两种路由模式的组件，BrowserRouter(history模式), HashRouter (Hash模式)

// const baseRouter = () => {
// 如果有逻辑，才需要写return，如果没有逻辑直接reture，可以使用下面的简写
//    return()
//}

const baseRouter = () => (
    
        
            }>
                {/*配置用户访问/的时候，重定向到/home路径 */}
                }>
                }>
                }>
            
        
    
)

react新版本路由

新版本采用对象形式的写法

修改router/index.tsx

import Home from "../views/Home"
import About from "../views/About"
import { Navigate } from "react-router-dom"

const routes = [
    {
        path:"/",
        element:
    },
    {
        path:"/home",
        element:
    },
    {
        path:"/about",
        element:
    }
]

export  default routes

修改main.tsx，引入BrowserRouter组件，用回App顶级组件

import React from 'react'
import ReactDOM from 'react-dom/client'
import "reset-css"
import "@/assets/styles/global.scss"

import { BrowserRouter } from "react-router-dom"
import App from './App'

ReactDOM.createRoot(document.getElementById('root') as HTMLElement).render(
  
    
       
    
  
)

修改App.tsx，换成hook形式的对象，引入useRoutes库，实例化一个useRoutes对象outlet，最终展示该对象outlet

import { useState } from 'react'
import {useRoutes, Link} from "react-router-dom"
import router from "./router"

function App() {
  const [count, setCount] = useState(0)
  const outlet =useRoutes(router)

  return (
    

      我的React项目 
      Home
      About
      首页

      {/* 占位符组件，类似窗口，用来展示组件的，有点像vue中的router-view*/}
      {outlet}
    
  )
}

export default App

路由的懒加载

修改router/index.tsx，引入react库中的lazy，定义一个About对象，实例化lazy函数

import { lazy } from "react"
import Home from "../views/Home"
//import About from "../views/About"
import { Navigate } from "react-router-dom"

const About = lazy(()=>import ("../views/About"))

//懒加载的模式的组件写法，外面需要套一层loading的提示加载组件

const routes = [
    {
        path:"/",
        element:
    },
    {
        path:"/home",
        element:
    },
    {
        path:"/about",
        element:
        Loading...

}> } ] export default routes

自定义Loading方法

定义一个Loading函数封装loading组件，引入React库，定义withLoadingComponent组件，设置组件变量为一个JSX.Element对象。

import React,{ lazy } from "react"
import Home from "../views/Home"
//import About from "../views/About"
import User from "../views/User"
import { Navigate } from "react-router-dom"

const About = lazy(()=>import ("../views/About"))

//懒加载的模式的组件写法，外面需要套一层loading的提示加载组件

//定义一个Loading函数
const withLoadingComponent = (comp:JSX.Element) =>{
    return (
        Loading...

}> {comp} ) } const routes = [ { path:"/", element: }, { path:"/home", element: }, { path:"/about", element: Loading...

}> }, { path:"/user", // element: element:withLoadingComponent() }, ] export default routes