【react】react18的学习（十）–路由react-router-dom@6

一、知识内容

与 v5 对比：

• 所有路由配置都在一个根组件内编写，子组件路由在路由标签插槽里写，不在去子组件内单独配置；

import React from 'react'
import { HashRouter, Navigate, NavLink, Route, Routes } from 'react-router-dom'
import A from './router-demo/A'
import B from './router-demo/B'
import C from './router-demo/C'
import D from './router-demo/D'
const App = () => {
  return (
    <HashRouter>
      <NavLink to="/a">a组件</NavLink>
      <NavLink to="/b">b组件</NavLink>
      <NavLink to="/c">c组件</NavLink>
      <Routes>
        <Route path="/" element={<Navigate to="/a" />}></Route>
        <Route path="/a" element={<A />}>
          <Route path="/a/d" element={<D />}></Route>
        </Route>
        <Route path="/b" element={<B />}></Route>
        <Route path="/c/id?/name?" element={<C />}></Route>
        <Route path="*" element={<Navigate to="/a" />}></Route>
      </Routes>
    </HashRouter>
  )
}

export default App

• 路由传参：没变，还是query方式、params路径拼接方式、隐式state传参（刷新还在）；
• 路由跳转：Link\NavLink标签to属性、hooks函数useNavigate，没有useHistory
• 路由对象：只能通过hooks函数获取，有useLocation和useSearchParams、useParam

import React from 'react'
import { NavLink, Outlet, useNavigate } from 'react-router-dom'

const A = () => {
  const navigate = useNavigate()
  const handle = () => {
  	// 1、query方式
    navigate('/c?id=666', { replace: true })
    // 2、路径拼接方式
    // navigate('/c/66/aa')
    // 3、隐式传参，state位置移到外层了
    navigate('/c?id=666', { state: {id:123} })
    // navigate(
    //   {
    //     pathname: '/c',
    //     search: 'id=66',
    //   },
    //   { replace: false }
    // )
  }
  return (
    <div>
      <NavLink to="/a/d?id=66">前往d组件</NavLink>
      <div onClick={handle}>通过hooks跳转</div>
      <Outlet></Outlet>
    </div>
  )
}

export default A

• 获取路径参数

import React from 'react'
import { useLocation, useParams, useSearchParams } from 'react-router-dom'

const C = () => {
  // 1、获取query方式参数：/c?id=66
  const location = useLocation()
  console.log(location.search) //'?id=66'
  // let usp = new URLSearchParams(location.search)
  let [usp] = useSearchParams()
  console.log(usp.get('id'))//66
  // 2、获取路径拼接参数：/c/66/aa
  let params = useParams()
  console.log(params)//{id: '66', name: 'aa'}
  // 3、获取隐式传参
  let location = useLocation()
  console.log(location.state) //{id: '66'}
  return <div>c组件</div>
}

export default C