项目修改自 上一节 的 Demo

1、routes.js

import { Navigate } from 'react-router-dom'
import About from '../components/About'
import Home from '../components/Home'
import Message from '../components/Home/Message'
import News from '../components/Home/News'
import Detail from '../components/Home/Message/Detail'

const routes = [{
    path: '/about',
    element: <About />
}, {
    path: '/home',
    element: <Home />,
    children: [{
        path: 'news',
        element: <News />
    }, {
        path: 'message',
        element: <Message />,
        children: [{
            path: 'detail',
            element: <Detail />
        }]
    }]
}, {
    path: '/',
    element: <Navigate to='/about' />
}]

export default routes

2、Message.jsx

import React, { useState } from 'react'
import { Link, Outlet } from 'react-router-dom'

export default function Message() {

    const [messages] = useState([{
        id: '001',
        title: '小道消息',
        info: '介个就是小道消息~'
    }, {
        id: '002',
        title: '大道消息',
        info: '介个就是大道消息！！！'
    }, {
        id: '003',
        title: '大道消息Plus',
        info: '介个就是大道消息Plus~'
    }])

    return (
        <div>
            <ul>
                {
                    messages.map(m => (
                        <li key={m.id}>
                            <Link to={`detail?id=${m.id}&title=${m.title}&nfo=${m.info}`}>{m.title}</Link>
                        </li>
                    ))
                }
            </ul>
            <Outlet />
        </div>
    )
}

3、Detail.jsx

• 使用新Hook useSearchParams 接 search参数

import React from 'react'
import { useSearchParams } from 'react-router-dom'

export default function Detail() {

    const [search, setSearch] = useSearchParams()

    const id = search.get('id')
    const title = search.get('title')
    const info = search.get('info')

    return (
        <>
            <ul>
                <li>id：{id}</li>
                <li>标题：{title}</li>
                <li>内容：{info}</li>
            </ul>
            <button onClick={() => setSearch('id=5000&title=新标题&info=小猪佩奇')}>点我更新search参数</button>
        </>
    )
}

4、Result

5、另外一个可以获取 search 的新 Hook ：useLocation

• 可以用 useLocation，但是正常人不会用它接 search 的值

修改上面 Detail.jsx

import React from 'react'
import { useLocation } from 'react-router-dom'

export default function Detail() {

    console.log(useLocation())
    
    // 其他略...
}

• 看一眼控制台