当前位置： 首页 > news >正文

b2c网站开发目的和意义百度营销官网

news 2026/4/7 10:42:10
b2c网站开发目的和意义,百度营销官网,微信开发者工具怎么下载,建设网站的规划书目录： 课程说明一级路由重定向NavLink高亮useRoutes路由表嵌套路由路由的params参数路由的search参数路由的state参数编程式路由导航useRouterContextuseNavigationTypeuseOutletuseResolvedPath()总结项目地址 1.课程说明 概述 React Router以三个不同的包发布…

目录：

  1. 课程说明
  2. 一级路由
  3. 重定向
  4. NavLink高亮
  5. useRoutes路由表
  6. 嵌套路由
  7. 路由的params参数
  8. 路由的search参数
  9. 路由的state参数
  10. 编程式路由导航
  11. useRouterContext
  12. useNavigationType
  13. useOutlet
  14. useResolvedPath()
  15. 总结
  16. 项目地址

1.课程说明

概述

  • React Router以三个不同的包发布到npm 上，它们分别为:
    • 1.react-router:路由的核心库，提供了很多的:组件、钩子。
    • 2.react-router-dom:包含react-router所有内容，并添加一些专门用于DOM的组件，例如<BrowserRouter>等。
    • 3. react-router-native:包括react-router所有内容，并添加一些专门用于ReactNative的API例如:<NativeRouter>等。
  • 2.与React Router 5.x版本相比，改变了什么?
    • 1.内置组件的变化:移除<Switch/>，新增<Routes/>等。
    • ⒉.语法的变化: component={About]变为element={<About/>}等。
    • 3.新增多个hook: useParams 、useNavigate 、useMatch 等。
    • 4.官方明确推荐函数式组件了!!!

2.一级路由 

About.jsx

import React from 'react';function About(props) {return (<div><h3>我是About的内容</h3></div>);
}export default About;

Home.jsx

import React from 'react';function Home(props) {return (<div><h3>我是Home的内容</h3></div>);
}export default Home;

 App.js

import React from 'react';
import {NavLink, Routes, Route} from "react-router-dom";
import About from "./pages/About";
import Home from "./pages/Home";function App(props) {return (<div><div className="row"><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2></div></div></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className="list-group-item" to="/about">About</NavLink><NavLink className="list-group-item" to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body"><Routes><Route path="/about" element={<About></About>}></Route><Route path="/home" element={<Home></Home>}></Route></Routes></div></div></div></div></div>);
}export default App;

index.js

import React from 'react';
import ReactDOM from 'react-dom/client';
import App from './App';
import {BrowserRouter} from "react-router-dom";const root = ReactDOM.createRoot(document.getElementById('root'));root.render(<BrowserRouter><App/></BrowserRouter>
);

3.重定向

App.js

import React from 'react';
import {NavLink, Routes, Route, Navigate} from "react-router-dom";
import About from "./pages/About";
import Home from "./pages/Home";function App(props) {return (<div><div className="row"><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2></div></div></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className="list-group-item" to="/about">About</NavLink><NavLink className="list-group-item" to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body"><Routes><Route path="/ABOUT" caseSensitive element={<About></About>}></Route><Route path="/home" element={<Home></Home>}></Route><Route path="/" element={<Navigate to="/about"/>}></Route></Routes></div></div></div></div></div>);
}export default App;

 Home.jsx

import React, {useState} from 'react';
import {Navigate} from "react-router-dom";function Home(props) {const [sum, setSum] = useState(1)return (<div><h3>我是Home的内容</h3>{sum === 2 ? <Navigate to="/about/" replace={true}/> : <h4>当前sum的值是：{sum}</h4>}<button onClick={() => setSum(2)}>点我将sum变为2</button></div>);
}export default Home;

4.NavLink高亮

App.js

import React from 'react';
import {NavLink, Routes, Route, Navigate} from "react-router-dom";
import About from "./pages/About";
import Home from "./pages/Home";function App(props) {function computedClassName({isActive}) {return isActive ? 'list-group-item atguigu' : 'list-group-item'}return (<div><div className="row"><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2></div></div></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className={computedClassName} to="/about">About</NavLink><NavLink className={computedClassName} to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body"><Routes><Route path="/about" element={<About></About>}></Route><Route path="/home" element={<Home></Home>}></Route><Route path="/" element={<Navigate to="/about"/>}></Route></Routes></div></div></div></div></div>);
}export default App;

 About.jsx

import React from 'react';function About(props) {return (<div><h3>我是About的内容</h3></div>);
}export default About;

Home.jsx

import React from 'react';function Home(props) {return (<div><h3>我是Home的内容</h3></div>);
}export default Home;

5.useRoutes路由表

route/index.js

import About from "../pages/About";
import Home from "../pages/Home";
import {Navigate} from "react-router-dom";export default [{path: '/about',element: <About></About>},{path: '/home',element: <Home></Home>},{path: '/',element: <Navigate to="/about"></Navigate>},
]

 App.js

import React from 'react';
import {NavLink, useRoutes} from "react-router-dom";
import routes from "./routes";function App(props) {const element = useRoutes(routes)return (<div><div className="row"><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2></div></div></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className="list-group-item" to="/about">About</NavLink><NavLink className="list-group-item" to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body">{/*<Routes>*/}{/*    <Route path="/about" element={<About></About>}></Route>*/}{/*    <Route path="/home" element={<Home></Home>}></Route>*/}{/*    <Route path="/" element={<Navigate to="/about"/>}></Route>*/}{/*</Routes>*/}{element}</div></div></div></div></div>);
}export default App;

 6.嵌套路由

 App.js

import React from 'react';
import {NavLink, useRoutes} from "react-router-dom";
import routes from "./routes";function App(props) {const element = useRoutes(routes)return (<div><div className="row"><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2></div></div></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className="list-group-item" to="/about">About</NavLink><NavLink className="list-group-item" end to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body">{/*<Routes>*/}{/*    <Route path="/about" element={<About></About>}></Route>*/}{/*    <Route path="/home" element={<Home></Home>}></Route>*/}{/*    <Route path="/" element={<Navigate to="/about"/>}></Route>*/}{/*</Routes>*/}{element}</div></div></div></div></div>);
}export default App;

route/index.js

import About from "../pages/About";
import Home from "../pages/Home";
import {Navigate} from "react-router-dom";
import News from "../pages/News";
import Message from "../pages/Message";export default [{path: '/about',element: <About></About>},{path: '/home',element: <Home></Home>,children: [{path: 'news',element: <News></News>},{path: 'message',element: <Message></Message>}]},{path: '/',element: <Navigate to="/about"></Navigate>},
]

News.jsx

import React from 'react';function News(props) {return (<div><ul><li>news001</li><li>news002</li><li>news003</li></ul></div>);
}export default News;

Message.jsx

import React from 'react';function Message(props) {return (<div><ul><li><a href="/message1">message001</a>&nbsp;&nbsp;</li><li><a href="/message2">message002</a>&nbsp;&nbsp;</li><li><a href="/message/3">message003</a>&nbsp;&nbsp;</li></ul></div>);
}export default Message;

Home.jsx

import React from 'react';
import {NavLink, Outlet} from "react-router-dom";function Home(props) {return (<div><h2>Home组件内容</h2><div><ul className="nav nav-tabs"><li><NavLink className="list-group-item" to="news">News</NavLink>{/*<NavLink className="list-group-item" to="./news">News</NavLink>*/}{/*<NavLink className="list-group-item" to="/home/news">News</NavLink>*/}</li><li><NavLink className="list-group-item " to="message">Message</NavLink>{/*<NavLink className="list-group-item " to="./message">Message</NavLink>*/}{/*<NavLink className="list-group-item " to="/home/message">Message</NavLink>*/}</li></ul><Outlet></Outlet></div></div>);
}export default Home;

About.jsx

import React from 'react';function About(props) {return (<div><h3>我是About的内容</h3></div>);
}export default About;

7.路由的params参数

Detail.jsx

import React from 'react';
import {useMatch, useParams} from "react-router-dom";function Detail(props) {const {id, title, content} = useParams()const x = useMatch('/home/message/detail/:id/:title/:content')console.log(x)return (<div><ul><li>消息编号：{id}</li><li>消息标题：{title}</li><li>消息内容:{content}</li></ul></div>);
}export default Detail;

Message.jsx

import React, {useState} from 'react';
import {Link, Outlet} from "react-router-dom";function Message(props) {const [messages] = useState([{id: '001', title: '消息1', content: '锄禾日当午'},{id: '002', title: '消息2', content: '汗滴禾下土'},{id: '003', title: '消息3', content: '谁知盘中餐'},{id: '004', title: '消息4', content: '粒粒皆辛苦'},])return (<div><ul>{messages.map((m) => {return (<li key={m.id}><Link to={`detail/${m.id}/${m.title}/${m.content}`}>{m.title}</Link>&nbsp;&nbsp;</li>)})}</ul><hr></hr><Outlet></Outlet></div>);
}export default Message;

routes/index.js

import About from "../pages/About";
import Home from "../pages/Home";
import {Navigate} from "react-router-dom";
import News from "../pages/News";
import Message from "../pages/Message";
import Detail from "../pages/Detail";export default [{path: '/about',element: <About></About>},{path: '/home',element: <Home></Home>,children: [{path: 'news',element: <News></News>},{path: 'message',element: <Message></Message>,children: [{path: 'detail/:id/:title/:content',element: <Detail></Detail>}]}]},{path: '/',element: <Navigate to="/about"></Navigate>},
]

8.路由的search参数

Detail.jsx

import React from 'react';
import {useLocation, useSearchParams} from "react-router-dom";function Detail(props) {const [search, setSearch] = useSearchParams()const id = search.get('id')const title = search.get('title')const content = search.get('content')const x = useLocation()console.log(x)return (<div><ul><li><button onClick={() => setSearch('id=008&title=哈哈&content=嘻嘻')}>点我更新一下收到的search参数</button></li><li>消息编号：{id}</li><li>消息标题：{title}</li><li>消息内容：{content}</li></ul></div>);
}export default Detail;

Message.jsx

import React, {useState} from 'react';
import {Link, Outlet} from "react-router-dom";function Message(props) {const [messages] = useState([{id: '001', title: '消息1', content: '锄禾日当午'},{id: '002', title: '消息2', content: '汗滴禾下土'},{id: '003', title: '消息3', content: '谁知盘中餐'},{id: '004', title: '消息4', content: '粒粒皆辛苦'},])return (<div><ul>{messages.map((m) => {return (<li key={m.id}>{/*<Link to={`detail/${m.id}/${m.title}/${m.content}`}>{m.title}</Link>&nbsp;&nbsp;*/}<Link to={`detail?id=${m.id}&title=${m.title}&content=${m.content}`}>{m.title}</Link>&nbsp;&nbsp;</li>)})}</ul><hr></hr><Outlet></Outlet></div>);
}export default Message;

index.js

import About from "../pages/About";
import Home from "../pages/Home";
import {Navigate} from "react-router-dom";
import News from "../pages/News";
import Message from "../pages/Message";
import Detail from "../pages/Detail";export default [{path: '/about',element: <About></About>},{path: '/home',element: <Home></Home>,children: [{path: 'news',element: <News></News>},{path: 'message',element: <Message></Message>,children: [{path: 'detail',element: <Detail></Detail>}]}]},{path: '/',element: <Navigate to="/about"></Navigate>},
]

9.路由的state参数

Detail.jsx

import React from 'react';
import {useLocation} from "react-router-dom";function Detail(props) {const {state: {id, title, content}} = useLocation()return (<div><ul><li>消息编号：{id}</li><li>消息标题：{title}</li><li>消息内容：{content}</li></ul></div>);
}export default Detail;

Message.jsx

import React, {useState} from 'react';
import {Link, Outlet} from "react-router-dom";function Message(props) {const [messages] = useState([{id: '001', title: '消息1', content: '锄禾日当午'},{id: '002', title: '消息2', content: '汗滴禾下土'},{id: '003', title: '消息3', content: '谁知盘中餐'},{id: '004', title: '消息4', content: '粒粒皆辛苦'},])return (<div><ul>{messages.map((m) => {return (<li key={m.id}>{/*<Link to={`detail/${m.id}/${m.title}/${m.content}`}>{m.title}</Link>&nbsp;&nbsp;*/}{/*<Link to={`detail?id=${m.id}&title=${m.title}&content=${m.content}`}>{m.title}</Link>*/}<Link to="detail"state={{id: m.id, title: m.title, content: m.content}}>{m.title}</Link>&nbsp;&nbsp;</li>)})}</ul><hr></hr><Outlet></Outlet></div>);
}export default Message;

routes/index.js

import About from "../pages/About";
import Home from "../pages/Home";
import {Navigate} from "react-router-dom";
import News from "../pages/News";
import Message from "../pages/Message";
import Detail from "../pages/Detail";export default [{path: '/about',element: <About></About>},{path: '/home',element: <Home></Home>,children: [{path: 'news',element: <News></News>},{path: 'message',element: <Message></Message>,children: [{path: 'detail',element: <Detail></Detail>}]}]},{path: '/',element: <Navigate to="/about"></Navigate>},
]

10.编程式路由导航

Header.jsx

import React from 'react';
import {useNavigate} from "react-router-dom";function Header(props) {const navigate = useNavigate()function back() {navigate(-1)}function forward() {navigate(1)}return (<div><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2><button onClick={back}>后退</button><button onClick={forward}>前进</button></div></div></div>);
}export default Header;

Message.jsx

import React, {useState} from 'react';
import {Link, Outlet, useNavigate} from "react-router-dom";function Message(props) {const [messages] = useState([{id: '001', title: '消息1', content: '锄禾日当午'},{id: '002', title: '消息2', content: '汗滴禾下土'},{id: '003', title: '消息3', content: '谁知盘中餐'},{id: '004', title: '消息4', content: '粒粒皆辛苦'},])const navigate = useNavigate()function showDetail(m) {navigate('detail', {replace: false, state: {id: m.id, title: m.title, content: m.content}})}return (<div><ul>{messages.map((m) => {return (<li key={m.id}>{/*<Link to={`detail/${m.id}/${m.title}/${m.content}`}>{m.title}</Link>&nbsp;&nbsp;*/}{/*<Link to={`detail?id=${m.id}&title=${m.title}&content=${m.content}`}>{m.title}</Link>*/}<Link to="detail"state={{id: m.id, title: m.title, content: m.content}}>{m.title}</Link><button onClick={() => showDetail(m)}>查看详情</button></li>)})}</ul><hr></hr><Outlet></Outlet></div>);
}export default Message;

App.js

import React from 'react';
import {NavLink, useRoutes} from "react-router-dom";
import routes from "./routes";
import Header from "./components/Header";function App(props) {const element = useRoutes(routes)return (<div><div className="row"><Header></Header></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className="list-group-item" to="/about">About</NavLink><NavLink className="list-group-item" to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body">{/*<Routes>*/}{/*    <Route path="/about" element={<About></About>}></Route>*/}{/*    <Route path="/home" element={<Home></Home>}></Route>*/}{/*    <Route path="/" element={<Navigate to="/about"/>}></Route>*/}{/*</Routes>*/}{element}</div></div></div></div></div>);
}export default App;

11.useRouterContext

  • uselnRouterContext()
  • 作用:如果组件在<Router>的上下文中呈现，则useInRouterContext钩子返回true，否则返回false。

index.js

import React from 'react';
import ReactDOM from 'react-dom/client';
import App from './App';
import {BrowserRouter} from "react-router-dom";
import Demo from "./components/Demo";const root = ReactDOM.createRoot(document.getElementById('root'));root.render(<Demo></Demo>,<BrowserRouter><App/></BrowserRouter>
);

 App.js

import React from 'react';
import {NavLink, useInRouterContext, useRoutes} from "react-router-dom";
import routes from "./routes";
import Header from "./components/Header";function App(props) {const element = useRoutes(routes)console.log('@',useInRouterContext())return (<div><div className="row"><Header></Header></div><div className="row"><div className="col-xs-2 col-xs-offset-2"><div className="list-group"><NavLink className="list-group-item" to="/about">About</NavLink><NavLink className="list-group-item" to="/home">Home</NavLink></div></div><div className="col-xs-6"><div className="panel"><div className="panel-body">{/*<Routes>*/}{/*    <Route path="/about" element={<About></About>}></Route>*/}{/*    <Route path="/home" element={<Home></Home>}></Route>*/}{/*    <Route path="/" element={<Navigate to="/about"/>}></Route>*/}{/*</Routes>*/}{element}</div></div></div></div></div>);
}export default App;

Demo.jsx

import React from 'react';
import {useInRouterContext} from "react-router-dom";function Demo(props) {console.log(useInRouterContext())return (<div>demo</div>);
}export default Demo;

 Header.jsx

import React from 'react';
import {useInRouterContext, useNavigate} from "react-router-dom";function Header(props) {const navigate = useNavigate()console.log(useInRouterContext())function back() {navigate(-1)}function forward() {navigate(1)}return (<div><div className="col-xs-offset-2 col-xs-8"><div className="page-header"><h2>React Router Demo</h2><button onClick={back}>后退</button><button onClick={forward}>前进</button></div></div></div>);
}export default Header;

12.useNavigationType

  • useNavigationType()
  • 作用:返回当前的导航类型（(用户是如何来到当前页面的)。
  • 返回值:POP、PUSH、REPLACE]。
  • 备注:PoP是指在浏览器中直接打开了这个路由组件（刷新页面)。

 News.jsx

import React from 'react';
import {useNavigationType} from "react-router-dom";function News(props) {console.log(useNavigationType())return (<div><ul><li>news001</li><li>news002</li><li>news003</li></ul></div>);
}export default News;

 

13.useOutlet

  • useOutlet()
  • 作用:用来呈现当前组件中要渲染的嵌套路由。
  • 示例代码:
const result = useoutlet( )
console.log( result)
//如果嵌套路由没有挂载,则result为null
//如果嵌套路由已经挂载,则展示嵌套的路由对象

Home.jsx

import React from 'react';
import {NavLink, Outlet, useOutlet} from "react-router-dom";function Home(props) {console.log(useOutlet())return (<div><h2>Home组件内容</h2><div><ul className="nav nav-tabs"><li><NavLink className="list-group-item" to="news">News</NavLink></li><li><NavLink className="list-group-item " to="message">Message</NavLink></li></ul><Outlet></Outlet></div></div>);
}export default Home;

 

14.useResolvedPath()

  • useResolvedPath()
  • 作用:给定一个URL值，解析其中的: path、search、hash值。 

News.jsx

import React from 'react';
import {useResolvedPath} from "react-router-dom";function News(props) {console.log(useResolvedPath('/user?id=001&name=tom#qwe'))return (<div><ul><li>news001</li><li>news002</li><li>news003</li></ul></div>);
}export default News;

15.总结：

2.Component

1. <BrowserRouter>

  • 说明:<BrowserRouter>用于包裹整个应用。
  • 示例代码:
  • import React from "react";
import ReactDOM from "react-dom" ;
import { BrowserRouter } from "react-router-dom" ;ReactDOM.render(
<BrowserRouter>
{/*整体结构（通常为App组件）*/}
</BrowserRouter> ,root
);

2.<HashRouter>

  • 说明:作用与<BrowserRouter>一样，但<HashRouter>修改的是地址栏的hash值。
  • 备注:6.x版本中<HashRouter>、<BrowserRouter>的用法与5.x相同。

3.<Routes/> 与<Route/>

  1. v6版本中移出了先前的<Switch>，引入了新的替代者:<Routes>。
  2. <Routes>和<Route>要配合使用，且必须要用<Routes>包裹<Route>。
  3. <Route>相当于一个if语句，如果其路径与当前URL匹配，则呈现其对应的组件。 
  4. <Route caseSensitive>属性用于指定:匹配时是否区分大小写(默认为false)。
  5. 当URL发生变化时，<Routes>都会查看其所有子<Route>元素以找到最佳匹配并呈现组件。
  6. <cRoute也可以嵌套使用，且可配合useRoutes()配置“路由表”，但需要通过<outlet>组件来渲染其子路由。
  7. 示例代码:

4.<Link>

  • 作用:修改URL，且不发送网络请求(路由链接)。

5.<NavLink>

  • 作用:与<Link>组件类似，且可实现导航的“高亮"效果。
  • 示例代码: 

 

6.<Navigate>

  • 作用:只要<Navigate>组件被渲染，就会修改路径，切换视图。
  • replace属性用于控制跳转模式(push或 replace，默认是push) 。
  • 示例代码: 

 

7. <outlet>

  • 当<Route>产生嵌套时，渲染其对应的后续子路由。
3.Hooks

1.useRoutes()

  • 作用:根据路由表，动态创建<Routes>和<Route> 。

2.useNavigate

  • 作用:返回一个函数用来实现编程式导航。
  • 示例代码: 

 

3. useParams()

  • 作用:回当前匹配路由的params参数，类似于5.x中的match.params .
  • 示例代码:

 

4.useSearchParams() 

  • 作用:用于读取和修改当前位置的URL中的查询字符串。
  • 返回一个包含两个值的数组，内容分别为:当前的seaech参数、更新search的函数。
  • 示例代码:

 

5.useLocation()

  • 作用:获取当前location信息，对标5.x中的路由组件的location属性。
  • 示例代码: 

 

6.useMatch() 

  • 作用:返回当前匹配信息，对标5.x中的路由组件的match属性。
  • 示例代码:

 

16.项目地址

 https://gitee.com/coderPatrickStar/react/tree/master/20231003

http://www.hkea.cn/news/835587/

相关文章：

  • 化妆品 网站建设案例seo超级外链工具免费
  • 网站建设的广告语seo自动工具
  • 有专门做市场分析的网站么太原关键词优化报价
  • 网站文化建设搜索引擎推广的常见形式有
  • wordpress分类目录消失泸州网站seo
  • 易云巢做网站公司seo入门到精通
  • 新津网站建设百度ai助手入口
  • 做学校网站什么文案容易上热门
  • 网站开发技术包括郑州网站关键词排名
  • 网站开发预算怎么算百度竞价ocpc
  • 成都锐度设计公司怎么样优化大师怎么提交作业
  • 租用网站服务器东莞市网站建设
  • 馆陶县网站网站运营管理
  • 西双版纳傣族自治州医院seo搜索优化网站推广排名
  • wordpress站点网址小吃培训2000元学6项
  • 郑州网站制作天强科技seo百度发包工具
  • 江阴市住房与建设局网站seo工资多少
  • wordpress image.php南宁百度首页优化
  • 谢家华做网站百度指数与百度搜索量
  • wordpress 安装 ubuntu整站优化代理
  • 做公司网站协议书模板下载百度竞价推广公司
  • 福田蒙派克6座二手值多少钱重庆seo点击工具
  • 有了域名 怎么做网站外贸网站推广方法之一
  • 审美网站长春网站建设路
  • 网站 管理系统域名查询注册信息查询
  • 专业网站设计发展前景推广网站软文
  • 怎么建设seo自己网站网站优化推广教程
  • 最新app开发软件石家庄网站建设seo公司
  • 江苏自助建站系统哪家好推广网站要注意什么
  • 唐河做网站关键字搜索引擎