React-Router基础用法

index.js

一、React-Router介绍

1. react的一个插件库。

2. 专门用来实现一个SPA应用。

3. 基于react的项目基本都会用到此库。

二、react-router-dom相关API

   1. <BrowserRouter>
   2. <HashRouter>
   3. <Route>
   4. <Redirect>
   5. <Link>
   6. <NavLink>

三、基础路由使用

3.1下载

npm i react-router-dom@5

3.2使用

App.jsx

import React, { Component } from 'react';
import { NavLink, Route } from 'react-router-dom';
import './App.css';
import Header from './components/Header'; //Header是一般组件
import About from './pages/About'; //About是路由组件
import Home from './pages/Home'; //Home是路由组件
export default class App extends Component {
  render() {
    return (
      <div>
        <div className="row">
          <div className="col-xs-offset-2 col-xs-8">
            <Header />
          </div>
        </div>
        <div className="row">
          <div className="col-xs-2 col-xs-offset-2">
            <div className="list-group">
              {/* 原生html中，靠<a>跳转不同的页面 */}
              {/* <a className="list-group-item" href="./about.html">About</a>
							<a className="list-group-item active" href="./home.html">Home</a> */}

              {/* 在React中靠路由链接实现切换组件--编写路由链接 */}
              <NavLink
                activeClassName="on"
                className="list-group-item"
                to="/about"
              >
                About
              </NavLink>
              <NavLink
                activeClassName="on"
                className="list-group-item"
                to="/home"
              >
                Home
              </NavLink>
            </div>
          </div>
          <div className="col-xs-6">
            <div className="panel">
              <div className="panel-body">
                {/* 注册路由 */}
                <Route path="/about" component={About} />
                <Route path="/home" component={Home} />
              </div>
            </div>
          </div>
        </div>
      </div>
    );
  }
}

index.js

import React from 'react';
import ReactDOM from 'react-dom/client';
//引入BrowserRouter依赖
import { BrowserRouter } from 'react-router-dom';
import App from './App';
import './index.css';
import reportWebVitals from './reportWebVitals';

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
  <React.StrictMode>
    <BrowserRouter>
      <App />
    </BrowserRouter>
  </React.StrictMode>
);

reportWebVitals();

pages/Home/index.jsx

import React, { Component } from 'react'

export default class Home extends Component {
	render() {
		return (
			<h3>我是Home的内容</h3>
		)
	}
}

pages/About/index.jsx

import React, { Component } from 'react'

export default class About extends Component {
	render() {
		// console.log('About组件收到的props是',this.props);
		return (
			<h3>我是About的内容</h3>
		)
	}
}

components/Header/index.jsx

import React, { Component } from 'react'

export default class Header extends Component {
	render() {
		// console.log('Header组件收到的props是',this.props);
		return (
			<div className="page-header"><h2>React Router Demo</h2></div>
		)
	}
}