React学习demo

安装依赖导入

// cnpm install react-router-dom -S
// 或
// yarn add react-router-dom
// index.js
import React from 'react'
import ReactDOM from 'react-dom'

import App from "@/App"

ReactDOM.render(<div>
  <App></App>
</div>, document.getElementById('app'))

App.jsx

// App.jsx
import React from "react"
// HashRouter 表示一个路由的根容器，将来所有的路由相关的东西，都要包裹在 HashRouter 里，而且，一个网站中只使用一次
// Route 表示一个路由规则，在 Route 上有2个比较重要的属性， path 和 component
// Link 表示一个路由的链接，好比 vue 中的 <router-link to=""></router-link>
import { HashRouter, Route, Link, Redirect } from 'react-router-dom'

// 使用 antd UI
import { DatePicker } from 'antd'
 
import Home from "@/conpenents/route/Home"
import Movie from "@/conpenents/route/Movie"
import About from "@/conpenents/route/About"

class App extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      msg: '这是 BindThis组件中的 msg 消息'
    }
  }
  render() {
    // 启用路由
    // HashRouter中，只能有唯一的根元素
    // 一个网站中，只需要使用唯一的一次 <HashRouter>
    return <HashRouter>
      <div>
        <h1>这是 App 根组件 </h1>
        <DatePicker />
        <hr/>
        <Redirect to="/home" />
        <Link to="/home">首页</Link>&nbsp;
        <Link to="/movie/top250/102">电影</Link>&nbsp;
        <Link to="/about">关于</Link>
        <hr/>
        {/* 路由规则 */}
        <Route path="/home" component={ Home }></Route>
        {/* 路由参数匹配 */}
        {/* 获取路由参数：this.props.match.params */}
        <Route path="/movie/:type/:id" component={ Movie } exact ></Route>
        <Route path="/about" component={ About }></Route>
        {this.props.children}
      </div>
    </HashRouter>
  }

}

export default App

Home.jsx

// Home.jsx
import React from "react"

class Home extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      msg: '这是 Home 组件'
    }
  }
  render() {
    return <div>
        <h1>{ this.state.msg }</h1>
      </div>
  }

}

export default Home

Movie.jsx

// Movie.jsx
import React from "react"

class Movie extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      // 方便获取路由参数
      routeParams: props.match.params,
      msg: '这是 Movie 组件'
    }
  }
  render() {
    console.log(this)
    console.log(this.props.match.params)
    return <div>
        <h1>{ this.state.msg }</h1>
        <p>{ this.state.routeParams.type } - { this.state.routeParams.id }</p>
      </div>
  }

}

export default Movie

About.jsx

// About.jsx
import React from "react"

class About extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      msg: '这是 About 组件'
    }
  }
  render() {
    return <div>
        <h1>{ this.state.msg }</h1>
      </div>
  }

}

export default About

注意：按需导入antd，需要配置.babelrc：按需加载