React 中的前端路由 react-router-dom

安裝react路由

npm install react-router-dom --save

準備好兩個組件頁面 Counter.js和myBtn.js，作為演示使用

修改index.js

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import * as serviceWorker from './serviceWorker';
import 'antd/dist/antd.css'; // or 'antd/dist/antd.less'
import {BrowserRouter,Route,Link} from 'react-router-dom';
import Counter from './Counter';
import ButtonSize from './myBtn';

/* <App />是jsx語法，需要React的支持 */
ReactDOM.render(
    <BrowserRouter>
      <div>
        <Route path="/counter" component={Counter} />
        <Route path="/mybtn" component={ButtonSize} />
      </div>
    </BrowserRouter>,
  document.getElementById('root')
);

// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: https://bit.ly/CRA-PWA
serviceWorker.unregister();

輸入網址即可定位到指定頁面

在某個頁面使用Link組件可以定義鏈接

myBtn.js

import React,{Component} from 'react';
import { Button, Radio } from 'antd';
import { DownloadOutlined } from '@ant-design/icons';
import {Link} from 'react-router-dom';

class ButtonSize extends React.Component {
    state = {
      size: 'large',
    };
  
    handleSizeChange = e => {
      this.setState({ size: e.target.value });
    };
  
    render() {
      const { size } = this.state;
      return (
        <div>
          <Radio.Group value={size} onChange={this.handleSizeChange}>
            <Radio.Button value="large">Large</Radio.Button>
            <Radio.Button value="default">Default</Radio.Button>
            <Radio.Button value="small">Small</Radio.Button>
          </Radio.Group>
          <br />
          <br />
          <Button type="primary" size={size}>
            Primary
          </Button>
          <Button size={size}>Default</Button>
          <Button type="dashed" size={size}>
            Dashed
          </Button>
          <br />
          <Link to="/counter">
            <Button type="link" size={size}>
                return last page
            </Button>
          </Link>
          <br />
          <Button type="primary" icon={<DownloadOutlined />} size={size} />
          <Button type="primary" shape="circle" icon={<DownloadOutlined />} size={size} />
          <Button type="primary" shape="round" icon={<DownloadOutlined />} size={size} />
          <Button type="primary" shape="round" icon={<DownloadOutlined />} size={size}>
            Download
          </Button>
          <Button type="primary" icon={<DownloadOutlined />} size={size}>
            Download
          </Button>
        </div>
      );
    }
  }
  
 export default ButtonSize;

 點擊返回列表頁

關於路由的參數

修改index.js

 修改myBtn.js

 在Counter.js中接收參數