text: import React from 'react';
  import Main from './main/main';
  import CitySelect from "./city/city-select/city-select";
  import CityManage from './city/city-manage/city-manage';
  import Navbar from './navbar/navbar';
  import { BrowserRouter as Router, Route } from "react-router-dom";
  
  export default class App extends React.Component {
    render() {
      return (
        <Router>
          <Route path="/" exact component={Main} />
          <Route path="/city-select" exact component={CitySelect} />
          <Route path="/city-manage" exact component={CityManage} />
          <Route component={Navbar} />
        </Router>
      );
    }
  }