as in the question, is there any third-party plug-in that can load on demand?
the current Router code is as follows:

import * as React from "react";
import {HashRouter,BrowserRouter,Router,Route,Switch,Link,Redirect} from "react-router-dom";
import {Provider} from "react-redux";
import configureStore from "../store/configureStore";

import Hello from "../views/Hello";
import Home from "../views/Home";
import NotFound from "../views/NotFound";



const store = configureStore();

const App =()=>(
    <Provider store={store}>
        <HashRouter>
            <Switch>
                    <Route exact path="/" component={Home} />
                    <Route path="/Hello" 
                        component = {Hello}
                    ></Route>
                    <Route path="/Home" 
                        component = {Home}
                    ></Route>
                    <Route path="/NotFound"
                      component = {NotFound}
                    ></Route>
                     
                    <Redirect exact path="*" to="/NotFound"></Redirect>
            </Switch>
        </HashRouter>
    </Provider>
)
export default App;

how to load on demand