使用create-react-app创建的typescript项目，想引入react-router-dom，所以安装了@types/react-router-dom

通过 import {HashRouter,Switch,Route} from 'react-router-dom' 引入

import React, { Component } from 'react';
import {HashRouter,Switch,Route} from 'react-router-dom'
import logo from './logo.svg';
import './App.css';

class App extends Component {
  render() {
    return (
      <div className="App">
        <HashRouter >

          <Route />

        </HashRouter>
      </div>
    );
  }
}

export default App;

如果不放入任何 HashRouter，Switch或Route都没事，只要使用了，就会报错

报错如下：

Module not found: Can't resolve 'react-router-dom' in 'd:\react-ts\src'

google了也没找到答案，希望有人能解答一下。