我试图按照指南设置一个 react-router-dom 高阶组件。我有个问题说..
元素类型无效：应为字符串（对于内置组件）或类/函数（对于复合组件）但得到：对象。您可能忘记从定义组件的文件中导出组件，或者您可能混淆了默认导入和命名导入。检查 的渲染方法
component。
这是我的代码。
应用程序.js
import React from 'react';
import {
BrowserRouter as Router,
Route,
} from 'react-router-dom';
import Navigation from './Navigation';
import LandingPage from './Landing';
import SignUpPage from './SignUp';
import SignInPage from './SignIn';
import PasswordForgetPage from './PasswordForget';
import HomePage from './Home';
import AccountPage from './Account';
import * as routes from '../constants/routes';
const App = () =>
<Router>
<div>
<Navigation />
<hr/>
<Route exact path={routes.LANDING} component={() => <LandingPage />} />
<Route exact path={routes.SIGN_UP} component={() => <SignUpPage />} />
<Route exact path={routes.SIGN_IN} component={() => <SignInPage />} />
<Route exact path={routes.PASSWORD_FORGET} component={() => <PasswordForgetPage />} />
<Route exact path={routes.HOME} component={() => <HomePage />} />
<Route exact path={routes.ACCOUNT} component={() => <AccountPage />} />
</div>
</Router>
export default App;和我的 index.js
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './components/App';
import { unregister } from './registerServiceWorker';
ReactDOM.render(<App />, document.getElementById('root'));
unregister();谢谢。