如果你安装了react-router和react-router-dom v6 beta，就像这样卸载:

npm uninstall --save react-router react-router-dom

然后用这个安装:

npm install --save react-router react-router-dom

它将安装非beta版的最新版本。

然后我们只需要重新启动Visual Studio Code或任何你处理它的文本编辑器。

如果你正在使用一个更新版本的react-router-dom(例如，在我的例子中是^6.2.1)，你应该将<Switch>更改为<Routes>，并使用<Route>和component={<SampleComponent />}参数。

特别是下面的代码示例:

import { BrowserRouter as Router, Routes, Route} from 'react-router-dom';
import MyComponent from './containers/MyComponent';

export default function AppRoutes() {
    return (
        <Routes>
            <Route exact path="/" component={<MyComponent />}>
            </Route>
        </Routes>
    );
}

写入<路由>而不是<交换机>。

在终端中运行:

npm install --save react-router react-router-dom

这对我很有帮助。或检查文件包。在“react-dom”后面添加以下内容:“^17.0.2”，

 "react-router": "^6.0.0",

在react-router-dom v6中，开关被路由替换。下面是配置react-router-dom v6的简单示例。

import * as React from 'react';
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';

import Layout from './components/Layout';
import ProtectedRoute from './components/ProtectedRoute';
import LoginPage from './pages/LoginPage';
import WizardPage from './pages/WizardPage';
import RequestsPage from './pages/RequestsPage';

import './App.scss'

export class App extends React.Component {
    public render() {
        const sharedRouteProps = { exact: true, authenticationPath: '/login' };
        const wizardRouteProps = { ...sharedRouteProps, path: "/", component: WizardPage };
        const requestsRouteProps = { ...sharedRouteProps, path: "/requests", component: RequestsPage };

        return (
            <Layout>
              <Router>
                <Switch>
                    <Route exact path='/login' component={LoginPage} />
                    <ProtectedRoute {...wizardRouteProps} />
                    <ProtectedRoute {...requestsRouteProps} />
                </Switch>
              </Router>
            </Layout>
        );
    }
}

语法已经改变

旧的语法

import { BrowserRouter as Router, Switch, Route, Link } from "react-router-dom";

<Switch>
    <Route path="/home" component={Home} />
</Switch>

新语法:

import { BrowserRouter as Router, Routes, Route, Link } from "react-router-dom";

<Routes>
    <Route path="/home" element={<Home/>} />
</Routes>

如果你使用react-router-dom version6，请使用Routes而不是Switch