我和杂志海报上的人面临着同样的问题。我尝试了以下所有的方法:

卸载并安装react-router-dom 分别从react-router-dom导入Switch

但对我来说什么都没用。

请遵循以下指示。我相信你不会再得到错误。

正确的代码:

import React from "react";
import "./App.css";
import NavBar from "./components/navbar.js";
import Footer from "./components/footer.js";
import Home from "./components/pages/homepage/home.js";
import { BrowserRouter as Router, Routes, Route, Link } from "react-router-dom";

function App() {
  return (
    <Router>
      <div className="app-container">
        <NavBar />
        <Routes>
          <Route path="/home" element={<Home/>} />
        </Routes>
        <Footer />
      </div>
    </Router>
  );
}

export default App;

注意:Switch已经被替换为Routes，我们需要使用element而不是component。

如果你正在使用react-router-dom的版本6，请使用这个

另外，请参考这里:https://reactrouter.com/docs/en/v6/upgrading/v5#:~:text=single%20route%20config%3A-，//%20This%20is%20a%20React%20Router%20v6%20app，%7D，-This%20step%20is

// This is a React Router v6 app
import {
  BrowserRouter,
  Routes,
  Route,
  Link,
  Outlet
} from "react-router-dom";

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path="/" element={<Home />} />
        <Route path="users" element={<Users />}>
          <Route path="me" element={<OwnUserProfile />} />
          <Route path=":id" element={<UserProfile />} />
        </Route>
      </Routes>
    </BrowserRouter>
  );
}

function Users() {
  return (
    <div>
      <nav>
        <Link to="me">My Profile</Link>
      </nav>

      <Outlet />
    </div>
  );
}

如果你正在使用react-router-dom v6，你必须改变Switch到Routes，如下面的例子所示:

而不是导入Switch， import {Switch，…} from 'react-router-dom';

进口航线 import{路由，…} from 'react-router-dom';

然后，不要使用component ={ComponentName}，而是使用element={<ComponentName/>}，如下所示:

import { Routes, Route, ...} from 'react-router-dom';
    .
    .
    .  
    <Routes>
      <Route exact path='/' element={<Home/>}></Route>
    </Routes>

我解决了我的错误，通过改变我渲染我的路线使用元素的方式。

To:

import React from "react";
import { BrowserRouter as Router, Route, Routes } from "react-router-dom";
import { Home } from "./app";
import { Login, Register } from "./auth";
const R: React.FC = () => {
  return (
    <Router>
      <Routes>
        <Route path="/login" caseSensitive={false} element={<Login />} />
        <Route path="/register" caseSensitive={false} element={<Register />} />
        <Route path="/" caseSensitive={false} element={<Home />} />
      </Routes>
    </Router>
  );
};
export default R;

基本上在v6之前。*:

import React from "react";
import { BrowserRouter as Router, Route, Switch} from "react-router-dom";
import { Home } from "./app";
import { Login, Register } from "./auth";
const R: React.FC = () => {
  return (
    <Router>
      <Switch>
        <Route path="/login">
           <Login />
        </Route>
       <Route path="/register">
           <Register/>
        </Route>

       <Route path="/">
           <Home/>
        </Route>
      </Switch>
    </Router>
  );
};
export default R;

在v6 . *

import React from "react";
import { BrowserRouter as Router, Route, Routes } from "react-router-dom";
import { Home } from "./app";
import { Login, Register } from "./auth";
const R: React.FC = () => {
  return (
    <Router>
      <Routes>
        <Route path="/login" caseSensitive={false} element={<Login />} />
        <Route path="/register" caseSensitive={false} element={<Register />} />
        <Route path="/" caseSensitive={false} element={<Home />} />
      </Routes>
    </Router>
  );
};
export default R;

我也遇到了同样的问题，我在网上搜索了很多，但是我没有根据我的问题得到任何答案。

所以我卸载了react-router-dom的6版:

npm uninstall react-router-dom

并安装了react-router-dom 5.2.0版本:

npm install react-router-dom@5.2.0

如果你正在使用react-router-dom v6，看起来Switch已经被Routes取代了。