我不知道为什么我得到这个错误,我在任何地方都找不到答案。我已经卸载了react-router-dom包并重新安装了它,但它仍然告诉我交换模块没有从react-router-dom导出。这是我的代码。

我得到的错误是:

试图导入错误:“Switch”没有从“react-router-dom”中导出。

Code

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, Switch, Route, Link } from 'react-router-dom';

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

export default App;

当前回答

我是这样解决的:

yarn add react-router-dom@5,3,0

其他回答

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>

我可以通过将Switch更改为Routes来修复它。 所以你应该有这样的东西:

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

你还需要把import从Switch改成Routes:

import { Routes, Route } from "react-router-dom";

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>

<Switch>替换为<Routes>

之前:

import { Route, Switch} from 'react-router'

<Router>
    <Switch>
        <Route />
        <Route />
    </Switch>
</Router>

Now:

import { Route, Routes} from 'react-router'

<Router>
    <Routes>
        <Route />
        <Route />
    </Routes>
</Router>

只需使用路由而不是交换机。