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;
你必须先检查npm包的版本。
执行npm info react-router-dom version命令查看。
如果包版本为>= 6.0.0，则必须进行更改
import { BrowserRouter as Router, Switch, Route, Link } from "react-router-dom";
to
import { BrowserRouter as Router,Routes, Route, Link } from "react-router-dom";
也必须改变
<Route path="/home" component={Home} />
to
<Route path="/home" element={<Home/>} />
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>
);
}
在react-router-dom v6中，“Switch”被替换为路由“routes”。您需要更新从的导入
import { Switch, Route } from "react-router-dom";
to
import { Routes ,Route } from 'react-router-dom';
您还需要更新Route声明
<Route path="/" component={Home} />
to
<Route path='/' element={<Home/>} />
在react-router-dom中，你也不需要在Route声明中使用exact。
欲了解更多信息，请访问官方文档:
升级到react-router-dom v6
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;
