javascript - React Router 仅在刷新页面后才起作用

Question

我对 react 有点陌生，我正面临路由器问题。当我直接在浏览器上输入 URL 时路由有效，但是当我单击链接时，浏览器上的 URL 会发生变化(例如 http://localhost:8080/contactus)，但内容不会更新(但是如果我刷新，它就会更新)。

这是我的 github 仓库: https://github.com/Arefaat18/Project

这是我的 MainComponent.js

import React, { Component } from 'react';
import {TransitionGroup, CSSTransition} from 'react-transition-group';
import {Switch, Route, Redirect,withRouter,BrowserRouter as Router} from 'react-router-dom';
import Header from './HeaderComponent';
import ContactUs from './ContactUsComponent';
import AboutUs from './AboutUsComponent';
import Home from './HomeComponent.js';
import {connect} from 'react-redux';  

class Main extends Component {

  constructor(props) {
    super(props);

  }

  
  
  render() {

    return (
      <div>
        <Router>
        <Header />
        <TransitionGroup>
          <CSSTransition classNames="page" timeout={300}>
            <Switch>
              <Route path="/home" component={Home} />
              <Route exact path = "/contactus" component ={ContactUs} />
              <Route exact path = "/aboutus" component ={AboutUs} />
              <Redirect to="/home" />
            </Switch>
          </CSSTransition>
        </TransitionGroup>
        </Router>
        </div>
    );
  }
}

export default withRouter(Main);

这是我的 App.js 文件

import React, { Component } from 'react';
import Main from './components/MainComponent';
import './App.css';
import {BrowserRouter} from 'react-router-dom';
import {Provider} from 'react-redux';
import {ConfigureStore} from './components/configureStore';

const store = ConfigureStore();

class App extends Component {


  render() {
    return (
      <Provider store={store}>
        <BrowserRouter>
          <div className="App">
            <Main />
          </div>
        </BrowserRouter>
      </Provider>
    );
  }
}

export default App;

这里是相关的依赖

"react": "^17.0.1",
    "react-bootstrap": "^1.4.0",
    "react-dom": "^17.0.1",
    "react-redux": "^7.2.1",
    "react-redux-form": "^1.16.14",
    "react-router-dom": "^5.2.0",
    "react-scripts": "3.4.4",

这是我的ContactUsComponent，其他组件只是文本不同而已

import React, { Component } from 'react';

class ContactUs extends Component {

    render(){
        console.log("RENDER");
        return (
            <div>
                <h1> Contact Us</h1>
            </div>
        );
    }
}

export default ContactUs;

提前致谢。

Answer 1

好吧，我也遇到了同样的问题，但在 React 18 中，我们在 index.js 文件中的组件默认包装在 React Strict 模式下

像这样:

<React.StrictMode>
<App/>
</React.StrictMode>

我删除了 React strict Mode 标签，然后它对我来说工作得很好