Question

我正在创建一个简单的React应用程序，并且在实现“路由”时出现以下错误：

TypeError：无法读取react中未定义的属性“位置”。

App.js：

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
import Header from "./components/header";
import Home from "./components/Home";
import About from "./components/About";
import Contact from "./components/Contact";
import { Router, Route} from 'react-router'

class App extends Component {
  render() {
    return (
      <div className="App">
      <Header />

   <Router>
      <Route path = "/" component = {App}>
         <Route path = "home" component = {Home} />
         <Route path = "about" component = {About} />
         <Route path = "contact" component = {Contact} />
      </Route>
   </Router>
        <header className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <p>

            Edit <code>src/App.js</code> and save to reload.
          </p>
          <a  className="App-link"  href="https://reactjs.org"target="_blank"  rel="noopener noreferrer">
            Learn React
          </a>
        </header>
      </div>
    );
  }
}

export default App;

我在这里想念什么？

Answer 1

这里的问题似乎与路由器包的导入有关。

安装：npm install --save react-router-dom

将包导入到您的App.js中为：

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

现在将您的App.js render()函数修改为-

 return (
  <BrowseRouter>
      <div className="App">
      <Header />

        <Route exact path = "/" component = {Home} />
        <Route path = "about" component = {About} />
        <Route path = "contact" component = {Contact} />


      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
        <p>

          Edit <code>src/App.js</code> and save to reload.
        </p>
        <a  className="App-link"  href="https://reactjs.org"target="_blank"  rel="noopener noreferrer">
          Learn React
        </a>
      </header>
    </div>
  </BrowseRouter>
);

TypeError：无法在react中读取未定义的属性'location'

1 个答案: