反应路由器 v^4.0.0 未捕获的类型错误:无法读取未定义的属性“位置" [英] react router v^4.0.0 Uncaught TypeError: Cannot read property 'location' of undefined

问题描述

我在使用 react 路由器时遇到了一些问题(我使用的是 ^4.0.0 版).

这是我的 index.js

从'react'导入React；从 'react-dom' 导入 ReactDOM；从'./App'导入应用程序；导入'./index.css';从反应路由器"导入{路由器，路由，链接，浏览器历史}；ReactDOM.render(<路由器历史={browserHistory} ><Route path="/" component={App}/></路由器>,document.getElementById('root'));

App.js 就是任何东西.我在这里发布基本的，因为这不是问题(我相信)

import React, { Component } from 'react';从'./logo.svg'导入标志；导入'./App.css';类 App 扩展组件 {使成为() {返回 (<div className="应用程序"><div className="App-header"><img src={logo} className="App-logo" alt="logo"/><h2>欢迎反应</h2>

<p className="App-intro">首先，编辑 src/App.js;并保存以重新加载.</p>

);}}导出默认应用程序；

这就是我检查控制台日志时发生的情况

Router.js:43 未捕获的类型错误:无法读取未定义的属性位置"在新路由器 (Router.js:43)在 ReactCompositeComponent.js:295在 measureLifeCyclePerf (ReactCompositeComponent.js:75)在 ReactCompositeComponentWrapper._constructComponentWithoutOwner (ReactCompositeComponent.js:294)在 ReactCompositeComponentWrapper._constructComponent (ReactCompositeComponent.js:280)在 ReactCompositeComponentWrapper.mountComponent (ReactCompositeComponent.js:188)在 Object.mountComponent (ReactReconciler.js:46)在 ReactCompositeComponentWrapper.performInitialMount (ReactCompositeComponent.js:371)在 ReactCompositeComponentWrapper.mountComponent (ReactCompositeComponent.js:258)在 Object.mountComponent (ReactReconciler.js:46)

哦，这是 package.json 以防万一

<代码>{"name": "teste2",版本":0.1.0"，私人":真的，依赖关系":{反应":^ 15.4.2"，"react-dom": "^15.4.2",反应路由器":^ 4.0.0"},开发依赖":{反应脚本":0.9.5"},脚本":{开始":反应脚本开始"，"build": "react-scripts build","test": "反应脚本测试 --env=jsdom",弹出":反应脚本弹出"}}

我一直在其他地方检查这个，但我没有找到解决它的方法.

非常感谢你们的耐心和帮助！！

解决方案

你做错了几件事.

1. 首先，browserHistory 在 V4 中不是一个东西，所以你可以删除它.

2. 其次，您要从 react-router 导入所有内容，它应该是 react-router-dom.

3. 第三，react-router-dom 不导出 Router，而是导出一个 BrowserRouter 所以你需要import { BrowserRouter as Router } from 'react-router-dom.

看起来您刚刚使用了 V3 应用并希望它能够与 v4 一起使用，这不是一个好主意.

I've been having some trouble with react router (i'm using version^4.0.0).

this is my index.js

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import './index.css';
import { Router, Route, Link, browserHistory } from 'react-router';


ReactDOM.render(
  <Router history={browserHistory} >
    <Route path="/" component={App} />

  </Router>,
  document.getElementById('root')
);

the App.js is just anything. i'm posting the basic one here, cause it's not the problem (i believe)

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';

class App extends Component {
  render() {
    return (
      <div className="App">
        <div className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h2>Welcome to React</h2>
        </div>
        <p className="App-intro">
          To get started, edit <code>src/App.js</code> and save to reload.
        </p>
      </div>
    );
  }
}

export default App;

and this is what happens when i check the console log

Router.js:43 Uncaught TypeError: Cannot read property 'location' of undefined
    at new Router (Router.js:43)
    at ReactCompositeComponent.js:295
    at measureLifeCyclePerf (ReactCompositeComponent.js:75)
    at ReactCompositeComponentWrapper._constructComponentWithoutOwner (ReactCompositeComponent.js:294)
    at ReactCompositeComponentWrapper._constructComponent (ReactCompositeComponent.js:280)
    at ReactCompositeComponentWrapper.mountComponent (ReactCompositeComponent.js:188)
    at Object.mountComponent (ReactReconciler.js:46)
    at ReactCompositeComponentWrapper.performInitialMount (ReactCompositeComponent.js:371)
    at ReactCompositeComponentWrapper.mountComponent (ReactCompositeComponent.js:258)
    at Object.mountComponent (ReactReconciler.js:46)

oh, and this is the package.json just in case

{
  "name": "teste2",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^15.4.2",
    "react-dom": "^15.4.2",
    "react-router": "^4.0.0"
  },
  "devDependencies": {
    "react-scripts": "0.9.5"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }
}

i've been checking this on other places, but i didn't find a way to solve it.

Thank you guys very much for your patience and help!!

解决方案

You're doing a few things wrong.

1. First, browserHistory isn't a thing in V4, so you can remove that.

2. Second, you're importing everything from react-router, it should be react-router-dom.

3. Third, react-router-dom doesn't export a Router, instead, it exports a BrowserRouter so you need to import { BrowserRouter as Router } from 'react-router-dom.

Looks like you just took your V3 app and expected it to work with v4, which isn't a great idea.

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