Question

我尝试使用react-router-dom 4.0.0库。但它发给我这个错误

未捕获的TypeError：无法读取属性＆＃39; location＆＃39;未定义的

似乎是browserHistore中的问题。在我使用react-router 2.x.x之前，一切都没问题。这是我的index.js

import 'babel-polyfill'
import React from 'react'
import { Router, hashHistory } from 'react-router-dom'
import { render } from 'react-dom'
import { Provider } from 'react-redux'
import { configureStore } from './store'
import { routes } from './routes'

const store = configureStore()

render(
  <Provider store={store}>
    <Router history={hashHistory} routes={routes} />
  </Provider>,
  document.getElementById('root')
)

这是我的路线

import React from 'react'
import { IndexRoute, Route } from 'react-router-dom'
import App from './containers/App'
import Main from './containers/Main'
import First from './containers/First'

export const routes = (
  <Route path='/' component={Main}>
    <Route path='/path' component={First} />
    <IndexRoute component={App} />
  </Route>
  )

同样对于服务器端表达我设置了这个get配置

app.get('*', function root(req, res) {
  res.sendFile(__dirname + '/index.html');
});

Answer 1

React Router v4是一个完整的重写，并且与您之前的版本不兼容，正如您在代码中所假设的那样。话虽如此，您不应期望能够升级到新的主要版本（V4）并让您的应用程序正常工作。您应该查看documentation或降级回V2 / 3。这里有一些代码可以让你从正确的方向开始

import 'babel-polyfill'
import React from 'react'
import { BrowserRouter as Router, Route } from 'react-router-dom'
import { render } from 'react-dom'
import { Provider } from 'react-redux'
import { configureStore } from './store'
import App from './containers/App'
import Main from './containers/Main'
import First from './containers/First'

const store = configureStore()

render(
  <Provider store={store}>
    <Router>
      <Route path='/' component={Main} />
      <Route path='/path' component={First} />
    </Router>
  </Provider>,
  document.getElementById('root')
)

Answer 2

Check the version of react-router-dom in package.json
If its version is greater than 4 then in your file import BrowserRouter :-
```
import { BrowserRouter as Router, Route } from 'react-router-dom'
```
else if its version is less than 4 then import Router :-
```
import { Router, Route } from 'react-router-dom'
```

Answer 3

在您的终端安装上， npm我的历史记录@ 4.7.2 并像这样编辑您的index.js文件

InnoDB

无法阅读物业＆＃39; location＆＃39;未定义的

3 个答案: