reactjs – React.createElement：type无效 – 期望一个字符串,但得到：object

我今天刚刚升级到Webpack 2.2并且已经阅读了他们的指南,这些指南似乎仍在进行中.

我在设置我的应用程序以使用webpack-dev-server和热模块重新加载时遇到了困难.

我通过webpack文档关注的指南在这里,但我不得不修改它以使用开发/生产应用程序.

https://webpack.js.org/guides/hmr-react/

我得到的两个错误如下……

Uncaught Error: _registerComponent(...): Target container is not a DOM element.
    at invariant (eval at <anonymous> (index.js:2),<anonymous>:44:15)
    at Object._renderNewRootComponent (eval at <anonymous> (index.js:64),<anonymous>:311:44)
    at Object._renderSubtreeIntoContainer (eval at <anonymous> (index.js:64),<anonymous>:401:32)
    at render (eval at <anonymous> (index.js:64),<anonymous>:422:23)
    at hotRenderer (eval at <anonymous> (index.js:73),<anonymous>:41:28)
    at eval (eval at <anonymous> (index.js:73),<anonymous>:47:5)
    at eval (eval at <anonymous> (index.js:73),<anonymous>:54:5)
    at Object.<anonymous> (index.js:73)
    at e (index.js:1)
    at Object.<anonymous> (index.js:146)

和

Warning: React.createElement: type is invalid -- expected a string (for built-in components) 
or a class/function (for composite components) but got: object.
printWarning    @   warning.js?8a56:36
warning @   warning.js?8a56:60
createElement   @   ReactElementValidator.js?a599:171
hotRenderer @   index.js?2018:30
(anonymous) @   index.js?2018:35
(anonymous) @   index.js?2018:25
(anonymous) @   index.js:73
e   @   index.js:1
(anonymous) @   index.js:146
e   @   index.js:1
(anonymous) @   index.js:1
(anonymous) @   index.js:1

我相信问题可能在于我的app文件正在导出一个由Redux Provider组成的组件,其中包含一个React Router Router.

以下是两个罪魁祸首文件：

index.js

import './lib/styles.css'
import React from 'react'
import { render } from 'react-dom'

import App from './App'

if (process.env.NODE_ENV === 'development') {
  const { AppContainer } = require('react-hot-loader')
  const hotRender = (Component) => {
    render(
      <AppContainer>
        <Component/>
      </AppContainer>,document.getElementById('root')
    )
  }

  hotRender(App)

  if (module.hot) {
    module.hot.accept('./App',() => {
      const NewApp = require('./App').default
      hotRender(NewApp)
    })
  }
} else {
  render(App,document.getElementById('app'))
}

App.js

import React from 'react'
import { Provider } from 'react-redux'
import { createStore } from 'redux'
import store from './redux/store'

import { Router,hashHistory } from 'react-router'
import routes from './routes'

let s = createStore(store,process.env.NODE_ENV === 'development' ? (
    window.__REDUX_DEVTOOLS_EXTENSION__ &&
    window.__REDUX_DEVTOOLS_EXTENSION__()
  ) : null
)

const App = () => (
  <Provider store={s}>
    <Router history={hashHistory} routes={routes} />
  </Provider>
)


export default App

如果您想检查具有更改的整个PR,那将是非常棒的！代码位于：https://github.com/awitherow/aether/pull/64/files

我为一些滑入PR的CSS更改道歉,但我在这里完成的所有Webpack 2.2及更高版本的升级都是潜在的！

编辑

我尝试了一些修复,简单的修复…但它们没有解决任何问题.

> X将应用程序包装在div中,以便它会以某种方式认为它是一个DOM元素.
> X导出App作为扩展Component的类

您使用的是哪个版本的React Router？我在控制台中也收到了Warning：React.createElement错误,但是从版本3.0.2切换到4.0.0-alpha.6预发布版本为我摆脱了它.