redux的@connect产生错误'connect.js:129Uncaught TypeError:无法读取未定义的属性‘存储’

Question

当运行我的应用程序(成功地与webpack+babel捆绑并支持装饰器)时，控制台显示：

'connect.js:129 Uncaught TypeError: Cannot read property 'store' of undefined'

屏幕上没有其他任何东西显示所有的包都是最新的。

有什么想法吗？谢谢。

app.js：

import React from 'react'
import ReactDOM from 'react-dom'
import Main from './components/main.jsx'

import { combineReducers } from 'redux'
import { Provider, connect } from 'react-redux'
import { createStore } from 'redux'

import * as mainActions from './actions/main_a'
import * as reducers from './reducers/main_r'

const reducer = combineReducers(reducers)
const store = createStore(reducer)

let mapDispatchToProps = (dispatch) => ({
    fireTestAction: () => dispatch(mainActions.testAction( true ))
});

let mapStateToProps = () => ({})

@connect(mapStateToProps, mapDispatchToProps)
export default class App extends React.Component{
    render() {
        return (
            <Provider store={store}>
                <Main txt='Fire test action' action={ fireTestAction} />
            </Provider>,
                document.getElementById('app')
        )
    }
}

var app = new App;
app.render();

package.json：

"devDependencies": {
    "babel": "^6.5.2",
    "babel-core": "^6.10.4",
    "babel-loader": "^6.2.4",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-es2015": "^6.9.0",
    "babel-preset-react": "^6.11.1",
    "babel-preset-stage-0": "^6.5.0",
    "gulp": "^3.9.1",
    "gulp-exec": "^2.1.2",
    "gulp-nodemon": "^2.1.0",
    "gulp-shell": "^0.5.2",
    "gulp-webpack": "^1.5.0",
    "react-hot-loader": "^1.3.0",
    "redux-devtools": "^3.3.1",
    "webpack": "^1.13.1",
    "webpack-dev-server": "^1.14.1"
  },
  "dependencies": {
    "express": "^4.14.0",
    "react": "^15.1.0",
    "react-dom": "^15.1.0",
    "react-redux": "^4.4.5",
    "redux": "^3.5.2"
  }
}

Answer 1

这是因为您在使用提供程序的同一组件上使用connect。

<Provider store> 使Redux存储对于下面组件层次结构中的connect()调用可用。通常，如果不在<Provider>中包装根组件，就不能使用connect()。

https://github.com/reactjs/react-redux/blob/master/docs/api.md#provider-store

您应该在<Main>组件上使用connect。

编辑：

另外，如果App组件是您的入口点，则不需要导出它，也不需要这样做：

var app = new App; app.render();。

相反，使用ReactDOM来呈现应用程序。比如：

ReactDOM.render(
 <Provider store={store}>
  <Main txt='Fire test action' action={ fireTestAction} />
 </Provider>,
 document.getElementById('app')
)

Answer 2

老问题，但我遇到了这个错误，因为我试图通过调用MyComponent: React.ComponentClass来从给定的new MyComponent(props)创建组件，这不是创建React组件的正确方式。正确的方法是调用React.createElement(MyComponent, props)