警告:失败的道具类型:道具`store`在`Provider`中标记为必需,但其值为'undefined`.在提供者

Question

如何在react-redux项目错误屏幕截图中解决此错误 警告:失败的道具类型:道具store标记为必需Provider,但其值为undefined.在提供者

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import './index.css';
import SignUp from './Components/SignUp'
import SignIn from './Components/SignIn'
import Home from './Components/Home'
import { Router, Route, hashHistory, IndexRoute, browserHistory } from 'react-router';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
import {firebaseApp} from './Database/firebaseApp'
import {Provider} from 'react-redux'
import {store} from './Store/Store'
import {logUser} from './Store/Actions'

ReactDOM.render(
  <MuiThemeProvider>
    <Provider store={store}>
      <Router history={browserHistory} >

        <Route path="/signup" component={SignUp} ></Route>
        <Route path="/signin" component={SignIn} ></Route>
        <Route path="/home" component={Home} ></Route>

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

//在下面存储代码

import { createStore, applyMiddleware,combineReducers } from 'redux';
import thunk from 'redux-thunk';
import {createLogger} from "redux-logger";
//import logger from 'redux-logger'

//import rootReducer from './Reducers/rootReducer'
import {authReducer} from "./Reducers/authReducer"

const rootReducer = combineReducers({
    authReducer
})
const logger = createLogger();

let store = createStore(rootReducer, applyMiddleware(thunk, logger) );

export default store;

Answer 1

您导出store为默认值:export default store;

您需要以这种方式导入它: import store from './Store/Store'

出口有两种:

• export myVar必须用{和导入}
• export default myVar必须进口没有{和}

这对于从文件导出/导入多个变量/函数很有用:

// file.js
export a;
export b;
export default c;

//otherfile.js
import c, { a , b} from './file';