小编Jam*_*lda的帖子

我正在尝试在我的reactjs应用程序中应用redux.由于这些错误,我无法继续:

我确信我已经安装了所需的所有依赖项.这是我的package.json的相关部分

"dependencies": {
   "react-redux": "^5.0.6",
   "redux": "^3.7.2",
   "redux-logger": "^3.0.6",
   "redux-promise": "^0.5.3",
   "redux-thunk": "^2.2.0",
}

这是我实现redux的index.js的一部分

import { createStore, applyMiddleware } from 'redux';
import { Provider } from 'react-redux';
import thunkMiddleware from 'redux-thunk';
import createLogger from 'redux-logger';
import reducers from './reducers';

const logger = createLogger();
const store = createStore(reducers,
    applyMiddleware(
        thunkMiddleware, logger
    )
)

ReactDOM.render(
    <Provider store={store}>
        <App />
    </Provider>,
    document.getElementById('root')
);

可编辑的示例代码如何在以下代码中使用航点 航点是否有助于绘制我在数据库中更新的方式，无论 ponits 将基于我更新的点

const DirectionsService = new google.maps.DirectionsService();
                 const  DirectionsDisplay = new google.maps.DirectionsRenderer({suppressMarkers: true},{strokeColor:"#4a4a4a"});

      DirectionsService.route({

        origin: new google.maps.LatLng(this.state.orgin.latitude ,this.state.orgin.longitude),
         destination: new google.maps.LatLng(this.state.destination.latitude ,this.state.destination.longitude),
          travelMode: google.maps.TravelMode.DRIVING,

      }, 
       (result, status) => {
        if (status === google.maps.DirectionsStatus.OK) {
          this.setState({
            directions: result,
          });
        } else {
          console.error(`error fetching directions ${result}`);
        }
      });

            }).catch(function (err) {

            });

    }

  })

)(props =>
  <GoogleMap
    defaultZoom={50}>
     <DirectionsRenderer directions={props.directions}   />

  < Marker

  position={{  lat:props.delivery!=undefined?props.delivery.latitude:null, lng:  props.delivery!=undefined?props.delivery.longitude:null }} />

  </GoogleMap>

);
    return (
      <MapWithADirectionsRenderer />
    )
  }