notificationHandler.js

import { Notifications } from 'expo';
import { AppState, Platform } from 'react-native';
import { Component } from 'react';

const isIos = Platform.OS === 'ios';

export class NotificationHandler extends Component {
  state = {
    appState: AppState.current
  };

  handleNotification = async (notification = {}) => {
    console.log('incoming push messsage', notification);

    const { origin, data = {} } = notification;
    const isAppActive = this.state.appState === 'active';



    //ios does not show push notification when app in foreground
    if (isIos && isAppActive) {
      return //do something appropriate as the app is in foreground
    }


    if (origin === 'selected') {
      //user pressed the notification, do something based on that.
    }
  };

  handleAppState = nextAppState => {
    this.setState({ appState: nextAppState });
  };

  async componentWillUnmount () {
    (await this._notificationSubscription) &&
    this._notificationSubscription.remove();
    AppState.removeEventListener('change', this.handleAppState);
  }

  async componentDidMount () {
    this._notificationSubscription = await Notifications.addListener(
      this.handleNotification
    );
    AppState.addEventListener('change', this.handleAppState);
  }

  render () {
    return null;
  }
}

export default NotificationHandler;

yeah, same I'm not able to run this code.Could you please provide example project link.