Check internet connection in React Native app

App.js

// quick snippet to check the connection in your RN app
// dispatches an `setIsConnected` action every time the NetInfo changes (on/off network)

componentDidMount() {
  const dispatchConnected = isConnected => this.props.dispatch(setIsConnected(isConnected));

  NetInfo.isConnected.fetch().then().done(() => {
    NetInfo.isConnected.addEventListener('change', dispatchConnected);
  });
}