Using NetInfo middleware in React Native with Redux

I want to test in all components whether the user has connection to the internet.

I could use NetInfo in each component, but since I am using redux, I thought it could be done easier with a middleware(?).

I have used

import { createStore, applyMiddleware } from 'redux';   

const netInfo = store => next => action => {
  const listener = (isConnected) => {
    store.dispatch({
      type: types.NET_INFO_CHANGED,
      isConnected,
    });
  };

  NetInfo.isConnected.addEventListener('change', listener);
  NetInfo.isConnected.fetch().then(listener);

  return next(action);  
};

const store = createStore(AppReducer, applyMiddleware(netInfo));

where AppReducer is just combineReducers(navReducer, netInfoReducer, ...).

It does seem to work, but I am really worried if this performs well enough. It seems it is only run once, but I am never removing the listener or anything.

Is this how you normally would do if you want to populate all components with an isConnected variable?

via Jamgreen