yarn add redux-online-store-enhancer

import onlineStoreEnhancer, { onlineReducer } from 'redux-online-store-enhancer';
 
const reducer = {
  online: onlineReducer,
};
 
const middleware = [];
const store = createStore(
  reducer,
  compose(
    applyMiddleware(...middleware),
    onlineStoreEnhancer()
  )
);
 
// get from state directly
const { online } = store.getState();
 
// reselect
const selectOffline = (state) => state.online;

import { NetInfo } from 'react-native';
import onlineStoreEnhancer, { onlineReducer } from 'redux-online-store-enhancer';
 
const reducer = {
  online: onlineReducer,
};
 
const middleware = [];
const store = createStore(
  reducer,
  compose(
    applyMiddleware(...middleware),
    onlineStoreEnhancer(NetInfo)
  )
);
 
// get from state directly
const { online } = store.getState();
 
// reselect
const selectOffline = (state) => state.online;