redux-observable RxJS , . Epics , Epic, function (action$, store). , Epic , Epics, .
, rootEpic combineEpics(). Epics - , , (action$, store)!
:
export const rootEpic = (action$, store) =>
combineEpics(epic1, epic2, epic3)(action$, store)
.do({ error: err => console.error(err) });
, .catch() , .catch() Observable , . ( ), .do() - , (, ), .
Composing Epics , , , .
.catch() RFC .