inject-epic-reducers

simple injection wrapper for reducers and epics in React

Installation

create your reducers

export const rootReducer = (asyncReducers) => combineReducers({
  reducer: reducer,
  ...asyncReducers
});

or with Redux-persist

export const rootReducer = (asyncReducers) => persistReducer(persistConfig, combineReducers({
   reducer: reducer,
  ...asyncReducers
}));

if using epics

const rootEpics = combineEpics(
  importedEpic,
  anotherEpic
)

export const epic$ = new BehaviorSubject(rootEpics);

export const rootEpic = (action$, store) =>
  epic$.mergeMap(epic =>
    epic(action$, store)
  );

Then configure your store

import rootReducer, { rootEpic, epic$ } from '../above';

const createStore = (initialState = {}) => {
  const middleware = [
    createEpicMiddleware(rootEpic)
  ];
  {...the regular stuff }
  
  const store = createReduxStore(
    rootReducer(),
    initialState,
    composeEnhancers(
      applyMiddleware(...middleware),
      ...enhancers,
    ),
  );
  
  // these are the important stuff, needed for adding reducers
  store.asyncReducer = {};
  store.rootReducers = rootReducer;
  // new epics if you use them
  store.epics = epic$;
};

exporting a reducer and/or epic

The package is looking for exports named epic and reducer, so your exported reduxer/epic must follow:

  export const reducer = someReducer;
  export const epic = combineEpics(localEpicOne, localEpicTwo);

How to use

Once configurations are in place, simply annotate your class with:

import { LoadReducer } from 'inject-epic-reducers';

@LoadReducer(()=> import(/* webpackChunkName: 'reducername' */ './path'), 'reducerKey')
export class MyClass extends React.Component {...stuff}

For usage with for example api calls check Injecting Dependencies Into Epics