Redux shared reducer data example

sharedReducerData.js

import {combineReducers} from "redux";
import reduceReducers from "reduce-reducers";


import reducerA from "./reducerA";
import reducerB from "./reducerB";
import specialCaseHandler from "./specialCaseHandler";


const combinedReducer = combineReducers({
    a : reducerA,
    b : reducerB
});

function globalSharedBehaviorReducer(state, action) {
    switch(action.type) {
        case SOME_SPECIFIC_ACTION : {
		    const newA = specialCaseHandler(state.a, state.b);
		    return {
		        ...state,
		        a : newA
		    };
        }    
    }
}

const rootReducer = reduceReducers(combinedReducer, globalSharedBehaviorReducer);