pdf-reader-web/config/configureStore.js

import { createStore, applyMiddleware } from 'redux';
import createSagaMiddleware from 'redux-saga';
import { composeWithDevTools } from 'redux-devtools-extension';

import rootReducer from '../redux/reducers';
import rootSaga from '../redux/sagas';

const sagaMiddleware = createSagaMiddleware();

const bindMiddleware = (middleware) => {
  if (process.env.NODE_ENV !== 'production') {
    return composeWithDevTools(applyMiddleware(...middleware));
  }
  return applyMiddleware(...middleware);
};

const configureStore = (initialState = {}) => {
  const store = createStore(
    rootReducer,
    initialState,
    bindMiddleware([sagaMiddleware]),
  );

  store.runSagaTask = () => {
    store.sagaTask = sagaMiddleware.run(rootSaga);
  };

  store.runSagaTask();
  return store;
};

export default configureStore;