import ReducerRegistry from '../redux/ReducerRegistry'; import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from './actionTypes'; export interface IAppState { app?: Object|undefined; } ReducerRegistry.register('features/base/app', (state: IAppState = {}, action) => { switch (action.type) { case APP_WILL_MOUNT: { const { app } = action; if (state.app !== app) { return { ...state, app }; } break; } case APP_WILL_UNMOUNT: if (state.app === action.app) { return { ...state, app: undefined }; } break; } return state; });