Nested redux reducers

It is perfectly fine to combine your nested reducers using combineReducers. But there is another pattern which is really handy: nested reducers.

const initialState = {
  user: null,
  organisation: null,
  token: null,
  cypher: null,
  someKey: null,
}

function authReducer(state = initialState, action) {
  switch (action.type) {
    case SET_ORGANISATION:
      return {...state, organisation: organisationReducer(state.organisation, action)}

    case SET_USER:
      return {...state, user: userReducer(state.user, action)}

    case SET_TOKEN:
      return {...state, token: action.token}

    default:
      return state
  }
}

In the above example, the authReducer can forward the action to organisationReducer and userReducer to update some part of its state.