reducer must return immutable, how to handle js immutable types?

[elaijuh]

say i have a state like this:

{ isFetching: true, data: {foo: 'foo', bar: 'bar'}}

so how to handle in isFetching reducer?

[mehiel]

I think I have a similar case with redux-thunk.
Can thunk work with redux-immutablejs? Even if I set enforceImmutable to false it seems to ignore the thunk middleware and just set the returned function as the new state.

[tonyxiao]

@elaijuh you can pass in false to the enforceImmutable key. Alternatively you can use this snippet

export const createReducer = (initialState, handlers, constructor) => {
  const enforceImmutable = Immutable.Iterable.isIterable(initialState)
  return _createReducer(initialState, handlers, enforceImmutable, constructor)
}

@indexiatech would be great if you could review.