Our final action creator is for clearing the posted question result. Let's implement this in one step:

export const clearPostedQuestionActionCreator: ActionCreator<
  PostedQuestionAction
> = () => {
  const postedQuestionAction: PostedQuestionAction = {
    type: 'PostedQuestion',
    result: undefined,
  };
  return postedQuestionAction;
};

This action creator is much simpler because it is synchronous – we simply return a PostedQuestion action with an undefined result property.

So, action creators are straightforward to implement but the type annotations are a little tricky, particularly when they are asynchronous.

Our Redux store is shaping up nicely now. Let's move on and create a reducer.