# Additional Types

Some convenience types are included for the rare case where you do need to write types.

# Prefer typeof

In a lot of situations you can get the types using typescripts typeof keyword.

For example, if you want to get the type of an actionCreator:

type AddTodoActionCreator = typeof addTodo;

type ActionOf<TActionCreator extends ActionCreator<any, any, any>>

This can be used to determine the Action type by inspecting an action-creator:

type AddTodoAction = ActionOf<typeof addTodo>;

type Action<TType extends string, TPayload = undefined, TMeta = undefined>

Use this if you need to manually define the type of an action.

type AnyAction

Any action can be assigned to this type.

type ActionCreator<
    TType extends string,
    TAction extends Action<TType, any, any>,
    TParams extends any[] = any[]
>

Describes the type of an action creator. It is mostly for internal use.