Here is part of a function I’ve written to add actions to a Redux store:

  const dispatch = useDispatch<AppDispatch>(); // typed action dispatcher
  const sliceActions = customSlice.actions // get the action callbacks from the custom store slice
  let dispatchActions: any = {} // return object, dispatch functions mapped to custom action names
  for (let action in sliceActions) {
    const cb = sliceActions[action] // type: void | Redux action creator types
    dispatchActions[action] = (input?: any) => { // assign a callback function to each key, this callback invokes the dispatcher on cb
      if (input) {
        return dispatch(cb({ input }))
      }
      return dispatch(cb())
    }
  }

This works when run, but TypeScript shows an error on the cb function calls which can have the void type, saying Type 'void' has no call signatures.

If I change the type assertion for cb to const cb = sliceActions[action] as Function or as any, the error goes away.

Why is TypeScript flagging the void type as having no call signatures in the first place? And will the type assertion as Function on a callback cause any other problems?