oftype-with-string.ts

export class MyEffects {
  constructor(private readonly actions$: Actions<ActionsUnion>) {}
  
  @Effect
  login$ = this.actions$.pipe(
    // ensures type safety only when ActionsUnion is provided
    ofType(login.type), 
    ...
  )
  
  @Effect
  login2$ = this.actions$.pipe(
    // explicitly provided generic works as well 
    ofType<ReturnType<typeof login>>(login.type), 
  )
}