How to get access of the state tree in effects? (@ngrx/effects 2.x)

Question

I am updating @ngrx/effects from 1.x to 2.x

In 1.x I have access of state tree in effect:

  constructor(private updates$: StateUpdates<AppState>) {}    @Effect() bar$ = this.updates$     .whenAction(Actions.FOO)     .map(obj => obj.state.user.isCool)     .distinctUntilChanged()     .filter(x => x)     .map(() => ({ type: Actions.BAR })); 

Now in 2.x, it only gives me action. Is there still a way to get access of the state tree? Or should I avoid using like this because it is not a good practice?

  constructor(private actions$: Actions) {}    @Effect() bar$ = this.actions$     .ofType(ActionTypes.FOO)     .map((obj: any) => {       console.log(obj);              // here is action only       return obj.state.user.isCool   // so it is wrong here     })     .distinctUntilChanged()     .filter(x => x)     .map(() => ({ type: ActionTypes.BAR })); 

Answer 1

Another way is using .withLatestFrom(this.store). So the complete code is:

  constructor(     private actions$: Actions,     private store: Store<AppState>   ) {}   @Effect() bar$ = this.actions$     .ofType(ActionTypes.FOO)     .withLatestFrom(this.store, (action, state) => state.user.isCool)     .distinctUntilChanged()     .filter(x => x)     .map(() => ({ type: ActionTypes.BAR }));