CODEWITHSUNDEEP
angulartypescriptrxjsangular10
Miguel Moura
Miguel Moura

Reputation: 39384

Console.Log is not executed when inside the RXJS Tap operator

I have the following observables:

this.authenticationService.isSignedIn() -> Observable<Boolean>

this.user$ -> Observable<UserModel>

I need to check a condition based on both so I tried:

zip(this.authenticationService.isSignedIn(), this.user$).pipe(
  map(([isSignedIn, user]: [boolean, UserModel]) => isSignedIn && user.claims))
);

Because I am getting an unexpected result I tried to check things out using:

zip(this.authenticationService.isSignedIn(), this.user$).pipe(
  tap(([isSignedIn, user]: [boolean, UserModel]) => {
    console.log(isSignedIn);
    console.log(user);
  })
);

But the two console.log are not executed. What am I missing?

Upvotes: 2

Views: 2655

Answers (1)

Andrei
Andrei

Reputation: 12036

you could be missing a subscribtion. All rxjs things are lazy and won't be running untill a subscription is done. if you don't need to handle the result somehow else except for your tap operator, just add .subscribe() in the end

zip(...).pipe(
  tap(...)
).subscribe();

Upvotes: 5

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