rxjs - Subscribe is deprecated: Use an observer instead of an error callback

Question

When I run the linter it says:

subscribe is deprecated: Use an observer instead of an error callback

Code (from an angular 7 app with angular-cli):

    this.userService.updateUser(data).pipe(
       tap(() => {bla bla bla})
    ).subscribe(
       this.handleUpdateResponse.bind(this),
       this.handleError.bind(this)
    );

Don't know exactly what should I use and how...

Thanks!

Answer 1

subscribe isn't deprecated, only the variant you're using is deprecated. In the future, subscribe will only take one argument: either the next handler (a function) or an observer object.

So in your case you should use:

.subscribe({
   next: this.handleUpdateResponse.bind(this),
   error: this.handleError.bind(this)
});

See these GitHub issues:

• https://github.com/ReactiveX/rxjs/pull/4202

• https://github.com/ReactiveX/rxjs/issues/4159