/TypeScript/Is subscribing to a lot of events in ngonint bad

Is subscribing to a lot of events in ngonint bad

import { Subject } from "rxjs"
import { takeUntil } from "rxjs/operators"

@Component({
  moduleId: __moduleName,
  selector: "my-view",
  templateUrl: "../views/view-route.view.html"
})
export class ViewRouteComponent implements OnInit, OnDestroy {
  componentDestroyed$: Subject<boolean> = new Subject()

  constructor(private titleService: TitleService) {}

  ngOnInit() {
    this.titleService.emitter1$
      .pipe(takeUntil(this.componentDestroyed$))
      .subscribe((data: any) => { /* ... do something 1 */ })

    this.titleService.emitter2$
      .pipe(takeUntil(this.componentDestroyed$))
      .subscribe((data: any) => { /* ... do something 2 */ })

    //...

    this.titleService.emitterN$
      .pipe(takeUntil(this.componentDestroyed$))
      .subscribe((data: any) => { /* ... do something N */ })
  }

  ngOnDestroy() {
    this.componentDestroyed$.next(true)
    this.componentDestroyed$.complete()
  }
}

Source: stackoverflow.com

Is subscribing to a lot of events in ngonint bad

@Component({ ... })
export class SmartComponent implements OnInit, OnDestroy {
  private subscriptions = new Subscription();

  constructor(private heroService: HeroService) {
  }

  ngOnInit() {
    this.subscriptions.add(this.heroService.getHeroes().subscribe(heroes => this.heroes = heroes));
    this.subscriptions.add(/* another subscription */);
    this.subscriptions.add(/* and another subscription */);
    this.subscriptions.add(/* and so on */);
  }

  ngOnDestroy() {
    this.subscriptions.unsubscribe();
  }
}

Source: stackoverflow.com

Similar codes

0 vote144 views1 answer
Check if a user already exists firebase realtime database react native
TypeScript
0 vote135 views1 answer
Function to find the unique elements from two arrays
TypeScript
21 votes157 views3 answers
Check port windows
TypeScript
7 votes139 views2 answers
Loop an object properties in ts
TypeScript
3 votes152 views1 answer
Serenity.is disable row in grid
TypeScript
0 vote143 views1 answer
Typescript key values interface key from enum
TypeScript
0 vote150 views1 answer
Padding entre les elements css
TypeScript
0 vote168 views1 answer
Open dialog
TypeScript
0 vote143 views1 answer
Return tru if one of the objects in a aray has a fild match
TypeScript
0 vote145 views1 answer
Has apple distribution certificate installed but its private key
TypeScript