Angular abstract onDestroy calss

abstract-component.ts

import { Subject } from 'rxjs';

import { Injectable, OnDestroy } from '@angular/core';

@Injectable()
export class AbstractBasicComponent implements OnDestroy {
  protected destroy$ = new Subject();

  public ngOnDestroy(): void {
    this.destroy$.next();
    this.destroy$.complete();
  }

class Example extends AbstractBasicComponent
// ...
observable$.pipe(
  takeUntil(this.destroy$)
).subscribe()