transaction.component.ts

...

@Component({
  selector: 'transaction',
  templateUrl: './transaction.html',
  styleUrls: ['./transaction.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class TransactionComponent implements OnChanges {

  @Input() model: Transaction;
  
  ...
  
  ngOnChanges() {
    if (this.trService.isInactive(this.model)) {
      this.ref.detach();
    }
  }
  
  ...
  
}