How to create timer in angular2

With rxjs 6.2.2 and Angular 6.1.7, I was getting an:

Observable.timer is not a function

error. This was resolved by replacing Observable.timer with timer:

import { timer, Subscription } from 'rxjs';

private myTimerSub: Subscription;    

ngOnInit(){    
    const ti = timer(2000,1000);    
    this.myTimerSub = ti.subscribe(t => {    
        console.log("Tick");    
    });    
}    

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

Set Timer and auto call service after certain time

 // Initialize from ngInit
    ngOnInit(): void {this.getNotifications();}
    
    getNotifications() {
        setInterval(() => {this.getNewNotifications();
        }, 60000);  // 60000 milliseconds interval 
    }
    getNewNotifications() {
        this.notifyService.getNewNotifications().subscribe(
            data => { // call back },
            error => { },
        );
    }

on the newest version of Angular (I work on 12.2.*) Observable.timer is not supported. You can use it with a bit change at @Abdulrahman Alsoghayer example.

import {Component} from '@angular/core';
import {timer} from 'rxjs';

@Component({
    selector: 'my-app',
    template: 'Ticks (every second) : {{ticks}}'
})
export class AppComponent {
  ticks =0;
  ngOnInit(){
    let timer$ = timer(2000,1000);
    timer$.subscribe(t=>this.ticks = t);
  }
}