JAVASCRIPT

angular async

@Component({
  selector: 'async-observable-pipe',
  template: '<div><code>observable|async</code>: Time: {{ time | async }}</div>'
})
export class AsyncObservablePipeComponent {
  time = new Observable<string>((observer: Observer<string>) => {
    setInterval(() => observer.next(new Date().toString()), 1000);
  });
}

async in angular typescript

async initializeDepartmentList(): Promise<void> {
    const data: DepartmentModel[] = await this.userService.GetAllIndividualDepartment().toPromise();
    this.displayIndividualDepartmentList = data;
    this.currentDisplayDepartment = this.displayIndividualDepartmentList[0].department_id;
  }
  
  
  async ngOnInit(): Promise<void> {

    await this.initializeDepartmentList();
.
.
}