TYPESCRIPT

promise to observable typescript

import { from } from 'rxjs';
const observable = from(promise);

typescript function return type observable

//in the service file
getResults():Observable<any[]>{
        return this.httpClient.get<any>('/URL');
      }

//in the ts file
$observableResults = this.thatService.service.get()

//in the template

<div *ngFor='thing of ($observableResults | async)'>
  {{thing.something}}
</div>