where is the openCursor from 1.6.3

[EliseoPlunker]

I has work with JsStore two year ago (ver. 1.6.3). Yes it is and old project that I want to upgrade to 4.2.6. Really I don't know if has any sense use cursors but this are dissapear in this new versions. There're a plan to implements or some work-around about it?
Thanks for your job and attention

[ujjwalguptaofficial]

Could you paste sample of your code @EliseoPlunker ? I am not able to recall if JsStore provided to use cursor .

[EliseoPlunker]

My god, sorry. You're correct. I manage the cursor using directly the indexedDB. Apologies and thanks for your time. I write the code below for if someone consider interesting (it's a simple extension of the example in mozilla page)

I needed show a loading with percent in a really large table. In desktop there're no problem, but some mobile spend a large time (8-10 seconds) and I don't wanted to use simply a rotating icon

   //in Angular I has a service dbsService
   public open(dbname:string): Observable<any> {
     return new Observable((observer: any) => {
       let request = indexedDB.open(dbname);

       request.onsuccess = () => {
         observer.next(request.result);
         observer.complete();
       }
       request.onerror = () => {
         alert(request.error);
         return throwError(request.error);
       }
     });
   }

   //and, use in a component
      this.data=[];
      this.dbsService.openCursor('indexedDB').subscribe((db: any) => {
        let tx = db.transaction("Table1", "readonly");
        let store = tx.objectStore("Table1");
        let index = store.index("index1");
        let request = index.openCursor(IDBKeyRange.lowerBound(lastItemID, true));
        request.onsuccess = () => {
          let cursor = request.result;
          if (cursor) {
            this.data.push({ ID: cursor.value.ID, Name: cursor.value.Name});
            let porc=Math.floor(cursor.value.ID*100/lastIndexID);
            console.log("starting... "+porc+"%");
            cursor.continue();
          } else {
            db.close();
            return of(true);
          }
        };
        db.onerror = (e: any) => {
          db.close();
          return throwError(e.target.error);
        }
      })