values function in ydn-db not working in safari and iOS9

The get,values,count function of ydn db is not working in safari and ios9.

I have tried to reopen the db and then access it but still no luck.

  db_mob_audit = new ydn.db.Storage('idb_mob_auditor', schema);
  db_mob_audit.values('DomainInfo',key_range,9999).done(function (tempDdata) {
            if (tempDdata.length > 0) {}
  });

After doing this i get error "can't find variable window-ydn db".