IndexedDB: limit selected fields of retrieving object

Question

While getting object(s) from indexeddb is it possible to limit a set of fields being retrieved (not to fetch a whole data piece)? I believe an actual task when you have large objects in store, but need only small part of data for a particular operation.

Answer 1

No, according to the IndexedDB spec you'll always get the full object, see: 3.4.2 Object Store Retrieval Operation.

Answer 2

as a workaround it's possible to define a key on those fields and then do getAllKeys