IndexedDB is fine - just use some wrapped that makes it easier to work with. Our current SQLite implementation actually stores the underlying data inside Indexe

IndexedDB is fine - just use some wrapped that makes it easier to work with. Our current SQLite implementation actually stores the underlying data inside IndexedDB - mostly due to a lack of better options (but that's busy changing with OPFS). The difficult parts are mostly related to keeping the local data in sync with the server, whether that uses SQLite, IndexedDB or some other database.