[hunterb123]

RxDB does this. Recently PouchDB integration is more abstracted to swap it out but it's still the best client side database. RxDB syncs with GraphQL and Pouch/CouchDBs

There's WatermelonDB which uses IndexedDB on web and SQLite on native, it's nice for syncing to custom backends.

There's GUN and Orbit for distributed graph databases.

Ontopic: TinyBase looks really really nice, fills the gap in-between hefty client side databases and state system solutions like Redux + Persist. I'd like to see Redux middleware integration for time travel debugging, event lots, and snapshotting if possible. The analytics and rollback APIs are a nice touch. Size is enticing.