[Firestore] FR: keepSynced - control what gets in the offline cache

What feature would you like to see?

Something similar to what the Realtime Database offers:

docRef.keepSynced(keepOnlyThisReferenceInLocalCache=true)

This should store ALL data that this document reference contains and remove ALL other data from the cache.

How would you use it?

It would be great to limit the amount of data Firestore syncs and control what gets synced (our users experience cache misses when they are offline, frequently). Our team organized the document model so that every user has its own root that we would like to keep in sync.

That way, one can use the Firestore database as an offline-first solution.

[wilhuff]

I’m going to leave this open because we are intending to address this, but we’re not going to do the trivial API sugar that RTDB did so it’s going to be a while before this lands.

[ruofeilyu]

Any updates on this? This feature make Firestore to be offline first database in some scenarios