javascript - Firestore: What's the pattern for adding new data in Web v9?

Question

I have seen in many places that to access nested documents and collections the pattern is something like db.collection("users").doc("frank").collection("pets") etc.

This makes a lot of sense to me and is easy to understand. The trouble is, my (React) project is set up in the Web version 9 way. I've combed the docs over and over and can't see anything that goes beyond referencing X doc in Y collection.

I need to reference Users > uid > someCollection

But in the Web Version 9 way I can only do: doc(db, "users", uid)

How do I go deeper?

Answer 1

Waitting for answers