[pkage]

Not OP, but common solutions in this space represent the state as conflict-free replicated data types (CRDTs). Some popular browser-based libraries for that are Y.js[0] and Automerge[1].

[0]: https://yjs.dev/ [1]: https://automerge.org/

[nextaccountic]

By the way, for those wanting to do this but in Rust, there is https://crates.io/crates/yrs and https://crates.io/crates/automerge

[babymode]

And Loro [1], relatively new player which recently hit 1.0, with solid performance and some features the others don’t have

[1]: https://loro.dev/