[Question]Does recoil preserve immutability?

[monii]

hello??
Currently, we are trying to manage the state by applying recoil to react.
I have one question. Does recoil preserve immutability when changing atoms?
I don't see many examples of using recoil and immer.js together, so I wonder if reference type values ​​are deep copy.
There was a question on stackoverflow that had a similar problem to me, but it didn't have an answer, so I'm posting it here!
stackoverflow

I'd really appreciate it if you could give me the answer! :)

[drarmstr]

Recoil does not deep copy state values. However, state values should be immutable and Recoil will actually deep freeze them in dev mode to catch issues. (Except with dangerouslyAllowMutability option)