makeAutoObservable and make

[MutelyMilo]

Hello, dear author:

I did not find a description of the second and third arguments in the method...

Demo:
makeAutoObservable(this, { rootStore: false });

rootStore: false

What does that mean?

In mobx6, the documentation feels like it doesn't go deep enough, and I'm afraid of missing the meaning of some features and parameters.

[kubk]

It's documented here: https://mobx.js.org/observable-state.html#makeautoobservable

"Members marked with false in the overrides argument will not be annotated"

Function makeAutoObservable automatically converts properties to observables, methods to actions and getters to computed. Using false in second arguments allows skipping this conversion for a specific field.

[MutelyMilo]

That's pretty straightforward about my problem, Thanks

[urugator]

2nd argument are annotations - same as makeObservable, but are optional - it allows you to override auto behavior for specific field. false means ignore, true means auto (has the same effect as not specifying override)

3rd argument are options

[MutelyMilo]

Thank you very much. It was an oversight on my part

[mattleonowicz]

@kubk @urugator I have a followup question to this. This rootStore is always marked with false throughout the docs. Why is that? Is it to avoid double-observing it, because it's already observed? I don't have any issues when I forget to to this.

[urugator]

rootStore field should be readonly, so no need to make it observable, but also no harm in doing so - field becomes observable and value is ignored, because it's instance of a class.

[kubk]

@mattleonowicz Good catch, I believe the documentation should be updated: #3775

As for me, I never exclude class instances from makeAutoObservable.