How to ensure always dispose formstate when necessary

[lzfee0227]

sth like:

new FormState(initValue, disposer)

or

https://github.com/mobxjs/mobx-react/issues/561

or sth else

FYI:

https://mobx.js.org/best/pitfalls.html#always-dispose-reactions

[nighca]

It can be another question: in which cases should we dispose FormState / FieldState?

[lzfee0227]

https://mobx.js.org/best/pitfalls.html#always-dispose-reactions

It can be another question: in which cases should we dispose FormState / FieldState?

case: use global store in validators? (will use autorun in formstate-x)

@nighca

[nighca]

case: use global store in validators?

And in the predict function of disableValidationWhen.

[nighca]

With change of v3.x—as we stated in #40

https://github.com/qiniu/formstate-x/issues/18 will partly benefit from this: fields of array form state will always be correctly disposed as we manipulate them inside of formstate-x only.

We no longer need to worry about dispose for child states. The remaining problem is: how to ensure the root state correctly disposed.

Actually it is almost the same problem as: how to ensure a MobX store correctly disposed.

Just like the latter one mostly solved with tools like useLocalStore, the previous one can be mostly solved with tools like useFormstateX

[nighca]

Actually it is almost the same problem as: how to ensure a MobX store correctly disposed.

Since it turns out to be a problem not about formstate-x, but about MobX store. I will close this issue.