How to disable warning about "outside a reactive context"?

[brundonsmith]

MobX outputs the following warning when calling a computedFn outside of a reactive context:

invoking a computedFn from outside an reactive context won't be memoized, unless keepAlive is set
event rendered

The same thing happens for createTransformer

Fair enough; but for my case, knowing the downside (that in these circumstances the function will just act as if computedFn had not been used), I still want to proceed in doing this without creating console noise. I know setting keepAlive will get rid of the warning, but that's not what I want to do because it changes the behavior. I want the current behavior, just without the warning.

Is there a way to suppress this warning? I couldn't find anything in the docs for configure()

For prior art, this looks very similar to what computedRequiresReaction does:

computedRequiresReaction: boolean

Forbids the direct access of any unobserved computed value from outside an action or reaction. This guarantees you aren't using computed values in a way where MobX won't cache them. Default: false.

https://mobx.js.org/configuration.html

So I guess my request is for a computedFnRequiresReaction flag, or something like that

Edit: It seems from reading the source like maybe this can be done on a per-call basis by passing a second argument with options, and doing this?

mobx/packages/mobx/src/core/computedvalue.ts

Line 41 in 4ac6b45

export interface IComputedValueOptions<T> {

const myFn = computedFn((a, b) => a + b, {
  requiresReaction: false
}) 

[urugator]

Both computedRequiresReaction (global) and requiresReaction (per computed) should already work with computedFn (note the opts):
https://github.com/mobxjs/mobx-utils/blob/3a1ee03527950a44c5ce57007344a56a9b974c94/src/computedFn.ts#L79-L87

The only problem is that atm requiresReaction does not take a precedence:

mobx/packages/mobx/src/core/computedvalue.ts

Lines 296 to 301 in 1174004

	if (globalState.computedRequiresReaction || this.requiresReaction_) {
	console.warn(
	`[mobx] Computed value '${this.name_}' is being read outside a reactive context. Doing a full recompute.`
	)
	}
	}

therefore, it can't be used to opt-out of global behavior (only opt-in if global is false). I think we can change that.

[urugator]

PR: #3214

[urugator]

Ah, I completely missed that computedFn has it's own warning:
https://github.com/mobxjs/mobx-utils/blob/3a1ee03527950a44c5ce57007344a56a9b974c94/src/computedFn.ts#L68-L74
Well, perhaps it can also conditionalize on requiresReaction option?

Btw there is related issue: mobxjs/mobx-utils#268