idea3: atomFamily supports instanceof

[dmaskasky]

Related Bug Reports or Discussions

idea1: #2678
idea2: #2679

Fixes #
jotaijs/jotai-scope#50

Summary

jotai-scope is trying to support scoping atomFamily.

const fooFamily = atomFamily((id) => atom(id))
<ScopedProvider atomFamilies={[fooFamily]}>{children}</ScopeProvider>

This PR demonstrates one approach in which the atomFamily supports use of instanceof language feature.

The following pseudo code represents logic that would live in jotai-scope.

const isExplicitlyScoped = atomSet.has(atom) || Array.from(atomFamilySet).some(af => atom instanceof af)

Check List

• pnpm run prettier for formatting code and docs

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Name	Status	Preview	Comments	Updated (UTC)
jotai	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 30, 2024 2:02pm

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Preview in LiveCodes

Latest commit: cb641c8
Last updated: Jul 30, 2024 2:02pm (UTC)

Playground	Link
React demo	https://livecodes.io?x=id/DTWHNYL4W

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See documentations for usage instructions.

[dai-shi]

I don't think this complexity and the trick should be added in this util.
Please consider patching atomFamily in jotai-scope.

[dai-shi]

If we were to go this road, I think I'd prefer adding .has(atom) method. But it feels too specific to jotai-scope.