Is there a way to suppress "Detected multiple Jotai instances" warning - Microfrontend environment

[mezei]

I'm in a Microfrontend environment where any of the remote apps may or may not be using jotai (it's not a shared dependency, the environment is too dynamic, so everyone that uses jotai likely has their own jotai instance).

The apps are using jotai in providerless mode (eg no wrapper), this seems to be the most straightforward choice as each instance will create its own default store.
Sometimes the "Detected multiple Jotai instances. It may cause unexpected behavior with the default store." warning appears (maybe because remotes remount, who knows), however as I understand this is not something to worry about in this scenario as it's kind of expected in this Microfrontend environment.

Is there a way to surpress this warning, maybe tell jotai that we're in such environment and this is all fine?

[dai-shi]

jotai/src/vanilla/store.ts

Lines 23 to 36 in f287c5d

	export function getDefaultStore(): Store {
	if (!defaultStore) {
	defaultStore = createStore()
	if (import.meta.env?.MODE !== 'production') {
	;(globalThis as any).__JOTAI_DEFAULT_STORE__ ||= defaultStore
	if ((globalThis as any).__JOTAI_DEFAULT_STORE__ !== defaultStore) {
	console.warn(
	'Detected multiple Jotai instances. It may cause unexpected behavior with the default store. https://github.com/pmndrs/jotai/discussions/2044',
	)
	}
	}
	}
	return defaultStore
	}

How about adding globalThis.__JOTAI_DEFAULT_STORE__ = null in your code?

[mezei]

Thank you, this actually works.

I was getting 2 of these warnings and this resolved 1, which pointed me to a different issue in one of the remotes that were loading jotai twice via separate (Webpack) chunks, so it even helped me spot that one!

So globalThis.__JOTAI_DEFAULT_STORE__ is only used for this warning check, resetting it won't cause any issues?

[dai-shi]

Right, and it's only for DEV mode actually.