Is that pure?

[uniho]

jotai/src/react/useAtomValue.ts

Lines 136 to 140 in 6f7551c

	let value = valueFromReducer
	if (storeFromReducer !== store || atomFromReducer !== atom) {
	rerender()
	value = store.get(atom)
	}

Is that code pure?
A React doc says "each component should only “think for itself”, and not attempt to coordinate with or depend upon others during rendering.".
That code may be on "during rendering".

[dai-shi]

It's pure or idempotent.
Setting local state during rendering is allowed in the docs.
However, this doesn't solve tearing. For that, useSyncExternalStore would be necessary.

[uniho]

@dai-shi

Thanks.
If it's pure then it's fine.
I realize that the reason you don't use useSyncExternalStore() is because useSyncExternalStore() doesn't correspond to startTransition async.