Answer
It ensures consistent subscriptions to external stores like Redux or Zustand during concurrent rendering, preventing tearing.
Quick Answer
useSyncExternalStore safely subscribes React components to external stores (Redux, Zustand, browser APIs). It provides a snapshot function (read current state) and a subscribe function (notify on change). React guarantees all reads use the same snapshot within a render — preventing the tearing problem in concurrent mode.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ