Answer
useOptimistic enables optimistic UI updates before server confirmation, improving perceived performance.
Quick Answer
useOptimistic in React 19 lets you immediately show the expected result of an action before the server confirms it. The UI updates optimistically (appears instant), and if the server action fails, React reverts to the previous state. Replaces manual optimistic update patterns that required extra useState and error handling.
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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