Answer
useId generates unique, stable IDs used for accessibility attributes and prevents hydration mismatches in SSR.
Quick Answer
useId generates a stable, unique ID that's consistent between server and client renders — preventing hydration mismatches. Useful for accessibility attributes like aria-labelledby where you need to link elements by ID. Unlike random IDs or incrementing counters, useId works correctly with SSR and concurrent rendering.
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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