Answer
State updates are asynchronous and batched. Using callbacks like setCount(prev => prev + 1) ensures correct and predictable updates.
Quick Answer
setCount(count + 1) captures count from the closure — if multiple updates are batched, they all use the same stale count and only the last one "wins." setCount(prev => prev + 1) receives the latest state each time. Always use the callback form when the next state depends on the current state.
S
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