Answer
startTransition marks updates as non-urgent so urgent updates like typing render first, keeping UI responsive under heavy workloads.
Quick Answer
startTransition marks state updates as non-urgent transitions. React immediately renders the current UI, then processes the transition update in the background — interruptible by higher-priority updates. If a more urgent update arrives (user typing), React pauses the transition, handles the urgent update, then resumes. Keeps the UI responsive during heavy renders.
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