Answer
Updating state during render breaks render purity and creates infinite re-render loops.
Quick Answer
Updating state during rendering creates an infinite loop or at least unpredictable behavior — the render triggers a state update which triggers another render. React detects this pattern and warns because the render function must be a pure, side-effect-free function. State updates belong in event handlers or effects, not mid-render.
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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