Answer
Duplicated state leads to UI drift and inconsistency. Derived state should be computed on render, not stored.
Quick Answer
Derived state (state that mirrors props) gets out of sync when the parent prop updates but the local state doesn't reset. It creates two sources of truth. Instead, derive values directly from props using useMemo, or use a key prop to fully reset a component when its input changes. Minimize state — derive what you can.
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