Answer
The effect runs after every render, potentially causing infinite loops or unnecessary API requests.
Quick Answer
Without all dependencies listed, the effect captures stale values from its first render (a stale closure). The effect runs but uses old data — leading to bugs that are hard to trace. ESLint's exhaustive-deps rule catches this. In React 18+, running effects twice in Strict Mode also surfaces these issues.
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