Answer
useEffect runs side effects after rendering, such as API calls, subscriptions, timers, or DOM manipulation.
Quick Answer
useEffect lets you run side effects after a component renders — data fetching, subscriptions, DOM manipulation. It runs after the browser paints, keeping rendering fast. The dependency array controls when it re-runs. A cleanup function lets you cancel subscriptions or timers when the component unmounts.
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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