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Topic
Effects, dependencies, cleanup, stale closures, request lifecycle, and hook behavior.
Practice items tagged with React Hooks and Effects.
Explains cleanup for subscriptions, timers, event listeners, and aborting stale fetches.
Explains loading, error, empty, success, refetch, stale data, and request lifecycle in client-rendered React.
Combines debounce cleanup, AbortController, and request identity to prevent stale search results.
Explains how custom hooks share stateful behavior while preserving ownership, lifecycle, and a focused contract.
Explains what useEffect is for, how dependencies work, and how to avoid stale or runaway effects.
Applies an immediate reversible mutation, blocks overlapping writes, and restores the previous state on failure.