What are React hooks and how do they enhance functional components?

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React Hooks are functions that let you use state and lifecycle features in functional components, introduced in React 16.8. They enhance functional components by enabling them to manage state, side effects, context, and more—capabilities previously limited to class components.

Key Hooks include:

1. useState: Adds local state to functional components.

2. useEffect: Handles side effects like data fetching or subscriptions.

3. useContext: Accesses context values without nesting.

4. useReducer: Manages complex state logic, similar to Redux reducers.

5. useRef: Persists values across renders without re-rendering.

Hooks promote cleaner, more reusable code by reducing boilerplate and encouraging separation of concerns. They make it easier to extract logic into custom hooks, improving modularity and testability. Overall, Hooks modernize React development, allowing functional components to fully replace classes in most scenarios.

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