What are React hooks? Name a few commonly used ones.
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React Hooks are special functions introduced in React 16.8 that let developers use state and other React features in functional components without writing class components. They make components more concise, easier to reuse, and simpler to test. Hooks allow you to “hook into” React’s features like state management, lifecycle methods, and context directly inside functional components.
Some commonly used React hooks are:
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useState → Allows adding and managing state within a functional component.
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useEffect → Handles side effects such as fetching data, subscriptions, or updating the DOM after rendering.
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useContext → Provides access to values from React’s Context API without prop drilling.
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useRef → Gives access to DOM elements or stores mutable values that persist across renders.
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useMemo → Optimizes performance by memoizing expensive calculations so they don’t run on every render.
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useCallback → Returns a memoized version of a function to prevent unnecessary re-renders of child components.
In short, React hooks make functional components powerful and flexible, eliminating the need for most class components in modern React development.
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