What are React hooks?

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React Hooks are special functions that let you use state and other React features in functional components, which were previously only available in class components. Introduced in React 16.8, hooks allow for cleaner, more modular code by eliminating the need for classes in most cases.

Common React Hooks:

1. useState()

• Lets you add state to functional components.

2. useEffect()

• Performs side effects (like fetching data, setting up subscriptions).

• Runs after the component renders.

3. useContext()

   • Accesses values from a React context directly, without using <Context.Consumer>.

4. useRef()

   • Creates a mutable reference that persists across renders.

   • Often used to access DOM elements or store values that don’t trigger re-renders.

5. useMemo() and useCallback()

• Optimize performance by memoizing values or functions so they don’t get recreated on every render.

Key Benefits of Hooks:

• Reuse logic easily between components.

• Avoid class-based boilerplate code.

• Enhance code readability and structure.

Rules of Hooks:

1. Only call hooks at the top level (not inside loops, conditions).

2. Only call hooks from React functions (components or custom hooks).

In short, React Hooks bring powerful features like state, lifecycle, and context into functional components, making them the modern standard in React development.

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