What are hooks in React and how are they used?

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Hooks in React are special functions introduced in React 16.8 that let you use state and other React features in functional components, which previously only class components could do. Hooks make components simpler and more reusable by avoiding class syntax.

Common Hooks:

  1. useState
    Allows you to add state to a functional component. It returns a state variable and a function to update it.

  2. useEffect
    Lets you perform side effects (e.g., fetching data, subscriptions) in function components. It runs after render and can clean up on unmount or before the next effect.

How Hooks are used:

  • Hooks must be called at the top level of a React function (not inside loops or conditions).

  • They cannot be used in class components, only functional ones.

  • Hooks enable sharing logic between components by creating custom hooks.

Summary:

Hooks simplify React development by enabling stateful logic and side effects in functional components, promoting cleaner, more modular, and easier-to-understand code.

Read More

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