React - Hook

what is Hook?
Hooks are special functions in React that let you “hook into” React features like state and lifecycle methods—without writing a class.
Before React 16.8, if you wanted to manage state or handle lifecycle events, you had to use class components. Hooks changed that by giving functional components the same powers.

Why Were Hooks Introduced?

Hooks solve several problems that developers faced with class components:

• Complexity – Class components often became messy when dealing with multiple states and lifecycle methods.
• Code Reuse – Sharing stateful logic between components was hard. Developers had to rely on patterns like higher-order components (HOCs) or render props.
• Readability – Class components required this keyword, which confused many beginners.
• With hooks, React made state management and side effects easier and more intuitive.

Built-in Hooks:
React provides several built-in Hooks for common use cases:

• useState()
• useEffort()
• useRef()
• useContext()
• useReducer()
• useMemo()
• useCallback()