🔥 Introduction to React Hooks

 

📌 What are Hooks?

Hooks let you use state and lifecycle methods in functional components without writing class components. They were introduced in React 16.8 to make functional components more powerful and easier to use.

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🔹 Why Use Hooks?

Before hooks, we had to use class components to manage state and lifecycle methods. Hooks allow us to:
✅ Use state in functional components (useState)
✅ Perform side effects like fetching data (useEffect)
✅ Share global state (useContext)
✅ Manage complex state logic (useReducer)
✅ Access ref values (useRef)
✅ Improve performance (useMemo, useCallback)

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React Hooks and Their Purpose

Hooks	Purpose
useState	Manages state inside a component
useEffect	Runs side effects like API calls, timers, and event listeners
useContext	Shares global state between components
useReducer	Alternative to useState for complex state logic
useRef	Accesses DOM elements and stores values without re-rendering
useMemo	Optimizes performance by memoizing values
useCallback	Prevents unnecessary re-renders of functions