Learned React Hooks

Introduction to React Hooks

React Hooks revolutionized how we write components. Before Hooks, only class components could manage state and lifecycle methods. Hooks bring state, lifecycle behavior, and other React features to functional components, making code simpler, cleaner, and more reusable.

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Why React Hooks Matter

Hooks solve several problems developers faced with class components:

• Complex lifecycle methods were hard to understand and maintain
• Reusing logic between components was difficult
• Large components became confusing over time With Hooks, you can break logic into smaller, reusable functions while keeping components focused and readable.

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Commonly Used React Hooks

1. useState

useState adds state to functional components. It returns a state value and a function to update it.

Use case: Managing form inputs, toggles, counters, and UI state.

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2. useEffect

useEffect handles side effects like API calls, subscriptions, timers, and DOM updates.

Use case: Fetching data on page load, updating the document title, and cleaning up resources.

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3. useContext

useContext accesses shared data without passing props through every component level.

Use case: Themes, user authentication data, and language settings.

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4. useRef

useRef accesses DOM elements or persists values without triggering re-renders.

Use case: Managing focus, storing previous values, and working with animations.

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5. useMemo and useCallback

These Hooks optimize performance by memoizing values and functions.

Use case: Preventing unnecessary re-renders in large or complex applications.

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Benefits of Using React Hooks

• Cleaner, more readable code
• Better separation of logic
• Easier state management
• Improved performance optimization
• Encourages functional programming patterns

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Best Practices When Using Hooks

• Always call Hooks at the top level of your component
• Never call Hooks inside loops or conditions
• Create custom Hooks to reuse logic
• Keep components small and focused

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Conclusion

React Hooks make modern React development faster, more efficient, and easier to maintain. Master Hooks like useState, useEffect, and useContext to build scalable, high-performance applications with less code and better structure. Whether you're a beginner or an experienced developer, Hooks are essential to your React toolkit.

const HelloWorld = () => {
   console.log("Hello World!!");
}