What is React? Why we use it? When, Where & Pros and Cons.

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⚛️ What is React?

  • A JavaScript library for building user interfaces
  • Helps create interactive, reusable UI components
  • Ideal for Single Page Applications (SPAs)
  • Powered by Virtual DOM for faster performance

✅ Why Use React?

  • 🔁 Component-Based – Reusable UI blocks = less code, better structure
  • ⚡ Fast Rendering – Uses Virtual DOM to update only the changed parts.

📍Where and When to Use React?

  • A dynamic front-end (like a dashboard, social media, e-commerce site)
  • A SPA (Single Page Application) for fast user interactions
  • Reusable components like buttons, modals, forms, cards, etc.
  • Integration with other libraries like Redux, React Router, etc.

React is used in:

  • Instagram, Facebook, WhatsApp Web
  • Netflix, Airbnb, Uber, and more!

🌟 Advantages of React

  • ✅ Reusability of components
  • ✅ Improved performance with Virtual DOM
  • ✅ Strong community and third-party support
  • ✅ Easier debugging with tools like React DevTools
  • ✅ Flexibility with different backend frameworks

⚠️ Disadvantages of React

  • ❌ Fast-changing environment – frequent updates and breaking changes
  • ❌ SEO can be tricky in SPAs (Next.js solves this)
  • ❌ Too many choices (state management, routing, etc.)

Thanks for reading! If you found this helpful, feel free to comment, share, or suggest what you’d like me to cover next. 🙌



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