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React

React is a JavaScript library for building user interfaces with a component-based architecture. Developed and maintained by Meta (Facebook), it's the most popular frontend library in the world.

What You'll Learn​

Fundamentals​

Master React core concepts and modern patterns.

Topics covered:

  • Components, JSX, and props
  • State and event handling
  • All React hooks (useState, useEffect, custom hooks)
  • Routing with React Router
  • State management (Context API, Redux)

Testing​

Write reliable tests for your React applications.

Topics covered:

  • React Testing Library
  • Jest testing framework
  • Component testing
  • Integration testing
  • End-to-end testing

Quick Start​

# Create a new React app with Vite (recommended)
npm create vite@latest my-app -- --template react
cd my-app
npm install
npm run dev

# Or with Create React App (legacy)
npx create-react-app my-app
cd my-app
npm start

Why React?​

Strengths​

  • Component-Based - Reusable UI building blocks
  • Virtual DOM - Efficient updates and rendering
  • Large Ecosystem - Vast library of third-party packages
  • Strong Community - Millions of developers worldwide
  • React Native - Build mobile apps with same concepts
  • Flexibility - Library, not framework - use what you need
  • Job Market - Highest demand for frontend developers

Use Cases​

  • Single-page applications (SPAs)
  • Progressive web apps (PWAs)
  • Mobile apps (React Native)
  • Static sites (Next.js, Gatsby)
  • Dashboard and admin panels
  • E-commerce platforms

Learning Path​

  1. Master Fundamentals - Components, hooks, state management
  2. Learn Testing - React Testing Library and Jest
  3. Explore ecosystem - Next.js, Redux, React Query
  4. Build projects - Apply your knowledge with real applications

Start building with React today - the most popular frontend library!