Web Development

React is one of the most popular JavaScript libraries for building user interfaces. Here's a comprehensive guide to get you started: ## What is React? React is a JavaScript library developed by Facebook for building interactive user interfaces. It allows you to build reusable UI components. ## Key Concepts: 1. **Components**: React apps are built using components - reusable pieces of code that return HTML. 2. **JSX**: JavaScript XML allows you to write HTML-like code in JavaScript. 3. **Props**: Short for properties, props allow you to pass data from parent to child components. 4. **State**: State allows components to create and manage their own data. ## Getting Started: ```bash npx create-react-app my-app cd my-app npm start ``` ## Best Practices: - Keep components small and focused - Use functional components with hooks - Follow the single responsibility principle - Always use keys when rendering lists Start building your first React component today!