⚛️ React Native Environment Setup

? Quick Overview

React Native allows you to build mobile applications using JavaScript and React. To start developing React Native apps, you need a proper development environment including Node.js, package managers, Android/iOS tools, and React Native CLI.

? Key Concepts

Node.js and npm/yarn for dependency management
React Native CLI for project creation
Android Studio for Android development
Xcode for iOS development (macOS only)
Emulators and real devices for testing

? Syntax / Theory

React Native apps are written using JavaScript or TypeScript and use React components. The environment setup ensures that the required compilers, SDKs, and tools are available to build and run mobile apps.

? Code Example(s)

? View Project Initialization

// Create a new React Native project using CLI npx react-native init MyFirstApp

? View Execution Command

// Start Metro bundler for the React Native project npx react-native start

? Live Output / Explanation

After running the initialization command, a new React Native project structure is created. Running the app on an emulator or device will display the default welcome screen.

? Interactive Example / Visual Flow

Step 1: Write Code

Modify your JavaScript/TypeScript components in your favorite IDE.

? Use Cases

Cross-platform mobile applications
Rapid prototyping of mobile UIs
Apps requiring native performance
Single codebase for Android and iOS

✅ Tips & Best Practices

Use the latest LTS version of Node.js
Prefer physical devices for accurate testing
Keep Android SDK and emulators updated
Use TypeScript for better scalability

? Try It Yourself

Install Node.js and verify using node -v
Create a new React Native app
Run the app on an Android emulator
Edit the App.js file and observe live reload