React Native Development Environment Fundamentals

Course: React Native Training

Topic: React Native Development Environment Fundamentals

Course Link: React Native Training at JustAcademy

Demo Link: Register for a Course Demo

JustAcademy Website: Visit JustAcademy

Official React Native Documentation: Getting Started with React Native

1. Introduction to React Native Development Environment

A React Native development environment is a collection of software tools, programming runtimes, libraries, platform SDKs, command-line utilities, and testing devices that developers use to build mobile applications.

React Native enables developers to create Android and iOS applications using JavaScript or TypeScript and React. Instead of building every screen independently using separate Android and iOS application code, developers can share much of their application logic and user interface code while using native platform capabilities where necessary.

Before writing and running a React Native application, developers must understand how the development environment works. This includes installing Node.js, managing packages, creating a project, configuring native development tools, starting the Metro bundler, and running the application on an emulator, simulator, or physical device.

1.1 Why Is the Development Environment Important?

• It provides the tools needed to create React Native projects.
• It allows developers to install and manage dependencies.
• It enables applications to run on Android and iOS.
• It supports debugging, testing, and troubleshooting.
• It helps developers identify configuration and build errors.
• It supports consistent development practices across teams.
• It makes the development and testing process more efficient.

1.2 Main Components of the Environment

2. Learning Objectives

After studying this topic, learners should be able to:

• Understand the architecture of a React Native development environment.
• Identify the software and tools required for mobile development.
• Install and verify Node.js, npm, and npx.
• Understand package.json and project dependencies.
• Explain the purpose of React Native CLI and Expo.
• Understand the roles of Android Studio, the JDK, and the Android SDK.
• Understand Xcode and iOS development requirements.
• Create a React Native project.
• Start Metro and run an application on a development device.
• Use Git and debugging tools during development.
• Troubleshoot common environment configuration problems.

3. Understanding the React Native Development Workflow

A development workflow describes the sequence of activities required to create, run, test, and maintain a React Native application.

3.1 Typical Development Workflow

1. Install the required development tools.
2. Create a new React Native project or open an existing one.
3. Install project dependencies.
4. Write components using JavaScript or TypeScript.
5. Start the Metro development server.
6. Build and launch the native application.
7. Test the application on a virtual or physical device.
8. Inspect errors and debug application behavior.
9. Commit code changes using version control.
10. Prepare the application for release when development is complete.

3.2 How the Development Tools Work Together

When a developer changes a React Native component, the code editor saves the changes. Metro processes the JavaScript or TypeScript modules and provides the development bundle. The running native application loads the bundle, allowing developers to observe the updated interface.

When a native build is required, the Android or iOS build tools compile and package the platform-specific application. This means that JavaScript development and native application building are related but distinct processes.

3.3 Development Environment Flow

Developer
   |
   v
Code Editor
   |
   v
React Native Project
   |
   +----------------------+
   |                      |
   v                      v
Metro Bundler        Native Build Tools
   |                      |
   v                      v
JavaScript Bundle    Android / iOS App
   |                      |
   +-----------+----------+
               |
               v
       Emulator / Simulator
        or Physical Device
               |
               v
        Testing and Debugging

4. Understanding JavaScript and React Prerequisites

React Native development builds on JavaScript and React concepts. A basic understanding of these technologies makes it easier to create components, manage state, handle events, and understand project errors.

4.1 JavaScript Fundamentals

• Variables and constants using let and const.
• Functions and arrow functions.
• Objects and arrays.
• Array methods such as map() and filter().
• Promises and asynchronous programming.
• Modules and import/export statements.
• Destructuring and template literals.
• Error handling with try and catch.

4.2 React Fundamentals

• Functional components.
• JSX syntax.
• Props and component composition.
• State and event handling.
• Hooks such as useState and useEffect.
• Conditional rendering.
• Lists and keys.
• Basic component lifecycle concepts.

4.3 Example of a JavaScript Function

const greetUser = (name) => {
  return `Welcome, ${name}!`;
};

console.log(greetUser("Developer"));

This example demonstrates a JavaScript arrow function and a template literal. React Native applications use JavaScript features like these to implement application logic.

5. Installing Node.js

Node.js is a JavaScript runtime used by the React Native development toolchain. It allows development utilities and package-management tools to execute outside a web browser.

5.1 Why Node.js Is Required

• Runs JavaScript-based development tools.
• Supports the React Native CLI and Metro.
• Allows npm scripts to execute.
• Supports installation and management of project packages.
• Helps automate common development tasks.

5.2 Installation Steps

1. Visit the official Node.js website.
2. Download a supported release compatible with your React Native version.
3. Run the installer for your operating system.
4. Complete the installation steps.
5. Open a new terminal or command prompt.
6. Verify that Node.js is available.

5.3 Verify Node.js Installation

node --version

The command should display the installed Node.js version. If it is not recognized, verify that the installation completed correctly and that the executable is available through PATH.

5.4 Choosing a Node.js Version

React Native releases have specific Node.js compatibility requirements. Use the version recommended by the official setup guide or compatibility information for the React Native version in your project.

When several projects require different Node.js versions, a version manager can help developers switch between supported versions without repeatedly reinstalling Node.js.

6. Understanding npm and npx

npm is the package manager commonly installed with Node.js. It installs dependencies and executes scripts defined in a project's package.json file. npx allows developers to execute package commands without requiring every command-line package to be installed globally.

6.1 Verify npm and npx

npm --version
npx --version

6.2 Common npm Commands

6.3 Understanding npx

npx is useful for running tools such as the React Native Community CLI. For example, the following command creates a project:

npx @react-native-community/cli@latest init MyFirstApp

Use the official React Native instructions for the selected version. Avoid relying on outdated tutorials that recommend installing obsolete CLI packages globally.

7. Understanding the React Native CLI

The React Native Community CLI provides terminal commands for creating projects and running native development tasks. It is useful when developers want direct access to the Android and iOS native project directories.

7.1 Creating a Project with the Community CLI

npx @react-native-community/cli@latest init MyFirstApp

The command initializes a project called MyFirstApp and installs the dependencies needed by its template. Project creation may take time because package downloads and setup operations are involved.

7.2 CLI Workflow Characteristics

• Provides access to native Android and iOS project files.
• Allows direct native configuration when required.
• Uses Android build tools for native Android builds.
• Uses Xcode for local native iOS builds.
• Requires developers to manage platform tooling and native dependencies.

7.3 Common CLI Commands

npx @react-native-community/cli@latest init MyFirstApp
cd MyFirstApp
npm start

The project scripts and available CLI commands may vary by React Native version. Review package.json and the official documentation when a command is unavailable.

8. Understanding Expo and Development Workflows

Expo is a framework and set of tools built around React Native. It simplifies many development tasks and can be a suitable choice for beginners as well as production applications.

8.1 Expo Workflow

An Expo project can be created with the following command:

npx create-expo-app@latest MyExpoApp

Follow the current Expo instructions for running the project and choosing a development method. Expo supports different workflows, including development builds and cloud build services.

8.2 CLI vs Expo

Both workflows use React Native. Select a workflow based on the project's native requirements, team experience, and preferred development process.

9. Choosing a Code Editor

A code editor helps developers write, organize, and maintain JavaScript or TypeScript files. A developer may use any editor that supports the project's workflow.

9.1 Visual Studio Code

Visual Studio Code is a popular editor for React Native development because it offers an integrated terminal, syntax highlighting, source control, and extension support.

9.2 Setting Up the Editor

1. Download and install Visual Studio Code.
2. Open the React Native project folder.
3. Use the integrated terminal to run project commands.
4. Install suitable JavaScript or TypeScript extensions if needed.
5. Use formatting and linting tools configured by the project.
6. Keep the editor and terminal working from the correct project directory.

9.3 Common Editor Features

• Syntax highlighting and code navigation.
• Integrated terminal access.
• Git source control integration.
• Code formatting and linting support.
• Error highlighting and debugging integrations.

A code editor does not replace Android Studio or Xcode when native build tools are required.

10. Understanding Android Studio

Android Studio is Google's integrated development environment for Android. React Native developers use it to install Android SDK components, create virtual devices, manage native project configuration, and diagnose Android build problems.

10.1 Why Android Studio Is Required

• Manages Android SDK platforms and tools.
• Provides the Android Emulator and Device Manager.
• Supports native Android project inspection.
• Helps diagnose Gradle and Android build errors.
• Provides tools for testing Android applications.

10.2 Installation Steps

1. Visit the official Android Studio website.
2. Download the installer for your operating system.
3. Run the installer and complete the setup wizard.
4. Install Android SDK, Android SDK Platform, and Android Virtual Device components as required.
5. Open SDK Manager and install the platform packages required by your React Native version.
6. Open Device Manager and create a virtual Android device.

10.3 Important Android Tools

11. Understanding the Java Development Kit

The Java Development Kit (JDK) provides Java tools needed by Android build processes. React Native Android projects use Gradle and Android build tooling, so an appropriate JDK version must be available.

11.1 JDK Installation

1. Check the JDK requirements for your React Native version.
2. Download a compatible OpenJDK distribution from a trusted source.
3. Install the JDK.
4. Configure JAVA_HOME if needed by your environment.
5. Verify that the expected Java version is available in the terminal.

A common recommendation in many React Native setup guides is JDK 17, but always check the requirements of the specific React Native and Android Gradle Plugin versions in your project.

11.2 Verify Java

java -version
javac -version

Both commands should display version information. If they are not recognized, check the JDK installation and PATH configuration.

12. Understanding the Android SDK and Environment Variables

The Android SDK provides platform APIs and tools used to build, install, and test Android applications. Environment variables help development tools locate the SDK and related utilities.

12.1 ANDROID_HOME

ANDROID_HOME is commonly used to identify the location of the Android SDK. The path varies according to the operating system and installation settings.

• Windows: %LOCALAPPDATA%\Android\Sdk
• macOS: $HOME/Library/Android/sdk
• Linux: $HOME/Android/Sdk

These are typical default locations. Use the actual SDK location displayed in Android Studio if it differs.

12.2 Configure the PATH

The SDK platform-tools directory should be accessible from the terminal for convenient use of ADB.

Typical Windows PATH entry:

%LOCALAPPDATA%\Android\Sdk\platform-tools

Typical macOS shell configuration:

export ANDROID_HOME="$HOME/Library/Android/sdk"
export PATH="$PATH:$ANDROID_HOME/platform-tools"
export PATH="$PATH:$ANDROID_HOME/emulator"

For Linux, replace the SDK location with the actual path. After changing environment variables, open a new terminal or reload the relevant shell configuration.

12.3 Verify the Android SDK Configuration

On Windows Command Prompt:

echo %ANDROID_HOME%
adb --version

On PowerShell:

$env:ANDROID_HOME
adb --version

On macOS or Linux:

echo $ANDROID_HOME
adb --version

13. Understanding Xcode and iOS Development

Xcode is Apple's development environment for building, testing, and debugging native iOS applications. Local native iOS builds require macOS and a compatible Xcode installation.

13.1 Why Xcode Is Required

• Provides native iOS build tools.
• Includes the iOS Simulator and supported simulator runtimes.
• Supports native debugging and build diagnostics.
• Provides tools for application signing and deployment.
• Allows developers to inspect the native iOS project.

13.2 Install Xcode

1. Use a Mac that supports the required Xcode version.
2. Visit the official Apple Xcode page or the Mac App Store.
3. Download and install Xcode.
4. Open Xcode and complete its initial setup.
5. Install the required simulator runtime if it is not already available.
6. Check that the correct Command Line Tools version is selected.

13.3 Verify Xcode

xcode-select -p
xcodebuild -version

These commands display the selected Xcode developer directory and installed version.

14. Understanding CocoaPods

CocoaPods is a dependency manager used by many native iOS projects. React Native iOS projects may use CocoaPods to install the native libraries required by application dependencies.

14.1 Why CocoaPods Is Needed

• Manages native iOS library dependencies.
• Integrates third-party native libraries into the iOS project.
• Helps resolve and install compatible pod versions.
• Supports reproducible dependency installation when project configuration is maintained.

14.2 Install iOS Dependencies

Follow the project's setup instructions. When a project provides a Gemfile, a common approach is to use Bundler:

cd ios
bundle install
bundle exec pod install
cd ..

These commands should be used when appropriate for the project's dependency configuration. Otherwise, follow the current official React Native instructions and the project's CocoaPods setup.

14.3 Common CocoaPods Problems

• Ruby version conflicts.
• Missing or incompatible pod specifications.
• Network problems during dependency downloads.
• Incorrect Xcode command-line tools selection.
• Dependency versions that do not match the project configuration.

For installation details, visit the official CocoaPods guides.

15. Understanding Metro Bundler

Metro is the JavaScript bundler used by React Native. It processes JavaScript or TypeScript modules and serves the development bundle to the running application.

15.1 Why Metro Is Important

• Processes application modules and dependencies.
• Serves the JavaScript bundle during development.
• Displays bundling errors and development messages.
• Supports a fast development feedback cycle.
• Works with the React Native application running on a device or emulator.

15.2 Start Metro

Open a terminal in the project root and run:

npm start

Keep the Metro terminal running while developing. Use a separate terminal to build or launch the native application.

15.3 Reset Metro Cache

If persistent bundling issues occur, you can stop the server and restart it with the cache-reset option supported by the project's CLI.

npx react-native start --reset-cache

Cache resetting is a troubleshooting step rather than a routine requirement. First inspect the error message to understand the cause of the problem.

16. Understanding Watchman

Watchman is a file-watching service that monitors changes in project files. It can improve file-change detection in supported development environments.

16.1 Benefits of Watchman

• Monitors file changes during development.
• Can help development tools respond to source-code changes.
• Supports efficient file-system watching in compatible environments.
• Can be useful in larger projects with many files.

16.2 Installation Considerations

Follow the React Native setup instructions for your operating system to determine whether Watchman is recommended or needed for your workflow. It is commonly used on macOS development environments.

Watchman is not a replacement for Metro. Watchman monitors file changes, while Metro bundles and serves application modules.

17. Understanding Git and Version Control

Git is a distributed version control system used to track source-code changes. It helps developers work collaboratively, review modifications, and restore earlier versions of project files.

17.1 Why Git Is Important

• Tracks code changes over time.
• Supports branches for features and fixes.
• Helps teams collaborate on shared projects.
• Allows developers to review and revert changes.
• Provides a history of development work.

17.2 Verify Git Installation

git --version

If Git is not installed, download it from the official Git website.

17.3 Common Git Commands

git status
git add .
git commit -m "Set up React Native project"
git log --oneline

Use git add carefully and review git status before committing. Never commit secrets, signing credentials, or machine-specific private configuration.

18. Understanding the React Native Project Structure

A React Native project contains application source files, configuration files, dependency metadata, and native platform directories. The exact structure depends on the React Native version and the selected project template.

18.1 Example Project Structure

MyFirstApp/
├── android/
├── ios/
├── node_modules/
├── App.tsx
├── package.json
├── package-lock.json
├── app.json
├── tsconfig.json
└── .gitignore

18.2 Purpose of Important Files and Folders

18.3 Understanding package.json

The package.json file describes the project, its dependencies, and the scripts developers can execute.

{
  "name": "my-first-app",
  "version": "1.0.0",
  "scripts": {
    "start": "react-native start",
    "android": "react-native run-android",
    "ios": "react-native run-ios"
  }
}

This is an illustrative example of scripts, not a complete package.json file for every React Native version. Use the scripts generated by your project's template rather than replacing the file with this fragment.

19. Creating Your First React Native Project

After installing the required tools, create a new project to verify that the development environment works correctly.

19.1 Create the Project

npx @react-native-community/cli@latest init MyFirstApp

Wait for the CLI to create the project and install its dependencies. If the command fails, inspect the complete terminal output before changing the environment.

19.2 Enter the Project Directory

cd MyFirstApp

19.3 Install Dependencies if Required

If you are working with an existing project or dependencies have not yet been installed, use the project's package manager and lockfile.

npm install

For a newly created project, the CLI may already have installed the dependencies. Avoid unnecessary dependency changes during initial setup.

19.4 Open the Project in Your Editor

Open the MyFirstApp folder in your preferred code editor. Review the main component and package.json before making changes.

20. Creating a Simple React Native Application

The following example displays a welcome message. It demonstrates basic imports, a functional component, JSX, and styles.

import React from 'react';
import { SafeAreaView, Text, StyleSheet } from 'react-native';

function App() {
  return (
    <SafeAreaView style={styles.container}>
      <Text style={styles.title}>
        Welcome to React Native!
      </Text>
      <Text style={styles.description}>
        Your development environment is ready.
      </Text>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    padding: 20,
  },
  title: {
    fontSize: 24,
    fontWeight: 'bold',
    marginBottom: 12,
  },
  description: {
    fontSize: 16,
    textAlign: 'center',
  },
});

export default App;

20.1 Code Explanation

• React: Provides the component model used by the application.
• SafeAreaView: Provides safe-area-aware layout behavior on supported platforms; follow current guidance for safe-area handling in new projects.
• Text: Displays text content.
• StyleSheet: Organizes component styling.
• flex: 1: Allows the container to fill available space.
• justifyContent: Aligns children along the main axis.
• alignItems: Aligns children along the cross axis.

21. Running the Application on Android

To run a React Native application on Android, configure the Android SDK and build tools, then start an emulator or connect an Android device.

21.1 Start Metro

npm start

21.2 Build and Launch the Application

Open a second terminal in the project root and run:

npm run android

This command assumes that the project's package.json defines an Android script. The native build may take longer the first time because Gradle needs to resolve dependencies and compile the application.

21.3 Verify the Application

• Confirm that the emulator is running or the device is connected.
• Check that the build completes successfully.
• Confirm that the application opens.
• Review Metro and Android build logs if the app fails to launch.

22. Running the Application on iOS

Local native iOS development requires macOS, a compatible Xcode installation, and the necessary simulator or physical-device configuration.

22.1 Prepare the iOS Environment

1. Install Xcode.
2. Install a compatible iOS Simulator runtime.
3. Install the project's CocoaPods dependencies if required.
4. Open the iOS Simulator.

22.2 Start Metro

npm start

22.3 Launch the Application

Open another terminal in the project root and run:

npm run ios

This command assumes the project defines an iOS script and the native environment is configured correctly.

23. Debugging and Development Tools

Debugging is the process of identifying and correcting errors in application code, native configuration, dependencies, or runtime behavior.

23.1 Common Debugging Tools

23.2 Basic Android Diagnostic Commands

adb --version
adb devices
adb logcat

23.3 Basic iOS Diagnostic Commands

xcode-select -p
xcodebuild -version
xcrun simctl list devices

23.4 A Good Debugging Process

1. Read the complete error message.
2. Identify whether the problem belongs to JavaScript, Metro, dependencies, or native build tools.
3. Check installed tool versions and environment variables.
4. Reproduce the problem using a clear sequence of steps.
5. Apply a targeted fix.
6. Run the application again and confirm the issue is resolved.

24. Environment Configuration and Version Compatibility

React Native projects rely on multiple tools that must work together. A project can fail even when each individual tool is installed if their versions are incompatible.

24.1 Important Compatibility Factors

• React Native version.
• Node.js version.
• JDK version.
• Gradle and Android Gradle Plugin versions.
• Android SDK platform and build-tools versions.
• Xcode version and iOS deployment requirements.
• CocoaPods and native library versions.
• Operating-system and processor architecture.

24.2 Check Tool Requirements

Before upgrading a tool, review the project's React Native version and the official setup guide. The React Native official website provides documentation and links to version-specific information.

Do not automatically upgrade Gradle, the Android Gradle Plugin, the JDK, or native dependencies without checking compatibility. A change in one component may require related changes elsewhere.

25. Common Development Environment Problems

26. Best Practices for Managing a React Native Environment

• Follow the official setup instructions for your React Native version.
• Use supported Node.js and JDK versions.
• Keep project dependencies consistent with the lockfile.
• Use the project's existing scripts instead of assuming every template is identical.
• Keep native tooling compatible with the project configuration.
• Use Git before making significant configuration changes.
• Do not commit private credentials, signing keys, or local machine secrets.
• Keep source files and native configuration organized.
• Read build errors before reinstalling tools or deleting caches.
• Test on Android and iOS separately when supporting both platforms.
• Use emulators for rapid iteration and physical devices for additional validation.
• Document setup instructions for other developers on the team.

27. Practical Exercise: Set Up a React Native Environment

Objective: Configure a basic development environment and run a simple React Native application.

Tasks

1. Install Node.js and verify Node.js, npm, and npx.
2. Install a compatible JDK.
3. Install Android Studio and the required Android SDK components.
4. Configure ANDROID_HOME and verify ADB.
5. Create an Android Virtual Device and launch it.
6. Create a project named EnvironmentPractice using the React Native Community CLI.
7. Open the project in Visual Studio Code.
8. Inspect package.json and identify the available scripts.
9. Start Metro and launch the Android application.
10. Modify the main screen to display a custom welcome message.
11. If a Mac is available, configure Xcode and launch the application on an iOS Simulator.
12. Record any setup errors and describe how you resolved them.

Expected Outcome

After completing the exercise, learners should understand the core tools required for React Native development, create a working project, run the application on an available platform, and recognize where to look when a setup problem occurs.

28. Interview Questions and Answers

Q1. What is a React Native development environment?

Answer: It is the collection of software, runtimes, libraries, SDKs, editors, and platform tools used to create, build, test, and debug React Native applications.

Q2. Why is Node.js required?

Answer: Node.js runs the JavaScript-based development tools used by React Native, including tools involved in project management and Metro.

Q3. What is npm?

Answer: npm is a package manager used to install dependencies and execute project scripts.

Q4. What is npx?

Answer: npx runs package commands without requiring every command-line package to be installed globally.

Q5. What is the React Native Community CLI?

Answer: It is command-line tooling used to create React Native projects and run native development tasks.

Q6. What is Metro?

Answer: Metro is the JavaScript bundler that processes application modules and serves the development bundle.

Q7. What is the purpose of Android Studio?

Answer: Android Studio manages Android SDK packages, emulators, native project configuration, and Android build tools.

Q8. Why does React Native Android development need a JDK?

Answer: Android builds use Gradle and related tooling that require a compatible Java Development Kit.

Q9. What is the Android SDK?

Answer: The Android SDK provides platform APIs and utilities needed to compile, install, and test Android applications.

Q10. What is Xcode?

Answer: Xcode is Apple's development environment for building, running, and debugging native iOS applications.

Q11. Can native iOS builds be performed locally on Windows?

Answer: Local native iOS builds using Xcode require macOS. Windows developers can build Android applications locally and consider supported remote or cloud build workflows for iOS.

Q12. What is CocoaPods?

Answer: CocoaPods is a dependency manager used by many iOS projects to install native libraries.

Q13. What is Watchman?

Answer: Watchman monitors file-system changes and can help supported development tools detect changes efficiently.

Q14. What is Git?

Answer: Git is a version control system that tracks code changes and supports branching and collaboration.

Q15. What is package.json?

Answer: package.json contains project metadata, dependencies, and scripts used by the development workflow.

Q16. How do you create a React Native CLI project?

Answer: Use npx @react-native-community/cli@latest init MyFirstApp after preparing the required development environment.

Q17. How do you start Metro?

Answer: Run npm start in the project root when the generated project defines that script.

Q18. Why is version compatibility important?

Answer: React Native, Node.js, the JDK, Gradle, Android SDK, Xcode, and native dependencies must work together to produce successful builds.

29. Quick Revision Checklist

• JavaScript and React fundamentals understood.
• Node.js, npm, and npx installed and verified.
• React Native Community CLI workflow understood.
• Expo workflow and direct CLI workflow distinguished.
• Code editor installed and configured.
• Compatible JDK installed.
• Android Studio and Android SDK configured.
• ANDROID_HOME and PATH checked.
• Metro bundler workflow understood.
• Git initialized or available for version control.
• React Native project created successfully.
• Android application launched on a device or emulator.
• Xcode and CocoaPods configured when native iOS development is required.
• Common configuration errors and debugging tools understood.

30. Official Learning Resources

• React Native Getting Started — introduction and foundational concepts.
• React Native Environment Setup — Android and iOS development requirements.
• React Native Without a Framework — direct native development workflow.
• Node.js Official Website — Node.js downloads and documentation.
• npm Official Website — package management resources.
• Visual Studio Code — code editor and development tools.
• Android Studio — Android SDK and development tools.
• Android Debug Bridge Documentation — device communication and debugging commands.
• Apple Xcode — native iOS development tools.
• CocoaPods Guides — iOS dependency management.
• Git Official Website — version control documentation.
• React Native Training at JustAcademy — course details and training information.
• Register for a JustAcademy Course Demo — demo registration.
• JustAcademy Official Website — explore courses and learning resources.

31. Conclusion

A well-configured React Native development environment is the foundation for building, testing, and maintaining mobile applications. Node.js, npm, a code editor, Metro, and the selected React Native workflow support JavaScript development, while Android Studio and the JDK provide the tools required for local Android builds. Xcode and related iOS tools are required for local native iOS development.

Understanding the role of each tool makes it easier to create projects, manage dependencies, run applications, and troubleshoot build problems. Follow the official instructions for your React Native version, maintain compatible tooling, and test the application on the platforms you intend to support.

For structured learning, visit JustAcademy's React Native Training course or register for a course demo.