Creating Our First App in React.js 19

Follow these steps to create and run your first React 19 application.

📌 What is JSX in React.js?

JSX (JavaScript XML) is a syntax extension for JavaScript used in React. It allows developers to write HTML-like code within JavaScript files, making UI development more intuitive.

✔ Example of JSX:

            
import React from 'react';

function Welcome() {
    return 
Hello, World!
;
}

export default Welcome;
            
        

✔ Why Use JSX?

• JSX makes code easier to read and write.
• It allows embedding JavaScript expressions using curly braces { }.
• JSX is compiled into JavaScript using Babel.
• It enhances React's performance with optimizations.

📌 React Project Structure & Naming Convention

A well-structured project makes development easier and scalable. Here’s a recommended structure:

            
my-react-app/
│── public/           # Static files
│── src/              # Source code
│   ├── components/   # Reusable components
│   ├── pages/        # Page components
│   ├── hooks/        # Custom hooks
│   ├── context/      # Context API providers
│   ├── styles/       # CSS and Tailwind styles
│   ├── assets/       # Images and static assets
│   ├── App.jsx       # Root component
│   ├── main.jsx      # Entry point
│── package.json      # Project dependencies
│── vite.config.js    # Vite configuration
            
        

📌 Naming Conventions

• Components: Use PascalCase (e.g., Header.jsx, Sidebar.jsx).
• Hooks: Prefix with use (e.g., useAuth.js, useFetch.js).
• Context: Use a descriptive name (e.g., AuthContext.js).
• CSS Files: Use kebab-case (e.g., global-styles.css).
• Images & Assets: Organize into subfolders (e.g., /assets/logos/).

📌 What to Learn Before React 19

Before diving into React 19, it is essential to understand the following technologies:

• Basic HTML, CSS, and JavaScript
• ES6+ Features (such as arrow functions, spread/rest operators, and async/await)
• Fundamentals of Node.js and npm (Node Package Manager)
• Basic understanding of Git and version control
• Concepts of modular JavaScript and reusable components

🚀 5 Tips to Maximize Your React Course in 2025

To get the most out of your React learning experience, follow these tips:

• Practice Daily: Build small projects regularly to reinforce your understanding.
• Understand React Hooks: Learn hooks like useState, useEffect, and useContext thoroughly.
• Explore State Management: Gain knowledge of Redux, Zustand, or the Context API.
• Follow the Official Documentation: Always refer to the latest React documentation for updates.
• Join the React Community: Participate in forums, GitHub discussions, and online coding groups.

✅ Your First React 19 App is Ready!

Now, visit the localhost link shown in the terminal to see your first React 19 application in action.