React Development Journey Series: Introduction to React.js 🚀

Introduction to React.js

React.js, a JavaScript library developed by Facebook, has revolutionized modern web development. With its declarative syntax and efficient rendering, React.js is a game-changer for building dynamic user interfaces.

Why React.js?

Developers prefer React.js over traditional JavaScript for its virtual DOM, enabling efficient updates and rendering only the necessary components. The component-based architecture fosters reusability, simplifying complex UI development.

Why not Vanilla Javascript?

React.js excels in rendering efficiency with its Virtual DOM, offering a contrast to Vanilla JavaScript's more manual approach. Enhanced state management and a smoother learning curve further distinguish React.js as an attractive choice for developers seeking improved performance and a streamlined development experience.

Feature Vanilla JavaScript React.js
Syntax Traditional imperative syntax Declarative syntax with JSX
Performance Direct DOM manipulation Virtual DOM ensures efficient updates
Scalability Diffcult to handling state in larger projects Component-based architecture enhances scalability
Reusability Limited code reuse capabilities Encourages creation of reusable components
State Management Manual state handling Built-in state management and one-way data flow
Learning Curve Steeper learning curve Relatively smoother learning curve with JSX

Now that we have a good understanding of React, let's create our first React.js project.

Step 1. Set Up Development Environment

Before you start, ensure you have Node.js and npm (Node Package Manager) installed on your machine. You can download them from Once installed, open your terminal or command prompt to verify the installations:

node -v
npm -v

node -v npm -v

We'll use Visual Studio Code as our code editor. You can download from

Step 2. Create React App

Create React App is a command-line tool that helps set up a new React project with a standardized directory structure and build configuration. Install it globally using npm:

npm install -g create-react-app

npm install -g create-react-app

Step 3. Create a New React App

Use Create React App to generate a new project. Replace "my-first-react-app" with your preferred project name:

npx create-react-app my-first-react-app

npx create-react-app

npm audit

Step 4. Navigate to Your Project Directory

Move into the project directory:

cd my-first-react-app

cd my-first-react-app

Step 5. Start the Development Server

Launch the development server to preview your app in the browser:

npm start

Your React app will be accessible at http://localhost:3000.

npm start

Step 6. Modify the code

Open the project folder in Visual Studio Code, go to src/App.js, and replace the existing content with the code provided below.

import './App.css';

function App() {
  return (
    <h1>Welcome to React Development Journey</h1>

export default App;

React App

Congratulations! You've successfully created your first React.js application.🎉

Next Part >> React Development Journey Series: Understand About JSX