Setting Up Your First React App with Create React App

🚀 Setting Up Your First React App with Create React App

React is a JavaScript library for building user interfaces, and Create React App (CRA) is the easiest way to start building a React application without having to set up complex tools and configurations manually.


✅ Prerequisites

Before you start, make sure you have these installed on your machine:


Node.js (comes with npm): Download here


A code editor (e.g., Visual Studio Code)


🛠️ Step 1: Install Create React App

Open your terminal (Command Prompt, PowerShell, or Terminal on Mac/Linux), and run this command:


bash

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

npx is a tool that comes with Node.js.


create-react-app is the package that sets everything up for you.


my-first-react-app is the name of your project folder (you can change this to anything you like).


📦 This command will:


Create a new project folder.


Install React and other necessary tools.


Set up a complete React project structure.


📂 Step 2: Navigate into Your Project Folder

Once the setup is complete, go into your project directory:


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cd my-first-react-app

▶️ Step 3: Start the Development Server

Now you can launch your app in your browser:


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npm start

This will:


Compile your React code.


Open the app in your browser (usually at http://localhost:3000).


You’ll see the default React welcome page — and just like that, you're running your first React app! 🎉


🧭 Folder Structure (Brief Overview)

Here’s what you’ll find inside your project:


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my-first-react-app/

├── node_modules/       # App dependencies

├── public/             # Static files

├── src/                # React components & code

│   └── App.js          # Main component

├── package.json        # Project metadata & dependencies

└── README.md           # Project description

🛠️ Step 4: Start Editing!

Open src/App.js in your code editor and change the text. For example, replace:


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<h1>Hello World</h1>

Then save it — your browser will automatically refresh with your changes thanks to Hot Reloading!


🔚 Wrapping Up

That’s it! You’ve just created and run your first React app using Create React App. Now you can start building components, adding styles, and making your app interactive.

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What is React.js? A Beginner’s Introduction

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