A Comprehensive Guide to Create React App

Unlock the full potential of web development with our in-depth guide on how to create a React app using Create React App.

Introduction: Embarking on your journey with React can be both exciting and challenging. React.js, developed by Facebook, is a powerful JavaScript library for building user interfaces. It allows developers to create reusable UI components and build robust, interactive web applications. As you stand at the beginning of this transformative library, the question arises: where do you start? The solution to this conundrum lies in “Create React App,” a robust tool developed by the Facebook team to simplify the initiation of React projects. In this detailed tutorial, we’ll not only cover the basics but also provide a comprehensive understanding of how to leverage “Create React App” for efficient React development.

Understanding React.js: React.js is a declarative, efficient, and flexible JavaScript library for building user interfaces. Its component-based architecture allows developers to create modular and reusable UI elements, making it easier to maintain and scale applications. React’s virtual DOM ensures optimal performance by minimizing the need for direct manipulation of the actual DOM. With a strong community and widespread adoption, React has become a go-to choice for building modern web applications.

Benefits of React.js:

  1. Component-Based Architecture: Develop modular UI components that can be reused across different parts of your application, promoting maintainability and scalability.
  2. Virtual DOM: React’s virtual DOM optimizes rendering, improving performance by minimizing unnecessary updates to the actual DOM.
  3. Unidirectional Data Flow: Easily manage state and control the flow of data within your application, reducing bugs and making it simpler to understand how data changes over time.
  4. React Native: Extend your React skills to mobile app development with React Native, allowing you to build cross-platform applications using the same React principles.
  5. Active Community: Benefit from a large and active community of developers, providing support, sharing best practices, and contributing to the continuous improvement of React.

Understanding Create React App: Create React App is more than just a convenient tool – it’s a catalyst for a seamless React development experience. Designed with user-friendliness in mind, it streamlines the setup process and eliminates much of the configuration hassle. Let’s dive deep into the fundamental aspects of this tool, ensuring you grasp its capabilities fully.

Installing “Create React App” Globally: Before we can harness the power of the create-react-app command, we need to install “Create React App” globally. On your Ubuntu terminal, execute the following command:

The -g flag ensures a global installation, allowing you to use “Create React App” from any location within your system. As the installation progresses, Ubuntu might prompt you for your password.

Handling “Command ‘npm’ not found” Error: If you encounter the error message “Command ‘npm’ not found” during the installation process, it indicates that Node Package Manager (npm) is not installed on your system. To resolve this issue, you need to install Node.js, which includes npm as a package manager.

Here’s how you can install Node.js on Ubuntu:

Step 1: Open your terminal and update the package list with the following command:

Step 2: Install Node.js and npm using the following command:

Step 3: Verify the installation by checking the Node.js and npm versions:

Ensure that the installation process completes without any errors. Once Node.js and npm are successfully installed, proceed to run the “npm install -g create-react-app” command and continue with the rest of the tutorial.

This additional step ensures that you have the necessary tools for React development on your system, addressing the “Command ‘npm’ not found” error.


Screenshot 1: Terminal showing the installation of Create React App globally

Creating Your First React App: Now that “Create React App” is globally installed, let’s generate our first React project. In your terminal, enter the following command:

Here, create-react-app is the command, and react_demo is the chosen project name. You can select any name without uppercase characters. This command sets up a basic React project structure, complete with essential dependencies.

Screenshot 2: Terminal showing the use of Create React App to create a new project

After the project generation is complete, your terminal will provide instructions on the next steps. Navigate to your project directory and launch your React app with the following commands:

Executing these commands will automatically open your React app in the default web browser.

Exploring Your React App: Congratulations! You’ve successfully created a React app using “Create React App.” Take some time to explore the project structure and understand the generated files. The src directory contains your main application code, while the public directory houses static assets.

Screenshot 4: File Explorer showing the structure of the generated React project

Conclusion: This tutorial has equipped you with the essential knowledge to initiate your React journey using “Create React App.” As you delve deeper into React development, consider exploring our other tutorials for advanced concepts and techniques.