Welcome to the fantastically engaging world of web development with React – a JavaScript library that has revolutionized the entire approach to developing user interfaces. One of the best things about React lies in its compatibility with a vibrant ecosystem and immense developer freedom. But before we unleash the power of React, it is essential to master the fundamentals. In this guide, we will be navigating through the process of running a React environment and delve into the nitty-gritty of Command Line for local port hosting delegation.

What is React?

Before we dive deeper, it merits a quick introduction to React. Developed by Facebook, React is a declarative, efficient, and flexible JavaScript library used in building user interfaces. Its component-based structure allows developers to write reusable modules, leading to cleaner, easier to maintain code.

Getting Started:

Running the local environment becomes incredibly simple with Create React App (CRA), a tool that sets up your development environment ensuring you can focus on the code rather than setting up the environments.

Installing React:

First and foremost, make sure you have Node.js and npm (Node Package Manager) installed in your system by running the following command line:

node -v
npm -v

If you have Node.js and npm set up, you’re all set to kickstart your React technology journey. Install the ‘create-react-app’ package using npm as follows:

npm install -g create-react-app

This process installs the create-react-app command globally on your system.

Creating and Running a React App Locally:

To create a new React application, navigate to the directory where you want your project located via the command line, then run:

npx create-react-app my-app

Replace ‘my-app’ with your preferred app name. After successful creation, navigate into your new project’s directory with:

cd my-app

Now you are inside your React app, let’s start it with:

npm start

Your React app should now be running on your local machine.

Hosting Delegation via Command Line:

During development, you may need to change the default localhost port (typically, port 3000).

To run your application on a different port, modify the start script in your ‘package.json’ file:

"scripts": {
  "start": "PORT=3000 react-scripts start"

Finally, run ‘npm start’ to start the local server. Your React app now will be running on your specified port.


React has taken the Dev community by storm because of its abundant functionality, efficiency, and usability. The process of setting up a React project might seem daunting initially, but we assure you, it gets more comfortable. And remember, having a strong understanding of how the environment works will help immensely as you dive deeper into the React ecosystem. All the nuances that were an obstacle initially will soon become second nature. So keep exploring, Happy coding!

Marco Lopes

Excessive Crafter of Things


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