React js is a step-by-step tutorial 2023 for beginners on getting started with React.js

Step 1: Set Up the Development Environment Before you can start building React applications, you need to set up your development environment. Follow these steps:

• Install Node.js: React.js requires Node.js, a JavaScript runtime, to be installed on your machine. Download and install the latest version of Node.js from the official website.
• Verify the installation: Open a command prompt or terminal window and run the following command to ensure Node.js is installed correctly:

• Install a package manager: npm (Node Package Manager) comes bundled with Node.js. Verify its installation by running the following command:

Step 2: Create a New React Project Now that your development environment is set up, let’s create a new React project:

• Open a command prompt or terminal window.
• Create a new directory for your project and navigate into it:

• Generate a new React project using the Create React App command-line tool:

• Once the command completes, navigate into the project directory:

Step 3: Run the React Development Server To see your React application in action, you need to start the development server:

• In the command prompt or terminal window, run the following command:

• Wait for the development server to start, and once it does, open your web browser and go to http://localhost:3000. You should see the default React app.

Step 4: Explore the Project Structure Let’s familiarize ourselves with the project structure:

• src folder: This folder contains the source code of your React application.
• src/index.js: This is the entry point of your application.
• src/App.js: This file contains the main component of your application.
• public folder: This folder contains the public assets of your application, such as HTML files and images.

Step 5: Modify the App Component Now, let’s make some changes to the App component to see how React works:

• Open the src/App.js file in a code editor.
• Replace the content of the render() the method with the following JSX code:

• Save the file and go back to your web browser. You should see the updated text on the page.

Step 6: Create a New

Component Let’s create a new component and use it in the App component:

• In the src folder, create a new file called Greeting.js.
• Open Greeting.js and add the following code:

• Open src/App.js and add an import statement for the Greeting the component at the top:

Replace the paragraph element in the App component’s render() method with the Greeting