run on localhost node js

Step 1: Install Node.js - Download and install Node.js from the official website: https://nodejs.org/ - Follow the installation instructions for your operating system.

Step 2: Create a Node.js Project - Open your terminal or command prompt. - Navigate to the directory where you want to create your project. - Run the following command to initialize a new Node.js project: npm init -y

Step 3: Install Express.js - Run the following command to install Express.js as a dependency for your project: npm install express

Step 4: Create an Express.js App - Create a file (e.g., app.js) in your project directory. - Open app.js and require Express: javascript const express = require('express'); const app = express();

Step 5: Define a Route - Define a simple route that responds with "Hello, World!" when the root URL is accessed: javascript app.get('/', (req, res) => { res.send('Hello, World!'); });

Step 6: Start the Server - Add code to start the server and listen on a specific port (e.g., 3000): javascript const PORT = 3000; app.listen(PORT, () => { console.log(`Server is running on http://localhost:${PORT}`); });

Step 7: Run the Node.js App - In your terminal, run the following command to start your Node.js app: node app.js

Step 8: Access the App in a Browser - Open your web browser and go to http://localhost:3000. - You should see the message "Hello, World!" displayed on the page.

Step 9: Stop the Server - In the terminal, press Ctrl + C to stop the Node.js server.

Note: This is a basic setup, and you can expand your Node.js app by adding more routes, middleware, and functionality based on your requirements.