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.