set up node js server express

  1. Install Node.js and npm:
  2. Download and install Node.js from the official website: https://nodejs.org/

  3. npm is included with Node.js.

  4. Create a new project folder:

  5. Open your terminal or command prompt.
  6. Navigate to the directory where you want to create your project.
  7. Run mkdir myNodeServer to create a new folder for your Node.js project.

  8. Move into the project folder using cd myNodeServer.

  9. Initialize the project and create a package.json file:

  10. Run npm init -y to initialize a new Node.js project with default settings.

  11. This will create a package.json file in your project folder.

  12. Install Express:

  13. Run npm install express --save to install Express and add it to the dependencies in your package.json file.

  14. Create a simple Express server:

  15. Create a new file, e.g., app.js in your project folder.

  16. Open app.js in a text editor and require Express: javascript const express = require('express'); const app = express(); const port = 3000; // You can choose any available port

  17. Define a route and start the server:

  18. Add a simple route that responds with "Hello, World!" when you access the root URL: javascript app.get('/', (req, res) => { res.send('Hello, World!'); });

  19. Start the server:

  20. Add the following code to start the server and listen on the specified port: javascript app.listen(port, () => { console.log(`Server is listening at http://localhost:${port}`); });

  21. Run the server:

  22. In your terminal, run node app.js to start the server.
  23. Open your web browser and go to http://localhost:3000 to see the "Hello, World!" message.

Now you have a basic Node.js server set up with Express, and it's responding with "Hello, World!" when you access the root URL.