Lecture 253:- Rendering Our First Page

To render our first page using Express, we can do the following:

1. Install Express: We need to have the express module installed. If it's not already installed, we can install it using the following command in the terminal:

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   npm install express

2. Create a new file: Create a new file with the name app.js and add the following code:

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   const express = require('express'); const app = express(); app.get('/', (req, res) => {  res.send('Hello World!'); }); app.listen(3000, () => {  console.log('Server listening on port 3000'); });

   Here, we require the express module and create an instance of it, which we store in the app constant. We then define a route for the root URL (/) using the get() method, and in the callback function, we send the response 'Hello World!' using the send() method. Finally, we start the server by calling the listen() method and passing it the port number (in this case, 3000).

3. Run the file: To run the app.js file, we need to run the following command in the terminal:

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   node app.js

4. View the output: Open a web browser and navigate to http://localhost:3000/. The page should display the message 'Hello World!'.