Category: 01. Express Js

Express can use various middleware for functionalities like authentication, logging, etc. For example, to use the morgan logging library: Then, in app.js:

To serve static files like HTML, CSS, and JavaScript, use: Create a public directory and put your static files there.

Add an error handling middleware to catch and respond to errors:

You can add more routes to handle different URLs and HTTP methods. For example:

Start your server using Node.js: Visit http://localhost:3000 in your browser to see “Hello World!” and use a tool like Postman or curl to test the /data POST endpoint.

Create a file named app.js (or index.js) in your project directory and add the following code:

Install Express.js using npm.

Run the following command to create a package.json file, which will manage your project’s dependencies.

a. Install Node.js Download and install Node.js from nodejs.org. This will include npm (Node Package Manager), which you’ll use to manage packages. b. Create a Project Directory