Node.js Projects - Programming

You can use the built-in http module or, more commonly, Express. You define routes for HTTP methods like GET and POST, parse incoming JSON bodies, run your logic or database queries, then send back a status code and response. Express simplifies routing, middleware, and error handling compared to the raw http module.

You install a driver or ORM for your database, such as pg for PostgreSQL or mongoose for MongoDB, then create a connection using credentials from environment variables. Most drivers offer a connection pool that reuses connections efficiently. Your route handlers run queries and return the results as JSON.

Node exposes them in process.argv, an array where the first two entries are the node executable and script path, and the rest are user arguments. For anything beyond simple cases, libraries like commander or yargs parse flags and options, giving you named arguments and help text with less manual work.

The http module works but leaves you to handle routing, parsing, and middleware by hand. Express provides a clean routing API, easy middleware for tasks like body parsing and authentication, and error handling patterns. It speeds up development and is widely understood, which helps team collaboration.

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