What main library or tool do you use in your projects?

In Node.js projects, I often use the Express.js library — a minimalistic and flexible web framework for building server applications and APIs. It simplifies routing, handling requests and responses, middleware, and much more.

Example of a simple server with Express:

const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.send('Hello, world!');
});

app.listen(3000, () => {
  console.log('Server started on port 3000');
});

Besides Express, I often use:

• Mongoose for working with MongoDB
• dotenv for managing environment variables
• Jest or Mocha for testing

The choice of tools depends on the project tasks, but Express is a basic and very popular choice.