5 NodeJS Features You Probably Missed

Are you wasting time installing unnecessary libraries and debugging your NodeJS applications the wrong way? Here are five built-in NodeJS features that can make your life easier and reduce your project's dependencies.

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1. Dotenv Replacement

Typically, we use the dotenv library to manage environment variables. However, NodeJS now offers native support for this.

Using --env-file Option:

node --env-file=.env app.js

Using process.loadEnvFile (NodeJS v21+):

// server.js
process.loadEnvFile('.env');

These methods eliminate the need for the dotenv library, streamlining your development process.

2. Nodemon Replacement

Instead of installing nodemon to automatically restart your app on changes, use NodeJS's built-in watch mode.

Run with --watch Option:

node --watch app.js

This built-in feature provides the same functionality as nodemon without additional dependencies.

3. Built-in Test Runner

Writing tests can be tedious, especially for side projects. NodeJS now includes a built-in test runner, removing the need for external libraries.

Example Test File:

import { test, assert } from 'node:test';

test('simple test', (t) => {
  assert.strictEqual(1 + 1, 2);
});

Run Tests:

node --test

No more excuses for skipping tests!

4. UUID Generation

Generating unique values is common in many projects. Instead of using the uuid package, leverage NodeJS's crypto module.

Generate UUID:

import { randomUUID } from 'crypto';

const id = randomUUID();
console.log(id);

5. Built-in Debugger

Many developers still use console.log for debugging, which is inefficient. NodeJS offers a powerful built-in debugger.

Run in Inspect Mode:

node --inspect app.js

Using Chrome DevTools:

1. Open Chrome and go to DevTools.
2. Click the NodeJS icon.
3. Use breakpoints and inspect objects efficiently.

Conclusion

Happy Coding 👋!
Thank you for reading the entire article; hope that's helpful to you.