Core Concepts
Understand Node.js fundamentals: event loop, process.nextTick, and how it differs from browser JS.

Join the AI Workshop to learn more about AI and how it can be applied to web development. Next cohort February 1st, 2026

The AI-first Web Development BOOTCAMP cohort starts February 24th, 2026. 10 weeks of intensive training and hands-on projects.

Understanding how Node.js works under the hood will make you a better developer. These core concepts explain the event loop, the differences between Node.js and browser JavaScript, and when to use Node.js.

In this section you’ll learn the fundamental concepts that power Node.js applications.

Lessons in this unit:

0: ▶︎ Introduction
1: The Node Core Modules
2: Differences between Node and the Browser
3: Node, the difference between development and production
4: The Node.js Event Loop
5: A brief history of Node.js
6: Understanding process.nextTick()
7: Understanding setImmediate()
8: How to check the current Node.js version at runtime
9: Why should you use Node.js in your next project?
10: Introduction to Node.js