Introduction to Node.js - What Is a Node Module and Non-Blocking I/O

6m 18s

This practical lesson offers an introduction to what is a Node module and goes into greater detail by working with one of Node's built-in modules. In addition, this lesson explains how Node's non-blocking I/O operations differ from blocking I/O operations.

Learning Objectives

  • Understand what a module is
  • Learn about the built-in FileSystem module
  • Learn how to use the FileSystem readFile method to read a text file
  • Learn how Node uses non-blocking I/O to allow for JavaScript execution to continue on its current thread
  • Learn how to use a blocking method in Node.js
  • Understand the differences in the order of output between non-blocking and blocking methods

Intended Audience

This lesson is intended for anyone who wants to learn about Node.js.


To get the most out of this lesson, you should have an interest in Node.js in general.

About the Author
Farish Kashefinejad, opens in a new tab
Full-Stack Development Content Creator
Learning paths

Farish has worked in the EdTech industry for over six years. He is passionate about teaching valuable coding skills to help individuals and enterprises succeed.

Previously, Farish worked at 2U Inc in two concurrent roles. Farish worked as an adjunct instructor for 2U’s full-stack boot camps at UCLA and UCR. Farish also worked as a curriculum engineer for multiple full-stack boot camp programs. As a curriculum engineer, Farish’s role was to create activities, projects, and lesson plans taught in the boot camps used by over 50 University partners. Along with these duties, Farish also created nearly 80 videos for the full-stack blended online program.

Before 2U, Farish worked at Codecademy for over four years, both as a content creator and part of the curriculum experience team.

Farish is an avid powerlifter, sushi lover, and occasional Funko collector.

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