JavaScript Reference Guide: JS Module Ecosystem

JavaScript Reference Guide: JS Module Ecosystem

This guide explains how to create and use modules in JavaScript applications using the module systems available in the JavaScript ecosystem.

This guide explains how to create and use modules in JavaScript applications using the module systems available in the JavaScript ecosystem.

JavaScript modules are individual parts of a JavaScript program that can be tested on their own and reused in other projects. They’re used to improve the organization of code.

In this article, you’ll learn how to create and use modules in your JavaScript applications using the module systems available in the JavaScript ecosystem.

What is a module system?

In its early days, JavaScript was used mainly to add interactivity to a webpage. However, JavaScript evolved and was used by developers to create complex web applications running on the server-side and client side (thanks to projects like Helma and Jaxer).

As many of us who have worked on server-side code know, this code in particular can be difficult to maintain, test, and debug if not structured well because of the amount of interaction that takes place among the code itself.

This was a problem for JavaScript as the application grew because it did not have a standard way to structure code into distinct, functional parts that could be tested and maintained single-handedly, nor did it include other JavaScript code in projects.

That is, of course, until modules came along.

However, even though modules separate and structure code, there was still a need for an ecosystem within which to share these modules.

The inspiration to create such an ecosystem was further fueled by the fact that programming languages like Python, Java, and Ruby all have ecosystems for sharing software packages, which can range from small-scale to full-blown applications.

To that end, Kevin Dangoor created the ServerJS group in hopes of making the collection of publicly available JavaScript code more valuable. Today, ServerJS is known as CommonJS.

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