# mjavascript/mastering-modular-javascript

📦 Module thinking, principles, design patterns and best practices.

Repository: https://github.com/mjavascript/mastering-modular-javascript
Canonical: https://ross.abutalabs.com/products/mastering-modular-javascript
Homepage: https://mjavascript.com
Language: HTML
License: NOASSERTION
License Family: other
Topics: book, book-series, javascript, modules, packages, modular
Last push: 2020-10-14T17:54:43+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3494, "days_push": 2149, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3976, forks 210 (observed 2026-08-28T04:08:30.943897+00:00)

## What it is
An open-source book, 'Mastering Modular JavaScript', the second in the Modular JavaScript series, teaching module thinking, design patterns, and best practices for modular JavaScript application development with ES6. Its chapters and code samples are freely readable online in HTML format under a Creative Commons license.

## Use cases
- learn how to structure a JavaScript codebase into modules
- understand ES6 module patterns and best practices
- find design patterns for scaling out large JavaScript applications
- read a free book on modular JavaScript application development
- improve code organization in a growing JavaScript project
- study real-world examples of modular JavaScript

## When to choose
- you want a free, in-depth written resource on JavaScript modularity and ES6
- you are designing or refactoring a JavaScript application's module architecture
- you prefer learning from a book with real-world patterns and explanations

## When to avoid
- you need interactive tutorials or video courses rather than prose
- you need up-to-date coverage of modern tooling beyond ES6-era practices
- you are looking for runnable software rather than educational content

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: web-development, developer-tools, tutorials
- platform: cross-platform
- tags: javascript, es6, modularity, book, design-patterns, free-to-read, web-server

## Member repositories
- mjavascript/mastering-modular-javascript (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:30.943897+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:24:19.580003+00:00, confidence not recorded.
  - readme: https://github.com/mjavascript/mastering-modular-javascript (fetched 2026-08-28T04:08:30.943897+00:00, sha a2781dac1124)
  - homepage: https://mjavascript.com (fetched 2026-08-29T09:17:48.531567+00:00, sha d887eabec747)
- Data as of 2026-08-30T08:39:29.467469+00:00.