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ryanmcdermott/clean-code-javascript

Analysis updated 2026-05-18

94,296JavaScriptAudience · developerComplexity · 1/5LicenseSetup · easy

TLDR

A guide translating Clean Code principles into JavaScript examples, showing bad vs. good code for naming, functions, classes, testing, and error handling.

Mindmap

mindmap
  root((clean-code-javascript))
    What it covers
      Naming variables
      Function design
      Classes and objects
      SOLID principles
    How to use it
      Code review reference
      Learning to refactor
      Team onboarding
    Code patterns
      Bad vs good examples
      JavaScript idioms
      Error handling
    Topics included
      Testing practices
      Concurrency
      Formatting
      Comments
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Code map

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filefunction / class

What do people build with it?

USE CASE 1

Review pull requests against clean code principles and discuss code quality with teammates.

USE CASE 2

Learn how to refactor messy JavaScript code into readable, maintainable versions.

USE CASE 3

Onboard new developers by using concrete examples to teach your team's code standards.

USE CASE 4

Study object-oriented design patterns with JavaScript-specific examples instead of Java.

What is it built with?

JavaScript

How does it compare?

ryanmcdermott/clean-code-javascriptmicrosoft/web-dev-for-beginnersmui/material-ui
Stars94,29695,71598,285
LanguageJavaScriptJavaScriptJavaScript
Setup difficultyeasyeasyeasy
Complexity1/51/52/5
Audiencedevelopergeneraldeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
Use freely for any purpose including commercial, as long as you keep the copyright notice.

In plain English

clean-code-javascript is a long article, kept as a markdown document in this repository, that translates the ideas from Robert C. Martin's book Clean Code into examples written in JavaScript. The book is a well-known guide on how to write code that other people, including your future self, can comfortably read, change, and reuse. Because the original examples in the book are in Java, the author of this repo went through the principles and rewrote them with JavaScript-style examples so JavaScript developers can apply the same advice in their own work. The README is structured as a table of contents covering naming variables, designing functions, organising objects and classes, the SOLID set of object-oriented design principles, testing, concurrency, error handling, formatting, and comments. Each section explains a single guideline in plain language and shows a Bad version of a small piece of JavaScript followed by a Good version that follows the rule. Examples cover ideas such as using meaningful names, keeping functions small and focused, avoiding magic numbers, using default parameters, limiting how many arguments a function takes, and not repeating context that is already implied by the surrounding object. The author is clear that this is not a strict style guide and that not every rule has to be followed in every situation, the document is meant as a reference to discuss code quality with teammates and to assess your own JavaScript. Someone might use it while reviewing pull requests, learning to refactor, onboarding into a team that values readable code, or studying object-oriented design with concrete examples.

Copy-paste prompts

Prompt 1
Show me how to refactor this JavaScript function to follow clean code principles: [paste function]. Use the clean-code-javascript repo as a reference.
Prompt 2
I'm reviewing a pull request. Which clean code principles from clean-code-javascript should I check for in this code: [paste code snippet]?
Prompt 3
Explain the SOLID principles using JavaScript examples from the clean-code-javascript repo.
Prompt 4
Help me rename these variables to be more meaningful according to clean-code-javascript guidelines: [paste variable names and context].
Prompt 5
What does clean-code-javascript say about function length and how many parameters a function should take?

Frequently asked questions

What is clean-code-javascript?

A guide translating Clean Code principles into JavaScript examples, showing bad vs. good code for naming, functions, classes, testing, and error handling.

What language is clean-code-javascript written in?

Mainly JavaScript. The stack also includes JavaScript.

What license does clean-code-javascript use?

Use freely for any purpose including commercial, as long as you keep the copyright notice.

How hard is clean-code-javascript to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is clean-code-javascript for?

Mainly developer.

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