Idiomatic.js (often referred to as the Principles of Writing Consistent, Idiomatic JavaScript) is a popular, open-source style guide repository maintained by Rick Waldron. It defines best practices for writing clean, readable, and consistent JavaScript code, ensuring that collaborative projects maintain a uniform style.

GitHub +3

Key details about idiomatic.js:

Purpose: To define a standard "idiomatic" style—using the natural, most effective patterns of the JavaScript language.

Focus Areas: The manifesto covers whitespace (tabs/spaces), naming conventions, conditional evaluation, comments, and structure.

Core Principles: It encourages using consistent formatting (like 2-space indents), avoiding unnecessary complexity, and ensuring code is readable by human teams.

Origin: Often cited as a foundational resource for JavaScript teams to enforce consistency, reducing disagreements over code style.

GitHub +5

It is widely considered a key reference for maintaining high-quality code in large projects, as noted in discussions on platforms like A List Apart and Reddit.