A collection of hand-picked HTML and CSS style guides.
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Google HTML / CSS Style Guide
This document defines formatting and style rules for HTML and CSS. It aims at improving collaboration, code quality, and enabling supporting infrastructure. It applies to raw, working files that use HTML and CSS, including GSS files. Tools are free to obfuscate, minify, and compile as long as the general code quality is maintained.
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CSS Guidelines
High-level advice and guidelines for writing sane, manageable, scalable CSS.
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Code Guide
Standards for developing consistent, flexible, and sustainable HTML and CSS.
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The complete CSS Style Guide for your next project
I first drafted this CSS Style Guide some years ago while working on Pundit and Muruca. Since that first version, I’ve been constantly updating it and adding new sections. This Style Guide reflects how we manage and write CSS at Net7 and it’s a crucial resource to keep projects maintainable, especially complex, long term projects and design systems’ code. The Style Guide is also a good resource to involve new developers to the team and align them to our way of writing CSS.
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Principles of writing consistent, idiomatic CSS
The following document outlines a reasonable style guide for CSS development. These guidelines strongly encourage the use of existing, common, sensible patterns. They should be adapted as needed to create your own style guide.
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Airbnb CSS / Sass Styleguide
A mostly reasonable approach to CSS and Sass.
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Frontend Guidelines
Some HTML, CSS and JS best practices.
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Dropbox (S)CSS Style Guide
Dropbox’s (S)CSS authoring style guide.
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HTML Style Guide
A style guide which helps you write better, performant, structured, scalable and maintainable HTML.