Google HTML/CSS Style Guide

Official Google HTML and CSS coding standards for consistent web development.

Quick Reference

Golden Rules

1. Semantic HTML — use appropriate elements
2. Lowercase everything — tags, attributes, values
3. Close all tags — even optional ones
4. Use meaningful class names — describe purpose, not appearance
5. Accessibility first — ARIA, alt text, semantic structure
6. Mobile-first CSS — start with mobile, enhance for desktop
7. BEM or similar — consistent naming methodology

HTML Conventions (Preview)