HTML & CSS Cheat Sheet
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This section documents general HTML5 and CSS concepts — it is not tied to any specific framework or library. This content was generated with the assistance of AI. Verify it against current MDN documentation and browser-support tables (caniuse.com) before relying on it in production, since HTML/CSS features and browser support continue to evolve. |
A single-page, color-coded summary of the most commonly used HTML5 elements and CSS techniques covered by this reference — handy for quick memorization or as a printable desk reference. Each box groups one topic (HTML5 structure, the box model, Flexbox/Grid basics, selectors and specificity, transitions and animation, and form accessibility) with its most essential syntax and a compact example.
For the full syntax, every option, and additional examples, see the dedicated pages: HTML5 Structure and Semantics, SEO, Layout: Float, Flexbox & Grid, Positioning, The Box Model, Selectors & Specificity, Variables & Media Queries, Theming, Transitions, Animations, SVG Styling & Animation, Forms, Forms: Accessibility & Validation, Performance: Loading, Performance: Build Optimization, Appendix: HTML Elements, and Appendix: CSS Properties.