HTML Foundations
The structural layer of the web. Semantic markup, document structure, forms, media, and the DOM -- the foundation everything else builds on.
The markup language that structures every web page — what it is, why it matters, and how the browser actually parses it.
The anatomy of every HTML document — DOCTYPE, head, body, and the metadata that controls how browsers, search engines, and social platforms see your page.
Headings, paragraphs, emphasis, lists, and the content model that determines which elements can nest inside which — the rules that govern every HTML document.
Anchor elements, URL anatomy, navigation patterns, and the difference between links and buttons — the web's fundamental interaction.
Images, video, audio, iframes, and responsive media — how to embed rich content without killing performance or accessibility.
HTML form elements, input types, validation attributes, and accessibility — the building blocks of every user interaction on the web.
HTML tables for data presentation — proper structure, accessibility, and when to use tables vs. other layout techniques.
Landmark elements, sectioning content, ARIA roles, and how semantic structure powers accessibility, SEO, and browser features like reader mode.
Validation tools, common errors, performance patterns, SEO fundamentals, and the production checklist every page should pass before shipping.