Documentation · ESSENTIAL
MDN HTML reference
HTML elements, attributes, forms and document structure, with reference material and browser notes.
developer.mozilla.org THE WEB, WELL BOOKMARKED
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Documentation
HTML Living Standard
The maintained HTML specification from WHATWG, covering the language and browser processing rules.
html.spec.whatwg.orgDocumentation
ECMAScript specification
The normative JavaScript language specification, useful when you need exact language semantics.
tc39.esLearning
Learn HTML
A practical course in document structure, semantic elements and accessible HTML patterns.
web.dev