html

An HTML reference for building accessible, semantic web pages — document structure, text, lists, links & images, tables, forms, and the semantic tags that convey meaning to both browsers and screen readers.

An Emmet abbreviation reference for anyone writing HTML/CSS by hand in VSCode, covering structure expansion, nesting & grouping, attribute and counter shortcuts, and CSS shorthand that turns long markup into a single keystroke.

An HTML meta tags reference for controlling how a page appears in search and on social — SEO meta, Open Graph & Twitter Cards for sharing, viewport & responsive/theme settings, PWA manifest & theme-color, and security headers such as CSP.

XPath selector reference: node paths, predicates, axes, string and node functions, wildcards and operators, plus examples for HTML and XML scraping.

HTML character entities in both named and numeric forms, for symbols, quotes, arrows, math and Greek letters. For escaping user input against XSS/breakage and for rendering special characters reliably.