About w3c.wiki

w3c.wiki is an independent, vendor-neutral encyclopedia of Web standards. Entries cover HTML, CSS, JavaScript Web APIs, WCAG, ARIA, WebAuthn, and adjacent specifications.

This site is not affiliated with, endorsed by, or sponsored by the World Wide Web Consortium. For official specifications and authoritative text, visit w3.org.

What you will find here

• Plain-language reference cards keyed to a normative spec URL.
• What a passing implementation looks like for end users.
• Links to multiple browser engines (Chromium, WebKit, Gecko).
• Cross-references between related elements, properties, and SCs.

What you will not find here

• Commercial calls to action or "scan your site" pitches.
• Step-by-step tutorials — entries are reference cards.
• User accounts, comments, or other UGC.

Editorial principles

• Vendor-neutral. No browser, framework, or testing tool is privileged.
• Spec-first. Every entry cites the normative URL and verification date.
• Transferable. The site, its content, and its infrastructure can be handed to a new operator without rewrites — see editorial independence.

Read the trademark disclosure for the full list of marks referenced and the legal posture of this publication.