W3C Web Accessibility Initiative (WAI)
W3C
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It is the source of truth: WCAG, ARIA, and the official reasoning behind every accessibility rule. Use it to resolve the exact requirement when a checklist is not specific enough. Denser than WebAIM, so come here for authority rather than for your first read.
What you will learn
- Where the accessibility standards come from
- Finding the authoritative requirement
How to study it
- Documentation is not for linear reading. Learn the mental model of the tool elsewhere first.
- Then use the docs as lookup while you build something real, answering specific questions as they arise.
- Keep it open in a tab during practice. It earns its value in application, not memorization.