wcag-accessibility
Deep, practical reference for building WCAG 2.2 AA-conformant web UIs — POUR principles, semantic HTML, keyboard operability and visible focus, ARIA done right, color contrast, accessible forms, and screen-reader basics. Includes worked HTML examples and a runnable contrast checker.
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Overview
Accessibility is built in, not bolted on. Most real-world barriers come from a small set of repeated mistakes — non-semantic markup, keyboard traps, invisible focus, low contrast, and unlabeled controls. Fix those and you eliminate the majority of issues that block real users of screen readers, keyboards, magnifiers, and switch devices. This skill is the deep reference: the principles, the decisio
What it covers
- Mental model: POUR
- Semantic HTML first
- Keyboard operability and visible focus
- ARIA — only when HTML can't
- Color and contrast
- Forms, labels, and errors
- Screen-reader & motion basics
- ARIA — patterns and the rules that keep it safe