Document language Heading hierarchy Main landmark Navigation landmark Complementary landmark Contentinfo landmark Search landmark Region landmark Skip links Landmark labeling

Image alt text Decorative images Button accessible names Link purpose Form label association aria-label aria-labelledby aria-describedby Accessible name precedence Name-role-value

Native keyboard support Logical tab order Visible focus indicator Focus trapping Focus restoration Skip repetitive content Roving tabindex tabindex zero Negative tabindex Avoid positive tabindex

Required fields Fieldset and legend Autocomplete tokens Input purpose Inline validation errors Error summary aria-invalid aria-errormessage Instructions before input Accessible success feedback

aria-expanded aria-controls aria-current aria-live aria-busy aria-hidden aria-pressed aria-selected aria-modal Disclosure pattern

Captions Audio transcripts Audio descriptions Color contrast Non-color cues Text resize Reflow Reduced motion High contrast support Accessible SVG

Table headers Scope attribute Caption element Complex table headers Sortable table state Dialog focus Tabs pattern Accordion pattern Status messages Live region politeness

Keyboard-only testing Screen reader smoke test Zoom 200 percent Reflow at 320 CSS px Contrast testing Focus order review Accessible name inspection Automated axe scan Manual WCAG review Regression accessibility tests