WCAG 2.2 Accessibility Compliance Guide

Best Practice: WCAG 2.2 Accessibility Compliance

The Web Content Accessibility Guidelines (WCAG) 2.2 are the W3C standard for making web content accessible to people with disabilities. Published as a W3C Recommendation in October 2023, WCAG 2.2 organizes requirements under four principles: content must be Perceivable, Operable, Understandable, and Robust (POUR). Each guideline has testable success criteria rated at conformance levels A, AA, and AAA. AA is the common legal and procurement target worldwide. Compliance matters because it broadens reach, reduces legal exposure, and improves usability for all users.

Step-by-Step Implementation Guidance

Pick a target conformance level, usually AA, and define the scope of pages and flows.
Map your interface against the WCAG 2.2 success criteria, including the new ones such as focus appearance and dragging alternatives.
Use semantic HTML and correct ARIA only where native elements fall short.
Ensure full keyboard operability, visible focus, and sufficient color contrast.
Provide text alternatives for images, captions for media, and labels for form controls.
Test with automated tools, then manually with keyboard and screen readers.
Document conformance and re-test on every release.

Common Mistakes Teams Make When Ignoring This Practice

Relying only on automated scanners, which catch a minority of issues.
Adding ARIA roles that override correct native semantics.
Missing keyboard focus management in modals and custom widgets.
Using color alone to convey meaning.
Treating accessibility as a one-time audit instead of a continuous practice.

Tools and Techniques That Support This Practice

axe-core, WAVE, and Lighthouse for automated checks.
Screen readers such as NVDA, JAWS, and VoiceOver for manual testing.
Keyboard-only navigation passes.
Contrast checkers and the ARIA Authoring Practices Guide.

How This Practice Applies to Different Migration Types

Cloud Migration: Re-validate accessibility after CDN or rendering changes that alter markup delivery.
Database Migration: Confirm dynamic, data-driven content still exposes correct labels and structure.
SaaS Migration: Audit the new vendor's UI for AA conformance before committing.
Codebase Migration: Re-test components after porting to a new framework, since accessibility often regresses.

Checklist

Target conformance level chosen (usually AA).
Semantic HTML and minimal, correct ARIA.
Full keyboard operability with visible focus.
Color contrast meets thresholds.
Text alternatives and captions provided.
Manual screen-reader testing completed.
Conformance documented per release.

WCAG 2.2 Accessibility Compliance