Accessibility Test Scanner

Overview

Validate web applications against WCAG 2.1/2.2 accessibility standards covering perceivability, operability, understandability, and robustness. Combines automated scanning with axe-core, Pa11y, and Lighthouse accessibility audits alongside manual validation checklists for keyboard navigation, screen reader compatibility, and color contrast.

Prerequisites

• Accessibility testing library installed (axe-core, @axe-core/playwright, Pa11y, or Lighthouse CI)
• Browser automation tool (Playwright or Puppeteer) for rendering pages
• Application running and accessible at a test URL
• Target WCAG conformance level defined (A, AA, or AAA -- AA is standard)
• Color contrast analyzer (built into axe-core or standalone tool)

Instructions

1. Configure the accessibility scanner with the target WCAG level:
   • Set axe-core rules to WCAG 2.1 AA (or 2.2 AA for latest standard).
   • Include rules for ARIA attributes, color contrast, form labels, and heading structure.
   • Define pages and components to scan (homepage, forms, modals, navigation).