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WCAG 2.1 Section 5.2.4: Only Accessibility-Supported Ways of Using Technologies

Estimated read time: 4–5 minutes

What Does "Accessibility-Supported Ways" Mean?

WCAG 5.2.4 sets one rule. You can only rely on web technologies that work in both browsers and assistive technologies. If a feature doesn't work with screen readers or keyboards, it cannot count toward WCAG conformance.

In short: use tech that works for all. If it fails AT tests, add a backup. Test early and test often.

Key points:

  • Use web technologies in ways that work with AT and mainstream browsers.
  • If a feature is not accessibility supported, provide a supported alternative.
  • "Accessibility supported" means the feature is tested and works with AT in your users' language.

Why Is This Important?
  • Real-world access: Users with disabilities rely on AT. If your site uses features that don't work with AT, those users are excluded.
  • Legal compliance: Conformance to WCAG requires accessibility-supported use of technologies.
  • Future-proofing: Ensures your content works as technologies evolve.

Examples
  • Accessible: Using standard HTML form elements, which are supported by browsers and screen readers.
  • Not accessible: A custom widget that screen readers cannot read or operate, unless you add an accessible option.
  • Alternative provided: Use an accessible video player if the main one is not. Supply a supported option.

How to Meet This Requirement
  • Use web technologies (HTML, CSS, JavaScript, etc.) in ways that are known to be accessibility supported.
  • Test your implementation with assistive technologies and browsers used by your audience.
  • Provide accessible alternatives for any features that are not accessibility supported.
  • Consult resources like W3C’s Accessibility Support documentation .

Summary

WCAG conformance requires accessibility-supported technology. Any unsupported feature needs a supported alternative. This protects access for all users, including those with disabilities.

References & Further Reading

Accessibility means using technologies in ways everyone can access.