All checks / frame-focusable-content

Frames with focusable content must not have tabindex=-1

Ensure <frame> and <iframe> elements with focusable content do not have tabindex=-1

Why this is a legal issue in the EU

The European Accessibility Act requires covered digital services to meet the harmonised standard EN 301 549. Clause 9 of that standard adopts the WCAG 2.1 Level AA success criteria directly, so a failure of SC 2.1.1 is a failure of EN 9.2.1.1 — which is the reference a supervising authority or a complainant will cite, not the WCAG number on its own.

What an automated check can and cannot tell you

The frame-focusable-content check is machine-decidable: where it reports a failure, the failure is real. It cannot confirm the opposite. Passing this check does not mean you satisfy EN 9.2.1.1, because parts of that criterion depend on human judgement about meaning and context.

Related clauses

• EN 9.2.1.1 — KeyboardWCAG 2.1 success criterion 2.1.1

Reference

Full technique documentation for frame-focusable-content →