WCAG/2-operable/2.2.4-interruptions.md

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2.2.4 Interruptions

• Level: AAA
• Guideline: 2.2 Enough Time
• Principle: 2 Operable

What it is

Interruptions can be postponed or suppressed by the user, except interruptions involving an emergency.

How to test

• Check: Interruptions can be postponed or suppressed by the user, except interruptions involving an emergency.
• Use the sufficient techniques below as acceptable methods when applicable.
• Confirm none of the common failures apply.

Sufficient techniques (W3C)

• G75: Providing a mechanism to postpone any updating of content
• G76: Providing a mechanism to request an update of the content instead of updating automatically
• SCR14: Using scripts to make nonessential alerts optional

Common failures (W3C)

• F40: Failure due to using meta redirect with a time limit
• F41: Failure of Success Criterion 2.2.1, 2.2.4, and 3.2.5 due to using meta refresh to reload the page

Resources

• WCAG 2.2 SC: https://www.w3.org/TR/WCAG22/#interruptions
• Understanding: https://www.w3.org/WAI/WCAG22/Understanding/interruptions.html
• Quick reference: https://www.w3.org/WAI/WCAG22/quickref/?versions=2.2#interruptions

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