WCAG/2-operable/2.3.2-three-flashes.md

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2.3.2 Three Flashes

• Level: AAA
• Guideline: 2.3 Seizures and Physical Reactions
• Principle: 2 Operable

What it is

Web pages do not contain anything that flashes more than three times in any one second period.

How to test

• Check: Web pages do not contain anything that flashes more than three times in any one second period.
• Use the sufficient techniques below as acceptable methods when applicable.

Sufficient techniques (W3C)

• G19: Ensuring that no component of the content flashes more than three times in any 1-second period

Resources

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

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