Guideline 2.3

Seizures and Physical Reactions

Apps should be safe for everyone to use. Some people can have a seizure because of flashing images. People are often only aware of this condition after having their first seizure.

Success Criteria

• 

  Three Flashes or Below Threshold

  Ensure no more than three flashes per second are shown anywhere in the app.

  Success Criterion 2.3.1 - Three Flashes or Below Threshold
• 

  Three Flashes

  Apps should not contain anything that flashes more than three times in any one second period.

  Success Criterion 2.3.2 - Three Flashes
• 

  Animation from Interactions

  Motion animation triggered by interaction can be disabled, unless the animation is essential to the functionality or the information being conveyed.

  Success Criterion 2.3.3 - Animation from Interactions

Resources

• WCAG 2.2 - Guideline 2.3 - Seizures and Physical Reactions