Marcelo Paiva

All criteriaPresent as slides

A man in sunglasses and a jacket holds papers above his head in a stadium under clouds.Meant to show: A teenage boy in dark glasses and a baseball jacket

Success criterion 2.3.2

Three Flashes

Web pages do not contain anything that flashes more than three times in any one-second period or the flash is below the general flash and red flash thresholds.

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

In a user’s words

“Seriously, I'm here for information, not a light show!”

Who this helps: Photosensitive Epilepsy

What each role can do

Product manager
Double-check to ensure no flashing elements are in the content or design.
Designer
Opt for user interface design that excludes any flashing elements whatsoever.
Developer
Code to strictly limit any flashing elements and confirm they meet AAA standards.
Tester
Perform rigorous tests to completely rule out any elements that flash more than three times in a one-second period.

Once it is fixed

“Kudos for keeping it chill and flash-free. No sunglasses needed!”

The quotes are written to illustrate the criterion. They are not testimonials from real people. For the official wording, find 2.3.2 in the W3C quick reference for WCAG 2.2 (opens in a new tab).

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