2.3.2 Three Flashes Level AAA

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

[View on W3C.org]

Testing & Remediation

How to test: Navigate to any page that contains flashing content. While the content flashes, say “A and B and C”. This generally equals 3 vocalizations per second. If the content flashes faster that you saying “A and B and C”, this success criterion will fail. You can also use a tool to help test this, such as the PEAT (Photosensitive Epilepsy Analysis Tool). It is Windows only but can be installed on a dual-boot Mac. How to remediate: Remove any content that flashes more than 3 times in any 1 second period.

Questions and Answers

Are animated gifs okay to have?

If I have a gif on a site that loops continuously. Is that okay or does it violated the 'can't have repeating flashing stuff' rule?