In general, flashing should be avoided because it can be distracting for many users. The larger concern though with flashing is for our users with photosensitive seizure disorders. These users can have a seizure if we have elements on our page that flash at certain frequencies.

WCAG 2.3.1: Three Flashes or Below Threshold Opens in a new window


  • Nothing flashes more than 3 times in any one second period