All WCAG criteria
WCAG 2.1·Operable·2.3 Seizures and Physical Reactions

2.3.1 Three Flashes or Below Threshold

Level A

Nothing on the page may flash more than 3 times per second.

Why it matters

Photosensitive epileptics can have seizures triggered by rapid flashes.

How OnlyEnable handles this

Automatically remediated. OnlyEnable's "Pause Animations" profile catches most flashing patterns by halting CSS animation.

Related criteria in 2.3 Seizures and Physical Reactions

2.3.2 · Level AAA
Three Flashes
2.3.3 · Level AAA
Animation from Interactions