What the standard says
For moving, blinking, scrolling, or auto-updating information, all of the following are true:
Why it matters
Motion pulls attention away for people with attention or vestibular conditions, and moving text is unreadable for some low-vision users.
What a failure looks like
- failsAn auto-rotating hero carousel with no pause.
- failsA live ticker that never stops.
How to fix it
- doAdd a visible pause / play control that is reachable by keyboard.
- doRespect `prefers-reduced-motion` — it is a signal the user already gave you.
How A11ySignal checks it
2 automated checks run against this criterion on every scan.