Animated content that continually moves, blinks, scrolls or updates automatically can be distracting to users. It can pose a barrier for people who have trouble reading quickly or anyone who has trouble tracking moving objects. In addition, any visual content that flashes more than three times in a second could possibly trigger a seizure.
How to Fix
- Provide a keyboard accessible mechanism for users to pause, stop or hide animated content.
- Ensure that after content has been paused or stopped, it can be restarted again from the point where it was stopped.
- Ensure that the mechanism can be easily perceived.
What to Fix
Moving, Blinking, and Scrolling Content
Moving, blinking and scrolling content is any visible content that conveys a sense of motion. It starts automatically, lasts more than five seconds, and is presented in parallel with other content. Examples include: Slideshows, animation, online games, and any content which automatically scrolls.
Auto-updating information is any content that updates or disappears based on a preset time interval. It starts automatically and is presented in parallel with other content. Examples include: audio, weather, news, stock price updates, and automatic presentations or messages.
The only exception is if the moving, blinking, scrolling, or auto-updating content is part of an activity where it is essential, and if removed, would fundamentally change the information or functionality of the content; and the information and functionality cannot be achieved in another way that would conform.
Things to Avoid
- Remove any web content that flashes more than three times in any one second period.
- <blink>Do not use the blink element.</blink>