- Success Criterion 2.3.1
- Conformance level A
Ad or User-Generated Content Never Screened for Flashing
2.3.1 — Three Flashes or Below Threshold
Scenario
Setting
A grocery delivery app's shopping cart
What’s wrong
Ad creatives/user-generated content embedded without flash screening.
Example
Here's what happens on a grocery delivery app's shopping cart: ad creatives/user-generated content embedded without flash screening.
Why it matters
People with photosensitive epilepsy and others sensitive to rapid flashing. Here, on a grocery delivery app's shopping cart, the result is they are interrupted before they can finish reading.
How to test
Review third-party ad creatives or user-generated content embedded on the page: unscreened content with flashing above threshold fails.
How to fix
Nothing may flash more than 3 times per second above the general or red-flash thresholds.
Outcome
After the fix, the same visitor to a grocery delivery app's shopping cart can now keep up without being rushed or interrupted.
Who is affected
People with photosensitive epilepsy and others sensitive to rapid flashing.
Learn more
- Understanding Understanding document (opens in a new tab)
Related scenarios
- Content Flashing Faster Than 3 Times per Second
- Strobe Intro or Glitch Effect Above the Flash Threshold
- Unedited Video With Strobe or Lightning Effects
- Rapid Full-Screen Color Flash on Load or Error
- Rapid Hover Effect That Flashes When a Key Autorepeats
- Loading Spinner Built as a Rapid Full-Screen Flicker