SC-2.3.1: Flashing promotional banner
Corpus WCAG 2.2Applies to WCAG 2.0, 2.1, 2.2Level AAutomatable: partial
Summary: A banner flashes more than three times per second.
Why it fails: Photosensitive users may experience seizures or physical reactions because the animation exceeds safe flash thresholds.
Failure technique
Synthetic specimen — no W3C failure technique.
Understanding
Quickref
Intentional failure — audit this region
SC-2.3.1
Large flashing area may exceed three flashes per second.
<div class="sc231-flash"></div>
<p>Large flashing area may exceed three flashes per second.</p>Expected audit result
- 2.3.1: fail — Specimen demonstrates failure of 2.3.1.
Manual check: Measure flash frequency and confirm it exceeds three flashes per second.