|A page must not include content that flashes more than three times in one second, unless below general flash and red flash thresholds.
- People who have photosensitive seizure disorders can have a seizure triggered by content that flashes at certain frequencies for more than a few flashes.
- People are even more sensitive to red flashing than to other colors.
- NOTE: This flashing requirements was adapted from the broadcasting industry standards (e.g. content is viewed from a closer distance and using a larger angle of vision).
HTML4 Legacy Techniques
HTML5 and ARIA Techniques
|WCAG Success Criteria
2.3.1 Three Flashes or Below Threshold (Level A, Primary Success Criterion)
Canvas, SVG and image animations; flashing text content; video; and embedded applications
- There is no remedication technique, the content must be removed or disabled from flashing.