VGAR Interaction Requirements
Requirements
Interaction
- Accessible Forms (INT-001)
- Error Messaging (INT-002)
- System Messages (INT-003)
- Modal Windows (INT-004)
- Onchange / Onfocus (INT-005)
- Buttons and Links (INT-006)
- Control Moving Content (INT-007)
- No Blinking/Flashing (INT-008)
- Give Users Time (INT-009)
- Custom Controls (INT-010)
- Diverse User Needs and Preferences (INT-011)
No Blinking/Moving (INT-WEB-008)
Never use blinking or flashing content
Content that blinks or flashes automatically should never be used because for users with photosensitive seizure disorders it can induce seizures.
Requirements
No Blinking or Flashing (INT-WEB-008-01)
Content that blinks or flashes MUST never be used.
Test Procedures
Visual Inspection (INT-WEB-008-01-T)
Confirm that each page contains no content that blinks or flashes.
Related Content
WCAG Success Criteria
W3C Techniques
Common Failures
- F47: Failure of Success Criterion 2.2.2 due to using the blink element
- F4: Failure of Success Criterion 2.2.2 due to using text-decoration:blink without a mechanism to stop it in less than five seconds
- F50: Failure of Success Criterion 2.2.2 due to a script that causes a blink effect without a mechanism to stop the blinking at 5 seconds or less
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