The “Blinking Content Check” evaluates whether there is any blinking visual effects, caused by the deprecated <blink> HTML tag or the CSS code text-decoration: blink.
Example outcome
I found 1 <blink> value in the CSS which causes the blinking of parts of the content.
Impact
Cognitive Disabilities: Blinking distracts from comprehension, making the experience mentally taxing or confusing for people with cognitive disabilities.
ADHD/Attention-Related Disorders: Blinking draws visual focus away from primary content. Persistent animation can make it difficult to concentrate or read surrounding content.
Autism/Sensory Processig Disorders: Rapid or unexpected visual changes can be overwhelming or cause sensory discomfort. It can trigger anxiety or a strong adverse reaction.
Seizure Disorders: Blinking or flashing content, even at low frequencies, can pose a risk to users with seizure disorders if it crosses thresholds. Even at sub-threshold frequencies, blinking can cause discomfort or anxiety.
Fixes
To address blinking content:
Locate any <blink> tags.
Remove them.
Locate any text-decoration: blink in CSS.
Remove or replace the code.
If animation is necessary, use subtle transitions and provide a mechanism to pause or stop the animation.