Because the @-Webkit-Keyframes Rule and the :Valid Pseudo-Class Are Not

question 13

Short Answer

Because the @-webkit-keyframes rule and the :valid pseudo-class are not part of the CSS specification, they cause __________ errors.

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Definitions:

Pinna

The external part of the ear that collects sound waves and directs them into the ear canal.

Traction

The application of a pulling force to parts of the body to align and immobilize fractures or to relieve pressure on skeletal or soft tissues.

Aspirin

A medication used to reduce pain, fever, inflammation, and, in low doses, to prevent blood clots.

Startle

A quick, automatic response to a sudden unexpected stimulus, often characterized by jerking bodily motions.