Description

Specify keyword or percentage notation for keyframe selectors.

@keyframes foo { from {} to {} }
/**              ↑       ↑
 *               These notations */

The keyword from is equivalent to the value 0%. The keyword to is equivalent to the value 100%.

Examples

string: "keyword"|"percentage"|"percentage-unless-within-keyword-only-block"

Keyframe selectors must always use the keyword notation.

The following pattern is considered a problem:

@keyframes foo { 0% {} 100% {} }

The following pattern is not considered a problem:

@keyframes foo { from {} to {} }

Keyframe selectors must always use the percentage notation.

The following pattern is considered a problem:

@keyframes foo { from {} to {} }

The following pattern is not considered a problem:

@keyframes foo { 0% {} 100% {} }

Keyframe selectors must use the percentage notation unless within a keyword-only block.

The following pattern is considered a problem:

@keyframes foo { from {} 100% {} }

The following patterns are not considered problems:

@keyframes foo { 0% {} 100% {} }

@keyframes foo { from {} to {} }