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keyframe-block-no-duplicate-selectors

Disallow duplicate selectors within keyframe blocks.

@keyframes foo { 0% {} 0% {} }
/**                    ↑
 *                     This duplicate selector */

This rule is case-insensitive.

The message secondary option can accept the arguments of this rule.

Options​

true​

The following patterns are considered problems:

@keyframes foo { 0% {} 0% {} }
@keyframes foo { from {} from {} }
@keyframes foo { from {} FROM {} }

The following patterns are not considered problems:

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