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peripherad
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vendor
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sabberworm
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php-css-parser
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src
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Property
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KeyframeSelector.php
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<?php namespace Sabberworm\CSS\Property; class KeyframeSelector extends Selector { /** * regexp for specificity calculations * * @var string * * @internal */ const SELECTOR_VALIDATION_RX = '/ ^( (?: [a-zA-Z0-9\x{00A0}-\x{FFFF}_^$|*="\'~\[\]()\-\s\.:#+>]* # any sequence of valid unescaped characters (?:\\\\.)? # a single escaped character (?:([\'"]).*?(?<!\\\\)\2)? # a quoted text like [id="example"] )* )| (\d+%) # keyframe animation progress percentage (e.g. 50%) $ /ux'; }