[Webkit-unassigned] [Bug 272440] New: [serialization] CSS animation="none" property should stay as is

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=272440

            Bug ID: 272440
           Summary: [serialization] CSS animation="none" property should
                    stay as is
           Product: WebKit
           Version: Other
          Hardware: Unspecified
               URL: http://wpt.live/css/css-animations/parsing/animation-v
                    alid.html
                OS: Unspecified
            Status: NEW
          Keywords: BrowserCompat, WPTImpact
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: karlcow at apple.com
                CC: dino at apple.com, graouts at apple.com,
                    webkit-bug-importer at group.apple.com

Enter in STP 191
  data:text/html,<div%20style="animation:none"></div>
In the Web Inspector console, type
  document.querySelector('div').style.getPropertyValue('animation')

It returns 0s instead of none.

This fails the test 
http://wpt.live/css/css-animations/parsing/animation-valid.html
http://wpt.fyi/css/css-animations/parsing/animation-valid.html

Firefox and Chrome return the correct value.

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