[Webkit-unassigned] [Bug 141023] New: WebKit incorrectly treats unitless "0" in -webkit-animation value as "animation-delay", instead of "animation-iteration-count"

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Jan 28 19:17:14 PST 2015


            Bug ID: 141023
           Summary: WebKit incorrectly treats unitless "0" in
                    -webkit-animation value as "animation-delay", instead
                    of "animation-iteration-count"
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dholbert at mozilla.com
                CC: dino at apple.com

Created attachment 245599
  --> https://bugs.webkit.org/attachment.cgi?id=245599&action=review
testcase 1

 1. Load attached testcase.

 Lime background on div.

 Red background on div.

Firefox 35 gives me EXPECTED RESULTS.
These webkit-based browsers on Ubuntu 14.10 give me ACTUAL RESULTS:
 - epiphany-browser 3.10.3, using libwebkit2gtk-3.0-25
 - Midori 0.4.3, not sure what webkit version

The testcase has:
  -webkit-animation: fadeIn 1s ease both 0;
  animation:         fadeIn 1s ease both 0;

It seems that webkit is parsing the final "0" there as a valid <time> and hence using it as an "animation-delay" value. However, it's not a valid <time> -- CSS <time> values require units. So it should instead be interpreted as an "animation-iteration-count" value, and be interpreted to mean that the animation shouldn't play (or should freeze at its first frame).

See https://code.google.com/p/chromium/issues/detail?id=453182 for corresponding blink bug, with more discussion of the spec & how <time> requires units. (particularly comments number 6 and 7 there.)

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