[Webkit-unassigned] [Bug 73941] New: Handling of !important in inline style sets is broken

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73941

           Summary: Handling of !important in inline style sets is broken
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bzbarsky at mit.edu


Consider the attached testcase, which does:

      document.getElementById("x").style.color = "red !important";

Per http://dev.w3.org/csswg/cssom/#the-cssstyledeclaration-interface the behavior should be:

  Similarly for the table below, setting the IDL attribute in the first column must invoke
  setProperty() with as first argument the CSS property given in the second column on the same row,
  as second argument the given value, and no third argument.

and the definition of setProperty says:

  If parsing the value returns null terminate this algorithm.
     Note: value can not include "!important".

WebKit gets the setProperty part right, but not the idl attribute set part.  Gecko and IE9 get the idl attribute part right.

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