[Webkit-unassigned] [Bug 49059] New: Unable to remove 'important' priority of a CSS property

Fri Nov 5 01:29:19 PDT 2010

https://bugs.webkit.org/show_bug.cgi?id=49059

           Summary: Unable to remove 'important' priority of a CSS
                    property
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: phnixwxz at gmail.com

Created an attachment (id=73043)
 --> (https://bugs.webkit.org/attachment.cgi?id=73043&action=review)
test case

<!DOCTYPE html>
<html>
<head></head>
<body>
<div id='d1' style='background: yellow !important'>d1 should be red</div>
<div id='d2' style='background: yellow !important'>d2 should be red</div>
<div id='d3' style='background: yellow !important'>d3 should be red</div>
<script>
// 1. Unable to change value of an important property by setting JS property.
var d1 = document.getElementById('d1');
d1.style.background = 'red';

// 2. Unable to change value of an important property with setProperty().
var d2 = document.getElementById('d2');
d2.style.setProperty('background', 'red');

// 3. The 'important' priority still remains even if the property is removed with removeProperty().
var d3 = document.getElementById('d3');
d3.style.removeProperty('background');
d3.style.setProperty('background', 'red', '');

// The following will succeed:
// d3.style.setProperty('background', 'red', 'important');
// or
// d3.style.background = 'red !important'; 

</script>
</body>
</html>

Firefox also behaves like WebKit. However, the behavior seems unreasonable and not to comply with the draft CSSOM standard. http://dev.w3.org/csswg/cssom/#the-cssstyledeclaration-interface

Anyway, I agree to delay fixing this issue until the CSSOM standard is frozen.

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