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spec css3 background

Keith Cirkel edited this page Feb 13, 2026 · 1 revision

CSS Backgrounds and Borders Level 3

Issues are currently tracked at http://www.w3.org/Style/CSS/Tracker/products/11

Old Issues

The following are known problems in the 16 February 2005 CSS Backgrounds and Borders Level 3 Working Draft.

Issue 1

Dup of issue 6

Issue 2

URL: http://lists.w3.org/Archives/Public/www-style/2006Jul/0017.html Summary: Need border-image clarifications Proposal: http://lists.w3.org/Archives/Public/www-style/2007Jun/0096.html Resolution: Proposal accepted Status: Closed.

Issue 3

URL: http://lists.w3.org/Archives/Public/www-style/2007Jun/0073.html Summary: Middle image doesn't scale to match border images Resolution: Proposal accepted with s/top/left s/width/height and s/bottom/right in the second modification Status: Closed.

Issue 4

URL: http://lists.w3.org/Archives/Public/www-style/2007Jun/0208.html Summary: Shorthand for border-radius unnecessarily restrictive. Resolution: the border-radius shorthand shall take up to four values that each set both radii for the corresponding corner as in Mozilla's implementation. The first value applies to the top-left corner, and rest are assigned clockwise. Missing values are filled in as for margin et al. Adopt Anne's proposal for extended syntax that allows setting elliptical curves. Status: Closed.

Issue 5

URL: http://lists.w3.org/Archives/Public/www-style/2006Jul/0017.html http://lists.w3.org/Archives/Public/www-style/2007Aug/0217.html Summary: No defined behavior for overlapping radii. Proposal: Reduce both radii of affected corners in proportion, thereby preserving the shape of the curves. Still need proposal on how various corners interact. Resolution: Result should not create pointy intersections. Details unresolved. Status: Needs precise mathematical proposal.

Issue 6

URL: http://lists.w3.org/Archives/Public/www-style/2007Sep/0092.html Summary: Define point of color (and style?) transitions. Proposal: The center of color and style transitions are at an angle that is proportional to the ratio of the border widths. E.g. if the two widths are equal, the angle is 45deg, and if one is twice the width of the other the angle is 30deg. The line demarcating this transition is drawn between the point at that angle on the outer curve and the point at that angel on the inner curve. Resolution: Proposal accepted Status: Closed.

Issue 7

URL: http://lists.w3.org/Archives/Public/www-style/2007Sep/0092.html Summary: Define inner border curve. Proposal: The inner border radius is the outer border radius minus the border thickness. In the case where this results in a negative value, the inner radius is zero. (In such cases its center might not coincide with that of the outer border curve.) Resolution: Proposal accepted. Status: Closed.

Issue 8

URL: http://lists.w3.org/Archives/Public/www-style/2006May/0017.html http://lists.w3.org/Archives/Public/www-style/2006May/0121.html Summary: Refine background shorthand syntax Proposal: http://lists.w3.org/Archives/Public/www-style/2006May/0018.html Resolution: Use the / before , require to occur before . Status: Closed.

Issue 9

URL: http://lists.w3.org/Archives/Public/www-style/2006May/0120.html Summary: Combine 'background-clip' and 'background-origin'? Proposal: http://lists.w3.org/Archives/Public/www-style/2006May/0120.html Resolution: No change. Status: Closed.

Issue 10

URL: http://lists.w3.org/Archives/Public/www-style/2006May/0037.html Summary: Should negative background-size flip the image? Resolved: No change. Status: Closed.

Issue 11

URL: http://lists.w3.org/Archives/Public/www-style/2007Nov/0091.html Summary: Background-position should calculate after background-size is applied Resolution: Already fixed. :) Status: Closed.

Issue 12

URL: http://lists.w3.org/Archives/Public/www-style/2007Nov/0105.html Summary: Background-position should allow positioning from corners other than top left Status: Closed.

Issue 13

URL: http://lists.w3.org/Archives/Public/www-style/2007Dec/0011.html Summary: Background-position should have a figure for percentage positioning Resolution: Accepted. Status: Closed.

Issue 14

URL: http://lists.w3.org/Archives/Public/www-style/2008Jan/0356.html Summary: 'background-size' needs a better name Proposal: 'background-fit' Resolution: No change. Status: Closed.

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