- From: Boris Zbarsky <bzbarsky@MIT.EDU>
- Date: Fri, 28 Feb 2003 13:17:54 -0600
- To: Tom Gilder <tom@tom.me.uk>
- CC: www-style@w3.org
Tom Gilder wrote: > If I have an element set to a width wider than the viewport and > margin-left/right set to auto, how should the element display? Unfortunately, the CSS specification has some wiggle-room here that makes all of the renderings involved "valid". See http://www.w3.org/TR/CSS21/visudet.html#min-max-widths -- the part you want is the paragraph right after the numbered list that starts "The user agent may define a non-negative minimum value for the 'min-width' property, which may vary from element to element and even depend on other properties." (Translation: "As long as the actual width is at least the specified width, the rendering is compliant no matter what"). So if in this case IE and Opera make up a min-width for the containing block of your element they can indeed satisfy the width constraint equation with 0 margins and be technically compliant. Mozilla basically ignores that paragraph and treats min-width as 0 if min-width is not specified. So that rendering is also compliant. Try putting a border on the containing block of your element to see whether IE and Opera are indeed just increasing the CB width; I bet they are. (Note that IE will even do this if you set a specified width on the CB and will be completely compliant as it does it.)
Received on Friday, 28 February 2003 14:18:03 UTC