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Re: [css21][css-sizing][web compat] max-width and intrinsic sizes in a table scenario

From: Florian Rivoal <florian@rivoal.net>
Date: Thu, 12 Nov 2015 18:16:19 +0900
Cc: www-style@w3.org
Message-Id: <263BD14B-7EF0-4EB6-8EFC-F70D8DF921D3@rivoal.net>
To: Karl Dubost <kdubost@mozilla.com>
I don't have an answer to the question, but the way it was tagged might have caused people who do to miss it, so retagging
with [css21] and [css-sizing].

 - Florian
> On 27 Oct 2015, at 09:44, Karl Dubost <kdubost@mozilla.com> wrote:
> 
> Hi,
> 
> Gecko (Firefox) has a Webcompat issue related to the use of `max-width` inside `table`. I put an example on Codepen [1].
> 
> For Webcompat reasons with Blink and WebKit, we will probably need to modify Gecko code (see Bugzilla [2]). In the see Also section of this bug, you will find some of the reported Web Compat issues. 
> 
> What I would like to know is if the CSS specification needs to be changed to reflect the reality.
> 
> The CSS specification for `max-width` [3] currently says:
> 
>    <percentage>
>    Specifies a percentage for determining the used value. 
>    The percentage is calculated with respect to the width 
>    of the generated box's containing block. If the containing 
>    block's width is negative, the used value is zero. If the 
>    containing block's width depends on this element's width, 
>    then the resulting layout is undefined in CSS 2.2.
> 
> and…
> 
>    In CSS 2.2, the effect of 'min-width' and 'max-width' on 
>    tables, inline tables, table cells, table columns, and 
>    column groups is undefined.
> 
> 
> Currently Blink and Safari are reducing the image so it fits the viewport. 
> You can see this in recent Web Compat bugs
> https://webcompat.com/issues/1838
> https://webcompat.com/issues/1837
> 
> I summarized the issue in the webcompat space [4]. 
> 
> 
> [1]: http://codepen.io/anon/pen/rOdpdW
> [2]: https://bugzilla.mozilla.org/show_bug.cgi?id=823483
> [3]: https://drafts.csswg.org/css2/visudet.html#propdef-max-width
> [4]: https://github.com/whatwg/compat/issues/12
> 
> -- 
> Karl Dubost, Mozilla
> http://www.la-grange.net/karl/moz
> 
> 
Received on Thursday, 12 November 2015 09:16:51 UTC

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