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Re: [css-flexbox] [css-sizing] Interaction of min-height and box-sizing: border-box

From: fantasai <fantasai.lists@inkedblade.net>
Date: Thu, 23 Jun 2016 18:53:27 -0400
To: www-style@w3.org
Message-ID: <576C6867.1030808@inkedblade.net>
On 06/23/2016 05:40 PM, Christian Biesinger wrote:
> Hi there!
>
> With a testcase like this:
>
> <div style="height: 20px; min-height: min-content; box-sizing:
> border-box; padding-top: 50px;">
>    <div style="height: 50px; width: 50px;"></div>
> </div>
>
> What should the final size of the div be? Clearly, min-content here is
> a 50px content-box or 80px border-box. But sizes in min-height get
> adjusted by box-sizing. Do we insert the 50px content-box into
> min-height, then adjust by box-sizing, and get an effective min-height
> or 30px? Or not?
>
> And (for the css-flexbox part of the question), does it make a
> difference when this happens in the context of min-height: auto?
>
> xref https://bugs.chromium.org/p/chromium/issues/detail?id=549863

box-sizing only affects the interpretation of <length> and <percentage>
values: border-box changes their meaning to subtract out the border and
padding widths before applying those values to the content-box.

It therefore has no effect on any of the keyword values of 'width' and
'height'.

~fantasai
Received on Thursday, 23 June 2016 22:54:03 UTC

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