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Re: [css3-flexbox] min-width & min-height "auto" value -- applies to both axes, or just main axis?

From: Daniel Holbert <dholbert@mozilla.com>
Date: Tue, 12 Jun 2012 12:12:50 -0700
Message-ID: <4FD794B2.9070409@mozilla.com>
To: Alex Mogilevsky <alexmog@microsoft.com>
CC: "Tab Atkins Jr." <jackalmage@gmail.com>, fantasai <fantasai@inkedblade.net>, www-style list <www-style@w3.org>
On 06/11/2012 06:07 PM, Alex Mogilevsky wrote:
>  So right now, the spec is calling for all flexbox items to have *both* their min-
>  width *and* their min-height default to "min-content".
>  I'd thought we only wanted this magic for the main axis's min-size property, not 
>  for both min-size properties. Maybe I misunderstood though?
> We want the magic in both direction

To be clearer / more specific: do we want "min-height:auto" to ever
compute to something nonzero on a flex item in a horizontal flexbox?

I don't think we do.  Now -- in the *main* axis, there's a good reason
for the magic, because without it, common values of the "flex" shorthand
could easily end up shrinking an item below its min-content width.  But
in the cross axis, there aren't any flexbox-specific sizing surprises
like that, IIUC.  So I don't see a good reason for the cross-axis
min-size property to have a magical default there when it computes to 0
everywhere else.

> The actual magic that we want is "minimum size of content when laid out within constraints of cross size of flexbox".

This makes sense to me (for the main-axis min-size property), though
what you're describing is much more nuanced & complex than what the WD
currently says...

Received on Tuesday, 12 June 2012 19:13:24 UTC

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