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Re: [css3-mediaqueries] (min-resolution: 0dpi) is false in several browsers.

From: L. David Baron <dbaron@dbaron.org>
Date: Sun, 21 Oct 2012 12:12:03 -0700
To: "Tab Atkins Jr." <jackalmage@gmail.com>
Cc: Boris Zbarsky <bzbarsky@mit.edu>, www-style@w3.org
Message-ID: <20121021191203.GA24971@crum.dbaron.org>
On Sunday 2012-10-21 12:00 -0700, Tab Atkins Jr. wrote:
> On Sun, Oct 21, 2012 at 8:22 AM, Boris Zbarsky <bzbarsky@mit.edu> wrote:
> > On 10/21/12 7:32 AM, Simon Sapin wrote:
> >> Apparently Firefox, Opera, and IE10 all agree that the media query
> >> (min-resolution: 0dpi) is false, but (min-resolution: 0.1dpi) is true:
> >
> > http://dev.w3.org/csswg/css3-mediaqueries/#values says:
> >
> >   The <resolution> value is a positive <number> immediately followed
> >   by a unit identifier (‘dpi’ or ‘dpcm’).
> >
> > So "0dpi" is not a valid value for <resolution>.
> 
> That sounds silly.  No other dimension has an intrinsic "non-zero"
> requirement, and there's no reason for <resolution> in particular to
> be different.

It might well be useful to not have to worry about the reciprocal
being infinite (considering that, under some ways of thinking about
what DPI is, it's already a reciprocal).

-David

-- 
𝄞   L. David Baron                         http://dbaron.org/   𝄂
𝄢   Mozilla                           http://www.mozilla.org/   𝄂
Received on Sunday, 21 October 2012 19:12:28 GMT

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