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Re: [css3-values] Physical length units

From: Robert O'Callahan <robert@ocallahan.org>
Date: Mon, 20 Feb 2012 12:08:39 +1300
Message-ID: <CAOp6jLZjZ9XWumjXnsrHzi+EG51TmTx40DuimduUgGj=Rq3_zg@mail.gmail.com>
To: Lea Verou <leaverou@gmail.com>
Cc: Charles Pritchard <chuck@jumis.com>, Felix Miata <mrmazda@earthlink.net>, www-style@w3.org
On Mon, Feb 20, 2012 at 10:58 AM, Lea Verou <leaverou@gmail.com> wrote:

> I wasn't implying that truemm will replace ems. But when most authors use
> ems, they still define the root font-size in pixels, and then use ems to
> increase or decrease it as necessary. That root font-size would be much
> better off with truemm.


No, that's a surefire way to write pages that are unusable across different
kinds of devices.

The only use-cases for truemm are when you need content matching the size
of some real-world object, e.g. a ruler, or a life-size image, or a human
fingertip. That's it.

Ask yourself, "do I really want this content to be the same physical size
on a phone and a wall projector?" If the answer is yes, use truemm,
otherwise don't.

Rob
-- 
“You have heard that it was said, ‘Love your neighbor and hate your enemy.’
But I tell you, love your enemies and pray for those who persecute you,
that you may be children of your Father in heaven. ... If you love those
who love you, what reward will you get? Are not even the tax collectors
doing that? And if you greet only your own people, what are you doing more
than others?" [Matthew 5:43-47]
Received on Sunday, 19 February 2012 23:09:06 GMT

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