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Re: User Agents Do Not Implement Absolute Length Units, Places Responsive Design in Jeopardy

From: Robert O'Callahan <robert@ocallahan.org>
Date: Fri, 28 Oct 2011 10:17:33 +1300
Message-ID: <CAOp6jLZdr+ZNMLwUZ2enRF0Qrs7J1C6Y2x9B0JMujAbm14z6pQ@mail.gmail.com>
To: Felix Miata <mrmazda@earthlink.net>
Cc: www-style@w3.org
On Fri, Oct 28, 2011 at 2:34 AM, Felix Miata <mrmazda@earthlink.net> wrote:

> On 2011/10/27 22:27 (GMT+1300) Robert O'Callahan composed:
>
>  Approximate angle subtended at the eye is what CSS "px" is for.
>>
>
> And, it's _not_ suitable for sizing text. It doesn't correlate to the
> visitor's preferred/default size, so randomly, typically negatively, impacts
> legibility, accessibility and usability.
>

Totally agree. Use ems or % if you want default font size prefs to be taken
into account.

(Although note that many UAs, including Firefox, support minimum-font-size
preferences that can override px font-sizes.)

Rob
-- 
"If we claim to be without sin, we deceive ourselves and the truth is not in
us. If we confess our sins, he is faithful and just and will forgive us our
sins and purify us from all unrighteousness. If we claim we have not sinned,
we make him out to be a liar and his word is not in us." [1 John 1:8-10]
Received on Thursday, 27 October 2011 21:18:01 GMT

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