From: Jean-Christophe Helary <jean.christophe.helary@traduction-libre.org>
To: emacs-devel <emacs-devel@gnu.org>
Subject: Re: html manual +css
Date: Fri, 27 Dec 2019 00:08:12 +0900 [thread overview]
Message-ID: <29E540AC-0DE4-40A5-AAD6-58FE0178B830@traduction-libre.org> (raw)
In-Reply-To: <jwv36d788am.fsf-monnier+emacs@gnu.org>
> On Dec 26, 2019, at 23:45, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>
>> 1) to have mobile browsers recognize media queries related to the display
>> size it is necessary to add a <meta> tag to the <head> that contains
>> a reference to the "viewport" of the display:
>>
>> https://www.reddit.com/r/css/comments/eft71n/iphone_safari_does_not_respond_to_maxwidth_media/
>
> I wonder why the HTML needs this and what it really means.
> [ E.g. the name "device-width" makes it sound like it intends to reflect
> the physical size of the screen, whereas people watch their phone
> screen from a much shorter distance than their desktop screen, so we
> should pay attention to the "apparent size" rather than the physical
> size. ]
The MDN doc on viewport is here:
https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag
The W3C is trying to port that directly to CSS but the spec is only a draft:
https://drafts.csswg.org/css-device-adapt/#the-viewport
My understanding is that as you noticed, pixel numbers on mobile are equivalent or superior to desk/laptops but pixel density is much higher on mobile, so there is a need to tell the browser not to consider how many pixels are required to display a given content but on which viewport is actually is displayed.
https://medium.com/@elad/understanding-the-difference-between-css-resolution-and-device-resolution-28acae23da0b
and
https://www.quirksmode.org/mobile/viewports2.html
I still need to wrap my mind around all that but it will make sense eventually :) I'm going to spend a few days reading all that and practicing...
>> 3) then I put all that online and now the sample that I presented yesterday
>> works perfectly well on a small mobile device, as you wanted.
>
> Portrait mode now looks great, indeed, thanks.
>
> In landscape mode, tho, the browser is wide enough that the top-header
> fits on a single line and hence "sticks around" when you scroll, thus
> eating up a lot of screen real estate (especially since phones nowadays
> have an appalling aspect ratio, very far from the beloved 4:3).
Ooops. Ok, I'm working on that...
Jean-Christophe Helary
-----------------------------------------------
http://mac4translators.blogspot.com @brandelune
next prev parent reply other threads:[~2019-12-26 15:08 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-02 13:49 html manual +css Jean-Christophe Helary
2017-06-02 14:28 ` Paul Eggert
2017-06-02 14:45 ` Jean-Christophe Helary
2017-06-02 14:56 ` Jean-Christophe Helary
2017-06-02 15:14 ` Yuri Khan
2017-06-02 15:22 ` Eli Zaretskii
2017-06-02 15:29 ` Jean-Christophe Helary
2017-06-05 14:44 ` Jean-Christophe Helary
2017-06-06 22:41 ` Richard Stallman
2017-06-06 23:47 ` Jean-Christophe Helary
2017-06-07 14:27 ` Jean-Christophe Helary
2019-12-23 16:54 ` Jean-Christophe Helary
[not found] ` <jwvr20v6jug.fsf-monnier+emacs@gnu.org>
2019-12-24 9:06 ` Jean-Christophe Helary
2019-12-24 14:37 ` Jean-Christophe Helary
2019-12-24 14:43 ` Jean-Christophe Helary
2019-12-25 22:03 ` Stefan Monnier
2019-12-26 0:08 ` Jean-Christophe Helary
2019-12-26 14:09 ` Jean-Christophe Helary
2019-12-26 14:45 ` Stefan Monnier
2019-12-26 15:08 ` Jean-Christophe Helary [this message]
2019-12-26 15:22 ` Jean-Christophe Helary
2019-12-26 15:50 ` Stefan Monnier
2019-12-26 16:27 ` Yuri Khan
2019-12-26 18:17 ` Stefan Monnier
2019-12-26 16:53 ` Jean-Christophe Helary
2019-12-30 11:53 ` Jean-Christophe Helary
2020-01-15 11:20 ` Gavin Smith
2020-01-15 12:12 ` Jean-Christophe Helary
2020-01-15 13:43 ` Patrice Dumas
2020-01-15 13:52 ` Jean-Christophe Helary
2020-01-15 14:18 ` Patrice Dumas
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