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Re: [css3-ui] Proposal for an "overlay" value for 'overflow'

From: Walter Dolce <walterdolce@gmail.com>
Date: Fri, 25 Jan 2013 09:57:38 +0100
Message-ID: <CA+QHm2priMdVzEhRex_AsDfQqCpx0dgPxscNXeZaD2w2gO6h3w@mail.gmail.com>
To: Brad Kemper <brad.kemper@gmail.com>
Cc: "Tab Atkins Jr." <jackalmage@gmail.com>, Simon Fraser <smfr@me.com>, www-style list <www-style@w3.org>
I don't think that a CSS rule that allow the content going over an other
one is useful. I think we already have a rule that allow a content to go
over an other one (if we want to), and that's "position:relative|absolute;

I thought, however, a possible scenario where overflow: overlay could be
useful. For example two images one over the other. But even in this case,
for me, position:relative|absolute wins. So that's the reason why I'm
saying that I don't *vote* to standardize it.

Of course, my mind may not be sighted, so please let me imagine or show
real applications of overflow: overlay.

2013/1/25 Brad Kemper <brad.kemper@gmail.com>

> On Jan 24, 2013, at 2:41 PM, Tab Atkins Jr. wrote:
> > On Thu, Jan 24, 2013 at 2:22 PM, Brad Kemper <brad.kemper@gmail.com>
> wrote:
> >> I just tested the jsfiddle in Lion, and the results seem to depend on
> the "General" System Preference for the "Show scroll bars" setting. If it
> is set to "When scrolling", there is no difference between the two property
> values. If it set set to "always", then 'overlay' does indeed overlap and
> obscure the content. (Reload the page after changing the system pref, or
> you get other results).
> >
> > The "When Scrolling" feature makes the scrollbars always be overlays,
> > right?  If so, then it's unsurprising that "auto" and "overlay" act
> > the same.
> Right. What was surprising is that it wasn't really useful for, say,
> emulating the "When Scrolling" mode while in the other mode. The scrollbars
> just always obscured content whether scrolling or not, when in "always"
> mode.
> >
> >> It doesn't seem to useful in Mac Safari. Maybe it does something nicer
> looking on Chrome in Android or something, if it perhaps used more
> transparent scrollbars?
> >
> > It's obviously not pretty if it's overlapping content.  The point of
> > it is to address the problems that Markus brings up in the thread
> > about vw/vh
> Are you sure, or just speculating? Was there more information about it in
> a commit message or something?
> > - in a site with similar pages, some of which trigger
> > scrollbars and some of which don't, the layout of the page "jiggles" a
> > bit between page loads.  Worse is if a single page, updated via JS,
> > sometimes is long enough to trigger a scrollbar and sometimes not.
> > The overlay scrollbar lets you avoid having to show a useless vertical
> > scrollbar when there's nothing to scroll, but keeps your layout from
> > jiggling.  You still have to accommodate the possibility of a
> > scrollbar, by doing something like adding "body { padding-right: 20px;
> > }" or similar, but that's often very easy to incorporate into a
> > design.
> >
> > ~TJ

Walter Dolce,
Programmer, Web Developer

Phone: 348 2810146
Email: walterdolce@gmail.com
Website: www.lifearoundweb.com
Received on Friday, 25 January 2013 09:44:07 UTC

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