W3C home > Mailing lists > Public > www-style@w3.org > May 2012

Re: Proposal: position:fixed elements should form new stacking contexts

From: Robert O'Callahan <robert@ocallahan.org>
Date: Thu, 17 May 2012 18:50:38 +1200
Message-ID: <CAOp6jLYRabuihAj3t6yFKh0zkPHVzyywharte55v_Qzj-96cMQ@mail.gmail.com>
To: James Robinson <jamesr@google.com>
Cc: www-style list <www-style@w3.org>
On Thu, May 17, 2012 at 6:34 PM, Robert O'Callahan <robert@ocallahan.org>wrote:

> On mobile, asynchronous scrolling of pages with fixed-pos elements is not
> fully done yet, which may be why you see jank there currently. We do have
> the limitation that asynchronous scrolling doesn't work for scrolled
> elements that have been split into multiple layers. As you note, that is
> pretty rare.
>

I guess you could say that changing the spec would make it easier for us to
do asynchronous scrolling of pages that currently interleave fixed-pos
content with scrolling content. But that would only help us on pages we'd
have broken the rendering of, so I don't find it a compelling argument :-).

I don't particularly object to changing the spec assuming you have data
showing that on mobile *and desktop* this doesn't break sites. Especially
if you're willing to take the lead on the compatibility break on desktop!
(I may however claim an IOU for "small but slightly-compat-breaking spec
change to simplify our engine" :-).)

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 Thursday, 17 May 2012 06:51:07 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 17:20:54 GMT