Re: Home for viewport-related issues

Adding Simon Pieters more up-to-date email address.


On Wed, Mar 20, 2019 at 7:53 PM David Bokan <bokan@chromium.org> wrote:

> Sorry for the delayed response - this somehow missed my inbox.
>
> Agree that we should specify explicitly what coordinate space each
> relevant API is in. And great to hear VisualViewport is coming to Safari
> :). I don't think anyone is actively working on @viewport any more and the
> prevailing opinion in Chromium is it would hurt loading performance so it
> would be out of scope. There's some useful spec text in device-adaptation
> related to viewport meta though which might be useful to formalize.
>
> +simonp@opera.com, who is the CSSOM View editor, for thoughts. Do you
> agree this makes sense to go into CSSOM View? If so, should we just patch
> it into the latest draft or a level 2? Or do you think it'd make sense to
> iterate on it in a separate repo and merge it in when it's closer to a
> complete spec?
>
> On Tue, Jan 22, 2019 at 7:54 PM Simon Fraser <smfr@me.com> wrote:
>
>>
>> On Jan 22, 2019, at 7:44 AM, David Bokan <bokan@chromium.org> wrote:
>>
>> Hi www-style,
>>
>> I've collected some viewport-related interop research in an explainer I
>> wrote a while back[1]. This doc tracked issues like how we decide what page
>> scale to load a page at, how position: fixed elements and overflow: hidden
>> work in the presence of pinch-zoom, etc.
>>
>> bballo@mozilla.com has been working on squashing some of these interop
>> issues and so far we've been using my GitHub as a place to collect issues
>> and discussion. I think it'd be beneficial to move the discussion into a
>> more official+public place, perhaps a WICG GitHub repo. I was wondering if
>> anyone had thoughts on where this might belong or if there's an existing
>> spec/repo viewport work might fit well into.
>>
>> I think these kind of issues are closely aligned with the
>> device-adaptation spec [2]. There's also the question of the visualViewport
>> API spec [3]. This is currently a WICG draft but I believe others are now
>> implementing it so we could probably start moving it out of "incubation".
>> That's also closely related to these discussions.
>>
>> WDYT?
>>
>> Thanks,
>> David
>>
>> [1]
>> https://github.com/bokand/bokand.github.io/blob/master/web_viewports_explainer.md
>> [2] https://www.w3.org/TR/css-device-adapt-1/
>> [3] https://wicg.github.io/visual-viewport/index.html
>>
>>
>> It would be great to have a spec for viewports (basically covering the
>> stuff the explainer[1] talks about). That spec also needs to define what
>> coordinate systems are used for ALL THE THINGS (events,
>> getBoundingClientRect etc etc), as well as talking about what triggers the
>> firing of scroll events. This spec feels related to CSS OM View, so I'm not
>> sure if it would go into a level 2 of that spec, be its own spec.
>>
>> WebKIt has recently enabled the Visual Viewport API by default, so we
>> support that proposal.
>>
>> I don't think we're as keen on the CSS @viewport rule.
>>
>> Simon
>>
>>