LGTM3

I'm torn about what standard to hold ourselves to when another vendor has
already shipped an API without a spec. I think a basic explainer and a
reasonable set of web platform tests is a good minimum bar though to ensure
interop with the already shipped API. So, thanks for taking that on.

On Fri, Jun 29, 2018 at 7:15 AM Becca Hughes <[email protected]>
wrote:

> Thank you Chris and Rick for the LGTMs. We still need one more API owner
> to approve.
>
> On Thu, Jun 28, 2018, 5:02 PM Chris Harrelson <[email protected]>
> wrote:
>
>> LGTM3
>>
>> On Thu, Jun 28, 2018 at 12:21 PM Rick Byers <[email protected]> wrote:
>>
>> > [Dropping mozilla-dev-tech-layout since it's a subscribers-only list]
>> >
>> > That explainer looks great to me, thanks! I added a link to the
>> chromestatus
>> > entry <https://www.chromestatus.com/feature/5710044637167616>.
>> >
>> > It's sad that we still don't really have a proper spec for the meta
>> > viewport tag, just the apparently stalled device adaptation spec
>> > <https://drafts.csswg.org/css-device-adapt/>. But at least between that
>> > and the round display draft
>> > <https://drafts.csswg.org/css-round-display/#viewport-fit-descriptor>
>> there's
>> > kinda an existing definition for the viewport-fit token. I guess there's
>> > not really any reasonable way to write a web-platform-test for the
>> > viewport-fit behavior. We'd have to add a WebDriver command to simulate
>> a
>> > display cut-out <https://github.com/web-platform-tests/wpt/issues/11718
>> >,
>> > and also come up with some mitigation
>> > <https://github.com/web-platform-tests/wpt/issues/11717> for the fact
>> > that mobile viewports are really an Android-only behavior in Chrome at
>> the
>> > moment. That's a fair amount of work, and IMHO not worth blocking this
>> > feature on.
>> >
>> > LGTM2
>> >
>> > On Thu, Jun 28, 2018 at 1:48 PM Becca Hughes <[email protected]>
>> > wrote:
>> >
>> >> Here is an explainer for the feature:
>> >>
>> https://docs.google.com/document/d/1lbZi18_5cMlLOphpFqTbuI4B0YGykQvvtRbw6j67UyE/edit
>> >>
>> >> Thanks,
>> >> Becca
>> >>
>> >> On Thu, Jun 28, 2018 at 9:35 AM, 'Alex Russell' via
>> >> mozilla.dev.tech.layout <[email protected]>
>> wrote:
>> >>
>> >>> Hey all,
>> >>>
>> >>> API OWNERS met this morning and while we're not exercised about the
>> lack
>> >>> of
>> >>> spec text, the linked design docs don't fill the role of an Explainer:
>> >>>
>> >>>
>> >>>
>> >>>
>> https://docs.google.com/document/d/1cJs7GkdQolqOHns9k6v1UjCUb_LqTFVjZM-kc3TbNGI/edit?usp=sharing
>> >>>
>> >>> That is, it isn't clear what problems this is solving, why these
>> >>> (relatively large) proposals are the correct way to solve them, or
>> what
>> >>> the
>> >>> considered alternatives are. Rubber-stamping the
>> >>> launched-without-consultation (or even Origin Trial) additions of
>> >>> another
>> >>> vendor without that sort of deliberation is very much a non-goals, so
>> if
>> >>> there are docs that could stand in for an Explainer here, that would
>> >>> help
>> >>> unblock my LGTM.
>> >>>
>> >>> Thanks!
>> >>>
>> >>> On Thursday, June 28, 2018 at 7:24:48 AM UTC-7, Becca Hughes wrote:
>> >>> >
>> >>> >
>> >>> >
>> >>> > On Wed, 27 Jun 2018, 23:40 Yoav Weiss, <[email protected]
>> <javascript:>>
>> >>> > wrote:
>> >>> >
>> >>> >> On Thu, Jun 28, 2018 at 8:32 AM Yoav Weiss <[email protected]
>> >>> <javascript:>>
>> >>> >> wrote:
>> >>> >>
>> >>> >> > On Thu, Jun 28, 2018 at 12:32 AM Becca Hughes <
>> >>> [email protected]
>> >>> >> <javascript:>>
>> >>> >> > wrote:
>> >>> >> >
>> >>> >> >> We have been looking into the test failures and believe we have
>> >>> found
>> >>> >> the
>> >>> >> >> cause. It looks like env() is switched off on some iOS devices.
>> >>> >> >>
>> >>> >> >> The feature can be switched on by going to Settings > Safari >
>> >>> >> Advanced >
>> >>> >> >> Experimental Features > Constant Properties. With the feature
>> >>> enabled
>> >>> >> all
>> >>> >> >> the WPT tests pass.
>> >>> >> >>
>> >>> >> >>
>> >>> >> > So, the feature is shipped in some iOS devices but not others? Do
>> >>> we
>> >>> >> know
>> >>> >> > if it's a matter of Safari version? Or some other criteria?
>> >>> >> >
>> >>> >>
>> >>> >
>> >>> > The original launch announcement from Apple cites that you need at
>> >>> least
>> >>> > iOS 11.2 beta.
>> >>> >
>> >>> >
>> >>> >> Or did they ship this only on some hardware devices but not others?
>> >>> >>
>> >>> >
>> >>> > I am not sure about the exact details but at least in their repo it
>> is
>> >>> on
>> >>> > by default:
>> >>> >
>> >>> >
>> >>> >
>> >>>
>> https://github.com/WebKit/webkit/blob/01ff8c715bb788e0d721948c7d7acd7d5cfa06c3/Source/WebKit/Shared/WebPreferences.yaml#L1058
>> >>> >
>> >>> >
>> >>> >>
>> >>> >> >
>> >>> >> >
>> >>> >> >
>> >>> >> >> On Tue, Jun 26, 2018 at 4:15 PM, Becca Hughes <
>> >>> [email protected]
>> >>> >> <javascript:>>
>> >>> >> >> wrote:
>> >>> >> >>
>> >>> >> >>> Hi Rick,
>> >>> >> >>>
>> >>> >> >>> I tested this on an iPhone 6 running iOS 11.4, as well as a Mac
>> >>> >> (Safari
>> >>> >> >>> 11.1.1) and iPhone Simulator running iOS 11.4 on both the
>> iPhone
>> >>> 8 and
>> >>> >> >>> iPhone X and for me all the tests are passing. The Safari
>> version
>> >>> is
>> >>> >> >>> AppleWebKit/605.1.15 Mobile/15E148 Safari/604.1.
>> >>> >> >>>
>> >>> >> >>> On your iPhone if you type in "show user agent" to Google in
>> >>> Safari it
>> >>> >> >>> should show you what version of Safari you are running. I
>> wonder
>> >>> if
>> >>> >> for
>> >>> >> >>> some reason your iPhone is running an older build of Safari.
>> >>> >> >>>
>> >>> >> >>> Thanks,
>> >>> >> >>> Becca
>> >>> >> >>>
>> >>> >> >>> On Tue, Jun 26, 2018 at 2:25 PM, Rick Byers <
>> [email protected]
>> >>> >> <javascript:>> wrote:
>> >>> >> >>>
>> >>> >> >>> > Becca, thank you for getting all the environment variables
>> >>> you're
>> >>> >> >>> > supporting added to some draft spec, and tentative
>> >>> >> web-platform-tests
>> >>> >> >>> > landed - I agree with the earlier discussions that this is a
>> >>> >> >>> pre-requisite
>> >>> >> >>> > to shipping (even when Safari has sadly shipped without
>> having
>> >>> >> >>> invested in
>> >>> >> >>> > such engineering discipline).
>> >>> >> >>> >
>> >>> >> >>> > Ideally we'd have the rest of the env() behavior that we're
>> >>> shipping
>> >>> >> >>> fully
>> >>> >> >>> > specified somewhere (even if not yet agreed upon), but given
>> >>> that
>> >>> >> >>> Safari
>> >>> >> >>> > has already shipped and developers are starting to depend on
>> >>> it, I'm
>> >>> >> >>> pretty
>> >>> >> >>> > confident that either the spec will end up following what's
>> >>> already
>> >>> >> >>> been
>> >>> >> >>> > shipped in Safari, or WebKit will agree on breaking changes
>> we
>> >>> feel
>> >>> >> we
>> >>> >> >>> can
>> >>> >> >>> > make. So I'm not convinced we'd get any real-world
>> >>> interoperability
>> >>> >> >>> value
>> >>> >> >>> > by blocking our ship further on getting the additional
>> details
>> >>> added
>> >>> >> >>> to the
>> >>> >> >>> > spec, instead of just continuing to incubate and iterate.
>> >>> >> >>> >
>> >>> >> >>> > However it is important to ensure we are actually shipping
>> >>> something
>> >>> >> >>> > that's interoperable with Safari including the edge cases. I
>> >>> just
>> >>> >> ran
>> >>> >> >>> all
>> >>> >> >>> > the tests at https://w3c-test.org/css/css-env on an iPhone
>> >>> (iOS
>> >>> >> 11.4)
>> >>> >> >>> and
>> >>> >> >>> > see that most of them are failing (eg. every "syntax" test
>> >>> fails
>> >>> >> with
>> >>> >> >>> > "assert_equals expected "rgba(0, 0, 0, 0)" but got "rgb(0,
>> 128,
>> >>> >> 0)").
>> >>> >> >>> > They're passing on a Mac (Safari 11.0.3) and when I use an
>> >>> iPhone X
>> >>> >> on
>> >>> >> >>> > browserstack.com (iOS 11, can't tell which point release),
>> so I
>> >>> >> >>> suspect
>> >>> >> >>> > one of Mobile safari's non-standard quirks (maybe something
>> >>> about
>> >>> >> >>> viewport
>> >>> >> >>> > behavior?), but I didn't try to debug them. Do you have
>> access
>> >>> to an
>> >>> >> >>> iPhone
>> >>> >> >>> > you can try debugging with, just to double-check that we
>> really
>> >>> are
>> >>> >> >>> > shipping something that behaves the same on Chrome Android as
>> >>> Safari
>> >>> >> >>> iOS?
>> >>> >> >>> >
>> >>> >> >>> > Rick
>> >>> >> >>> >
>> >>> >> >>> >
>> >>> >> >>> > On Tue, Jun 26, 2018 at 12:57 AM Becca Hughes <
>> >>> >> >>> [email protected] <javascript:>>
>> >>> >> >>> > wrote:
>> >>> >> >>> >
>> >>> >> >>> >> The spec pull request to define the safe area variables has
>> >>> been
>> >>> >> >>> merged
>> >>> >> >>> >> and is now part of the spec
>> >>> >> >>>
>> >>> >> >> >> <https://drafts.csswg.org/css-env-1/#safe-area-insets>.
>> >>> >> >>
>> >>> >> >>
>> >>> >> >>> >>
>> >>> >> >>> >> (@David - thanks again for reviewing the PR)
>> >>> >> >>> >>
>> >>> >> >>> >> On Mon, Jun 25, 2018 at 2:55 PM, L. David Baron <
>> >>> [email protected]
>> >>> >> <javascript:>>
>> >>> >> >>> >> wrote:
>> >>> >> >>> >>
>> >>> >> >>> >>> On Monday 2018-06-25 13:18 -0700, Becca Hughes wrote:
>> >>> >> >>> >>> > >> On Fri, Jun 22, 2018 at 12:47 AM, Rune Lillesveen <
>> >>> >> >>> >>> [email protected] <javascript:>> wrote:
>> >>> >> >>> >>> > >>> The CSSWG resolved on four values and edits to be
>> made
>> >>> to
>> >>> >> CSS
>> >>> >> >>> >>> Variables
>> >>> >> >>> >>> > >>> Level 2[1]. Do we have a resolution overriding that
>> to
>> >>> put
>> >>> >> it
>> >>> >> >>> in a
>> >>> >> >>> >>> separate
>> >>> >> >>> >>> > >>> spec?
>> >>> >> >>> >>> > >>>
>> >>> >> >>> >>> > >>> I would not be comfortable shipping this without
>> having
>> >>> >> these
>> >>> >> >>> four
>> >>> >> >>> >>> > >>> values put in a spec with a description of what they
>> >>> are.
>> >>> >> >>> >>> > >>>
>> >>> >> >>> >>> > >>
>> >>> >> >>> >>> > >> I am not sure about the resolution, I will let @Tab
>> >>> answer
>> >>> >> that
>> >>> >> >>> one.
>> >>> >> >>> >>> > >>
>> >>> >> >>> >>> > >> I added a pull request to add them to the spec:
>> >>> >> >>> >>> https://github.com/w3c/csswg-drafts/pull/2807
>> >>> >> >>> >>> > >>
>> >>> >> >>> >>> > >
>> >>> >> >>> >>> > It looks like Tab will be OOO for the next couple of
>> weeks,
>> >>> but
>> >>> >> >>> this
>> >>> >> >>> >>> > shouldn't block launch.
>> >>> >> >>> >>>
>> >>> >> >>> >>> I think the underlying objection here is that we don't want
>> >>> to get
>> >>> >> >>> >>> in a situation where multiple implementations are shipping
>> a
>> >>> >> feature
>> >>> >> >>> >>> that doesn't have a specification.  I don't think that
>> >>> something
>> >>> >> >>> >>> being in Tab's backlog of specification editing in an
>> >>> acceptable
>> >>> >> >>> >>> resolution to that, given the size of his backlog.
>> >>> >> >>> >>>
>> >>> >> >>> >>> I also don't want to be in a situation where Tab is the
>> single
>> >>> >> >>> >>> person gating new features; other people should be able to
>> >>> edit
>> >>> >> CSS
>> >>> >> >>> >>> specifications, particularly when given appropriate
>> mentoring
>> >>> and
>> >>> >> >>> >>> advice.
>> >>> >> >>> >>>
>> >>> >> >>> >>> So I'd be substantially happier here if there were a
>> >>> specification
>> >>> >> >>> >>> before a second implementation shipped, but I also think
>> >>> getting
>> >>> >> >>> >>> that specification done shouldn't require any one
>> particular
>> >>> >> person
>> >>> >> >>> >>> to be involved.
>> >>> >> >>> >>>
>> >>> >> >>> >>> -David
>> >>> >> >>> >>>
>> >>> >> >>> >>> --
>> >>> >> >>> >>> 𝄞   L. David Baron
>> >>> http://dbaron.org/
>> >>> >>  𝄂
>> >>> >> >>> >>> 𝄢   Mozilla
>> >>> https://www.mozilla.org/
>> >>> >>  𝄂
>> >>> >> >>> >>>              Before I built a wall I'd ask to know
>> >>> >> >>> >>>              What I was walling in or walling out,
>> >>> >> >>> >>>              And to whom I was like to give offense.
>> >>> >> >>> >>>                - Robert Frost, Mending Wall (1914)
>> >>> >> >>> >>>
>> >>> >> >>> >>
>> >>> >> >>> >> --
>> >>> >> >>> >> You received this message because you are subscribed to the
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>> >>> >> >>> Groups
>> >>> >> >>> >> "blink-dev" group.
>> >>> >> >>> >> To view this discussion on the web visit
>> >>> >> https://groups.google.com/a/
>> >>> >> >>> >>
>> chromium.org/d/msgid/blink-dev/CAFeLsELTCuBL83Dd6kOnEfNQGUpdO
>> >>> >> >>> >> JV7VnVeV-7Bo-78oraG6A%40mail.gmail.com
>> >>> >> >>>
>> >>> >> >> >> <
>> >>> >> >>>
>> >>> >>
>> >>>
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFeLsELTCuBL83Dd6kOnEfNQGUpdOJV7VnVeV-7Bo-78oraG6A%40mail.gmail.com?utm_medium=email&utm_source=footer
>> >>> >> >>> >
>> >>> >> >>> >> .
>> >>> >> >>> >>
>> >>> >> >>> >
>> >>> >> >>>
>> >>> >> >>
>> >>> >> >> --
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>> >>> >> >> To view this discussion on the web visit
>> >>> >> >>
>> >>> >>
>> >>>
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFeLsELjgh5773%3DJpR7VdqqfUFqCpfQ7JzjN_ENdJhjafEABRA%40mail.gmail.com
>> >>> >> >> <
>> >>> >>
>> >>>
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFeLsELjgh5773%3DJpR7VdqqfUFqCpfQ7JzjN_ENdJhjafEABRA%40mail.gmail.com?utm_medium=email&utm_source=footer
>> >>> >> >
>> >>> >> >> .
>> >>> >> >>
>> >>> >> >
>> >>> >>
>> >>> >
>> >>>
>> >>
>> >> --
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>> >> <
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFeLsE%2BkJugFcOhaMxtBThZezroAPZTY1QaMSXW0oHDnu105Yg%40mail.gmail.com?utm_medium=email&utm_source=footer
>> >
>> >> .
>> >>
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>> > <
>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFUtAY-KpYMW6Sr_a3JPZPjGWmisFM0%3D%2BP6w3nofH9MpEcQ7KQ%40mail.gmail.com?utm_medium=email&utm_source=footer
>> >
>> > .
>> >
>>
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