> On Aug 2, 2017, at 2:40 AM, Andreas Kling <akl...@apple.com> wrote: > >> >> On 2 Aug 2017, at 01:03, Ryosuke Niwa <rn...@webkit.org> wrote: >> >> On Mon, Jul 31, 2017 at 1:49 AM, Andreas Kling <akl...@apple.com> wrote: >>> Some time has passed, and it seems that adoption of CSS regions on the web >>> is not gonna happen. >>> >>> Blink has long since removed their support. >>> Firefox never supported it AFAIK. >>> (The new) IE has some amount of support behind a prefix, but no plans to >>> unprefix AFAIK. >>> >>> I think it’s time we remove the code from WebKit, and relieve ourselves of >>> the maintenance burden. >>> This should also open up numerous opportunities for clean-up and >>> optimization. >>> >>> If you know of any reason to keep the feature, such as a major website or >>> WebKit client depending on it, do speak up now! >> >> Since we've been shipping CSS regions for a while, I think the first >> step we should take would be disabling the feature on trunk, and put >> that into STP and other ports' releases so that we can easily revert >> the change if we find out any Web content to be broken when the >> feature is disabled. > > Hi Ryosuke! > > Unless there is evidence of at least one major site or client depending on > CSS regions, I don’t agree that such a slow removal process is necessary. > > IMO doing that would only further increase the maintenance burden incurred by > the feature, since we’d have to add tons of runtime checks throughout the > codebase. > > I would feel differently if we were pioneering this removal, but since we’ve > already seen it succeed in Blink I’m far less concerned.
If we wanted to use extra caution, I think the more useful thing to do would be to add telemetry to an STP build instead of doing a test disable and waiting for bugs. That's likely to get as an answer much sooner. (It won't tell us about content for non-browser apps, but disabling in STP can't tell us that either.) - Maciej
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