[webkit-dev] Removing support for CSS regions

[Ryosuke Niwa]

On Mon, Jul 31, 2017 at 1:49 AM, Andreas Kling <akling at 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.

- R. Niwa