[webkit-dev] Removing support for CSS regions

Dean Jackson dino at apple.com
Tue Aug 1 06:38:30 PDT 2017

I've been told that Amazon's Kindle Cloud Reader uses CSS Regions if available, and gets a significant performance boost. It has a fallback though.

Also, it would be worth checking at least Apple's iBooks store for any content that might have used regions. It would be a shame if purchased books stopped working :)


> On 31 Jul 2017, at 10:49, Andreas Kling <akling at apple.com> wrote:
> Hi folks,
> 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!
> The removal work will be tracked in this bug:
> https://bugs.webkit.org/show_bug.cgi?id=174978
> Cheers,
> kling
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