[Webkit-unassigned] [Bug 179122] -webkit-scroll size and position not painted correctly under browser zoom

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=179122

--- Comment #3 from Danyao Wang <danyao at chromium.org> ---
The impact on real websites is probably not too large. I spent 30 minutes digging through URLs from HTTPArchive that use -webkit-scrollbar, and only found one website where the problem is somewhat visible:

http://www.toixemphim.net/p/lich-phim.html

Even in this case, I'd have to zoom in to see the buggy behavior. Movie attached.

HTTPArchive data reports ~3% CSS files out there in the wild uses this prefix. But it's hard to tell whether that translate into user visible impact. >From the small sample size of ~100 URLs I looked at, it seems that either the style is not applied to the main element, so this bug is not manifesting, or the scrollbar is so small the effect of the bug is minimal. I wish we have better tools to know when custom scrollbar is actually rendered.

Just a wild question: would you consider deprecating support for webkit-scrollbar? Most mainstream sites don't seem to use it anyways...

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