Simon Fraser comments

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                                            Simon Fraser

Performance timeline - Long Animation Frames

Can we please qualify the "Long frames" and "Long tasks" APIs with "Performance Timing", since they are not new APIs in their own right; they are just new types of...

New 'onmove' event handler for the Window object

In general adding more API around window positions is not something WebKit is very interested in. I think we should trend in the other direction: web content has no business...

Assert hit in WebKit::RemoteImageBuffer::getShareableBitmap

How is this different from the previous version?

[cssom-view] Add segments property to visual viewport (#9237)

I have a few thoughts, mainly about potential for user fingerprinting based on how they generally use a foldable/multi-screen device. First, on a device that's foldable but with no hinge...

[css-scrollbars] Interaction between scrollbar-color and scrollbar-width with ::-webkit-scrollbar

There are two possible interactions I can see between the `scrollbar` style properties and the styled pseudo elements (`::-webkit-scrollbar` etc): 1. If `::-webkit-scrollbar` pseudos are specified, the UA uses them...

The mediaSession coordinator explanation seems to be incorrect.

@jernoble

WebPageProxy::DidReceiveEvent Type compatibility change

Fixing this in https://github.com/WebKit/WebKit/pull/8605

Shared Element Transitions API

WebKit supports the proposal. We will mark as Support one week from now, pending objections.

REGRESSION (Sonoma?): RTL scrollbar incorrect spacing

> REGRESSION (Sonoma?): RTL scrollbar incorrect spacing Is the Sonoma regression point still unknown?

Should we do percentage height quirk for calc()?

I agree with scoping the quirk down, and I'm good with the outcome of https://github.com/w3c/csswg-drafts/issues/3482.