[Bug 18455] [Shadow]: Stop 'load' and 'error' events at shadow boundaries

https://www.w3.org/Bugs/Public/show_bug.cgi?id=18455

--- Comment #4 from Shinya Kawanaka <shinyak@chromium.org> 2012-08-08 05:17:51 UTC ---
(In reply to comment #3)
> Let me reopen this.
> 
> It sounds reasonabe, but there are some use cases that we must handle.
> 
> When I tried to add 'load' and 'error' events to the 'stop' list, some layout
> tests in WebKit started to fail.
> One of them is a fast/dom/shadow/shadowdom-for-image-dynamic.html.
> 
> We have some layout tests which depends on an assumption like the following:
>   1. <img> element, which will be a shadow host, has a 'onload' listener.
>   2. A user adds a shadow root to the <img> element.
>   3. The listener registered on the shadow host should still receive a 'load'
> event for the 'image'.
> 
> So we will break the compatibility in this case.

Yeah, I think this change will conflict to replaced elements spec.

When considering Replaced Elements like <img>, it seems natural that 'load'
event is fired on
a special element in the shadow subtree of <img>, because an element in shadow
subtree would like to
handle 'load' event.

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Received on Wednesday, 8 August 2012 05:17:53 UTC