event.target referencing element not attached to the DOM?

[Jonatan]

Hi,

I don't know if this is the correct forum or not, so please point me in the right direction if I'm blabbing in the wrong place.

To the issue at hand: Since updating to FF 15, I'm experiencing an issue where event.target in event handlers represents an element that is not the same element as the one found in the DOM (== comparison fails), but it seems like it's parent *is* the exact same element as in the DOM.

What I'm doing is intercepting click events on elements and then generating a (proprietary) search path for identifying the element (with or without ID attributes). This has worked fine before, but as of FF 15 I cannot verify that the search path represents the same element anymore since the element in the DOM != event.target.

Has anyone run into this problem or does anyone have any idea what the cause might be? Or a hint as to where I can find someone that has an idea?

Thanks!
/Jonatan

[Bobby Holley]

Hi Jonatan,

It might be related to compartment-per-global [1]. The best thing to do
would be to put together a reduced testcase (as small and simple as
possible) that works in FF14 but not in FF15, file a bug on
bugzilla.mozilla.org, and CC me. I'll try to take a look!

Cheers,
bholley

[1]
http://bholley.wordpress.com/2012/05/04/at-long-last-compartment-per-global/

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[Jonatan]

Thanks a lot, Bobby. That might very well be it since the case I'm struggling with is an extension to the Selenium IDE (recording interactions on webpages) combined with a Vaadin/GWT-based application, where the recorded element is sent to the GWT app, which in turn checks the equality.

I gather that the cross-compartment-wrappers should work transparently in cases like these? Or can I force it / explicitly create a cross-compartment-wrapper?

Off to create the reduced test case.

/Jonatan

[Bobby Holley]

Yeah, in general the wrappers should be totally undetectable in terms of
identity comparisons. CC me on the bug once you have a testcase.

Cheers,
bholley