Re: DOMAttrModified not getting triggered

carglue wrote:
> So when the JavaScript engine executes web page script, and the script 
> sets some element properties dynamically, and Gecko is informed, and the 
> CSS rules engine chimes in

Hold on.  Where do the CSS rules come into this?  The example was 
setting .value; that's transparent to CSS.

But in general....

> and the content is reflowed by Gecko--during that entire sequence, there are no consumable notifications 
> available via any API at all?

Pretty much, yes.  You can get invalidate events if something needs to 
be repainted.  But some changes just don't affect the DOM, hence fire no 
DOM mutation events.

> Does it make a difference if an XPCOM 
> component is doing the listening,

Yes; you might be able to detect events A C++ XPCOM component using 
internal linkage can get certain notifications via nsIDocumentObserver 
and nsIMutationObserver.  In the setting .value case, the notification 
will most likely be the CharacterDataChanged notification on the 
anonymous textnode inside the input.

-Boris