Comments on: MozAfterPaint: Being able to get a callback event on repaint

By: eyelidlessness

eyelidlessness — Wed, 15 Oct 2008 18:28:49 +0000

I’ve been using DOMSubtreeModified and comparing dimensions to a cache, but this performs badly. (It does perform better with the check against a cache than without, to be clear.) :(

By: TNO

TNO — Wed, 15 Oct 2008 03:24:52 +0000

After a little more research, perhaps onpropertychange for IE, and addEvent(“DOMAttrModified”…..) for the rest

By: eyelidlessness

eyelidlessness — Wed, 15 Oct 2008 02:56:15 +0000

@TNO: Unfortunately, only IE supports onresize firing for element dimension changes; all other browsers only fire onresize when the window changes dimensions, regardless of where the event is attached.

By: TNO

TNO — Tue, 14 Oct 2008 17:41:26 +0000

Perhaps this (untested)?
http://msdn.microsoft.com/en-us/library/ms536959(VS.85).aspx

By: eyelidlessness

eyelidlessness — Tue, 14 Oct 2008 16:02:09 +0000

Can’t you basically do this with the DOMSubtreeModified event? Am I misunderstanding or is this just sugar around that event?
.
Incidentally, I’d love to be able to get an event specifically when an element’s dimensions change. Does anyone know of anything like that?

By: Schill

Schill — Tue, 14 Oct 2008 15:54:52 +0000

This could be cool for performance testing, ie., literally highlighting how JS may cause larger reflow operations than you might intend and perhaps helping find more optimal ways to update the DOM.

I think the flash player’s context menu includes “show redraw regions” as one of the items, which is neat.