The current DOM Level 3 Events Specification mentions that Mutation Events are deprecated, their usage is clearly discouraged. Developers should use instead the Mutation Observers in the DOM 4 specifications (working draft...).
Ext JS 4 supports deprecated mutation events only.
I've been working for few days with mutation events, since there was no alternatives in Ext JS 4, but as I was afraid so, mutation events are not well supported or there is no common behaviour in today's browsers (FF, Chrome, IE, ...). On the other hand, mutation observers support seems to be good enough on FF, Safari and Chrome to rely on it (no support on IE9 and IE10).
Is mutation observers support planned in the roadmap of Ext JS 4?
If yes, what is the expected date of delivery/milestone?
If no, shall the answer to this question be yes as soon as possible? :-)
Thanks for your clarifications.