Event fired after a burst of propchange events settles within a microtask.
e.changed is a Map<name, oldValue> carrying the net first→last delta;
oldValue is the stored internal value (parsed + converted) before the
first change in the burst, mirroring propchange's e.oldValue. Current
values are read via this[name] inside the handler.
Event fired after a burst of
propchangeevents settles within a microtask.e.changedis aMap<name, oldValue>carrying the net first→last delta;oldValueis the stored internal value (parsed + converted) before the first change in the burst, mirroringpropchange'se.oldValue. Current values are read viathis[name]inside the handler.