The exact time of when a listener is called (before the change takes
place, during the change, or when the change has been made) depends
on the change event. The order in which listeners are called is the
order in which they are registered (First registered, first called.)
The exact time of when a listener is called (before the change takes
place, during the change, or when the change has been made) depends
on the change event. The order in which listeners are called is the
order in which they are registered (First registered, first called.)