Javadoc
This method allows the removal of event listeners from the
event target. If an EventListener
is removed from
an EventTarget
while it is processing an event, it
will complete its current actions but will not be triggered
again during any later stages of event flow.
If an
EventListener
is removed from an
EventTarget
which is currently processing an event
the removed listener will still be triggered by the current
event.
Calling removeEventListener
with
arguments which do not identify any currently registered
EventListener
on the EventTarget
has
no effect.