The argument for the events of the ContextMenu popup.
The DOM event that started the action.
The ContextMenuComponent that triggered the event.
The target element for which the ContextMenu is opened.
true if the event was prevented
by any of its subscribers.
true if the default action was prevented.
Prevents the default action for a specified event.
In this way, the source component suppresses
the built-in behavior that follows the event.