SP.Publishing.Navigation.StandardNavigationSettings.source property (sp.publishing)
Gets or sets the configuration for the global navigation or the current navigation (the standard navigation scheme).
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.Publishing.Navigation.StandardNavigationSettings.get_source()
SP.Publishing.Navigation.StandardNavigationSettings.set_source(value)