SP.Publishing.Navigation.NavigationTerm.isPinned property (sp.publishing)
Indicates whether a SP.Taxonomy.Term constructor (sp.taxonomy) object is a pinned term.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.Publishing.Navigation.NavigationTerm.get_isPinned()
Return value
true if the taxonomy term is a pinned term; otherwise, false.