SP.Principal.isHiddenInUI property (sp.js)
Gets a value that indicates whether this member should be hidden in the UI.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.Principal.get_isHiddenInUI ()
Return value
Undefined
Remarks
Members are not hidden across all SharePoint UI, but can optionally be hidden to improve the user experience.