SP.SecurableObject.hasUniqueRoleAssignments property (sp.js)
Gets a value that specifies whether the role assignments are uniquely defined for this securable object or inherited from a parent securable object.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.SecurableObject.get_hasUniqueRoleAssignments ()
Return value
Type: Boolean