SP.ChangeQuery.systemUpdate property (sp.js)
Gets or sets a value that specifies whether updates made using the item SystemUpdate method are included in the query.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.ChangeQuery.get_systemUpdate ()
var value = SP.ChangeQuery.set_systemUpdate ()
Return value
Type: Boolean