SP.Publishing.PageLayoutCreationInformation.newPageLayoutNameWithoutExtension property (sp.publishing)
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.Publishing.PageLayoutCreationInformation.get_newPageLayoutNameWithoutExtension()
SP.Publishing.PageLayoutCreationInformation.set_newPageLayoutNameWithoutExtension(value)