SP.NavigationNode.url property (sp.js)
Gets or sets a value that specifies the URL stored with the navigation node.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.NavigationNode.get_url ()
var value = SP.NavigationNode.set_url ()
Return value
Type: String
Remarks
It must be a URL of relative form if IsExternal is false. It must be a URL of relative or absolute form.