Since open sourcing the project, JXcore team hasn't made any claims on code protection. The project is clearly focusing on running Node on mobile devices and ease of deployment. Regrettably, the author has overlooked this.
I am not sure if you read the whole text. But it clearly says in the first paragraph "This article will examine JavaScript and Node.js/JXcore and view them from a business standpoint". It is not trying to be a technical article.