build a 100% native mobile app using JavaScript 

build a 100% native mobile app using JavaScript 

  
Check this out, you can build a 100% native mobile app using JavaScript https://www.nativescript.org/ (no it's not a hybrid app like Apache cordova and no it's not better than xamarin but still quite cool)
But imagine if OutSystems could compile the platform code to this... You'd have true off-line apps! :)