To get started with NativeScript, we will first write a simple app. In src/app.ts, we must register mainEntry that will create the view of the app. The entry should be a function that returns a Page. A Page attribute is one of the classes that NativeScript uses for the user interface. We can create a basic page as follows:

import * as application from "application"; 
import { Page } from "ui/page"; 
import { Label } from "ui/label"; 
 
application.mainEntry = () => { 
  const page = new Page(); 
  const label = new Label(); 
  label.text = "Hello, World"; 
  page.content = label; 
  return page; 
}; 
application.start(); 

This will create a single label and add it to the page. The content of the page should be a View class, which is the base class that all components (including Label) in NativeScript inherit.

You can run the app with one of the following commands for Android and iOS, respectively:

tns...