Book Image

Getting Started with NativeScript

By : Nathanael J. Anderson
Book Image

Getting Started with NativeScript

By: Nathanael J. Anderson

Overview of this book

NativeScript allows you to build a fast cross-platform application that has a native UI. NativeScript is a true cross-platform framework that generates native speed applications using the native components of the host platform, all using JavaScript. Although NativeScript allows you to build your application in JavaScript, you have full access to the host OS from your code, allowing you to easily tweak or use new platform features instantly at native code speeds. Whether you have already developed multiple applications or zero applications, this book will help you to develop your next application in a cross-platform framework quickly, saving you a massive amount of time and money. This book concisely shows you NativeScript’s built-in framework that allows you to rapidly develop a fully-working compiled cross-platform application in just a few chapters. It starts by laying the foundation of NativeScript and working through the fundamentals to create a basic shell of the application. Moving on, you’ll see how to build a full-fledged application step by step. We’ll show you how to use plugins, and how to communicate with the native OS libraries easily so that you can customize your application as if your app was created in Java or Objective C. We then deal with the issues that arise from being cross platform and compensate for the different screen sizes, screen resolutions, and device abilities. Finally, we progress to testing and deploying your app.
Table of Contents (15 chapters)
Getting Started with NativeScript
About the Author
About the Reviewer


Binding is what allows us to do <Edit value="{{ message }}"> in the Declarative UI and have it automatically update the edit value when the message value changes. The Bindable component handles all the binding and the callbacks for any bindable properties.

Using binding is actually simple. You need a source object, in this case, the message variable. You need the component itself, so again, in this example, the Edit component. Then, you just use the bind method on the Edit component to bind the source object to itself. Likewise, if you need to unbind, you would use the method named unbind.

The final property of the Bindable component is bindingContext, which is used to set the primary Observable object of the component and its children. If you recall in the prior chapter, the main-page.js file executed page.bindingContext = vmModule.mainViewModel. This code sets the page's bindingContext to the Observable object the mainViewModel file exported. This is needed so that the two...