In this chapter, we explored the application we will implement throughout the chapters of this book in a lot of depth. We also covered all the requirements to create the development environment for this application. You learned how to create the initial structure of an Ext JS MVC application.

You also learned, through examples, how to create a splash screen (also known as the loading screen), manipulating the DOM using the Ext.dom.Element class. You learned the steps how to start up an Ext JS application and also learned the difference between the init and launch methods from Ext.application. We left Application.js ready to display its first screen, which will be a login screen, and which you will learn how to implement in the next chapter.