This document discusses how to build applications that combine Ext JS components with Angular 2. It provides an overview of the new Angular 2 bridge for Ext JS, which allows Ext JS grids, trees, charts and other components to be used in Angular 2 apps. It demonstrates how to create Angular 2 components that utilize Ext JS components like grids, select fields and charts. It also shows how to create non-visual Ext JS classes like stores that can be used by the Angular 2 application. The document concludes with a demo of a sample Angular 2 application integrated with Ext JS.