Nowadays, there are many flavors for frontend frameworks and libraries in the market. There are frameworks you can use if you only want to manipulate the Document Object Model (DOM), frameworks used only for styling, frameworks for user-friendly components, frameworks used to design your project, and so on. Also there is Ext JS, a framework used to create Rich Internet Applications (RIA), but it has many other features than just pretty components.

In this book, we are going to learn how to develop an application from the beginning to the end with Ext JS 5, also covering some pieces of the backend required to make our application work. We will learn how to use Ext JS with hands-on examples covering some components, how they work, and how to use them in each chapter.

But first, you are going to learn what Ext JS is capable of if this is the first time you have come into contact with the framework.