Learning how to understand a single line of code, building that first "Hello World" script, and experiencing the thrill when it works as you expect are the small steps that draw us into the world of programming. This book is about the projects we can build in this world using Sencha's Ext JS 5 and how to ensure you're building on a strong foundation.

In this chapter, we're going to examine why strong application architecture is important from a theoretical and practical point of view. We'll introduce the rest of the book and answer the following questions:

Let's start with talking about what we mean by software architecture and why it's important for a successful project.