Why is it important?

While Ext JS was developed under the assumption that its users will most likely work with Sencha Cmd too, there's no hard and fast rule that dictates that it must be used.

Note

We're not going to cover the installation of Sencha Cmd here. The latest installer is available on the Sencha website (http://www.sencha.com/) and should be a straightforward process.

In the next few pages, we'll create a small application without using Sencha Cmd and examine a couple of sticking points we'll hit on the way.

The act of creation

One of these sticking points comes up straightaway. With Sencha Cmd, creating a new application is as easy as the following command:

sencha -sdk ~/<path-to-ext-sdk> generate app MyApp ./my-app

Within seconds, Sencha Cmd creates a new directory called my-app containing the following:

• The specified Ext JS SDK
• An app directory containing model, controller, store, and view directories
• The app.js, app.json, and Application.js files
• The index...