Although Sencha Cmd is a very useful tool for application scaffolding, creating view, controllers and models, sometimes it is faster to use a single-file app. It is especially useful for fast testing, prototyping or concept proof. Read how to do it.
Chained Stores, introduced in ExtJS 5, allow to use one store in multiple views with independent filtering and sorting. This article discusses what they really are, what are drawbacks and it also provides a playground application that.
ExtJS grid renderers are the powerful tool that can, if used correctly, greatly enhance the user interface. However, you can run into several gotchas. This article demonstrates what problems can renderers introduce and explains how to avoid them.
Although xtype has been around since Ext 2.0, there is still a lot of confusion on what it is, how can it be used and what it is good for. The clarification in this article gives you all information you need to use xtype (and other [a-z]types) effectively.