In this chapter, we have covered the new Ext JS 4 SDK, learned how to use its new files, the new way to use adapters, and how to use Ext JS 3 (or older versions) along with Ext JS 4. We also covered a very quick overview of the new components and what has changed in the existing ones. We also learned how to use the overhauled documentation and how the packages are organized.
We learned, through examples, how to use the new features from the new class system—for example, how to define a class without using the
new keyword; how to use
config declaration to auto generate methods, getters, and setters; the statics declaration; and how the dynamic class loading works.
In the next chapter, we will learn about the new Ext JS 4 data ...