Ext JS 4 introduces big changes to the data package. There are new classes, and some of the old classes have been refactored to improve performance. With all these changes, the data package is more powerful and easier to use.
In this chapter, you will learn about the following:
We will take a look at the new classes of the data package and learn how to use them with real-world examples. In this chapter, you will also learn which features from Ext JS 3 are still compatible with Ext JS 4, so that you can migrate your code easily.
The Ext JS 4 data ...