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Ext JS 4 First Look by Loiane Groner

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Chapter 1. What's New in Ext JS 4?

Ext JS 4 is the biggest overhaul that has been made to the Ext framework. These changes include a new class system, introduction of a new platform, many API changes and enhancements, and new components, such as the new charts and new draw components. Ext JS 4 is faster, more stable, and easy to use.

In this chapter, you will learn the following:

  • How to get started with Ext JS 4
  • How the Ext JS platform is now organized
  • The new Ext JS 4 class system
  • Ext JS 4 SDK
  • Ext JS 3 versus Ext JS 4 compatibility
  • Migrating from Ext JS 3 to Ext JS 4
  • A quick overview of new components

Getting started with Ext JS 4

Ext JS is a cross-browser RIA (Rich Internet Application) framework, easy to use with rich UI components, used by one million ...

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