Refined Components Grids are faster, lighter, and easier to customize than ever in Ext JS 4. Grid HTML markup is drastically reduced and has built-in intelligence — rendering only markup needed for features enabled in your app.
Advanced Data The Ext JS 4 Data package enables you to retrieve, decode and use data in your web apps. The data package has been completely rewritten for version 4, while using the same approach as previous versions.
Custom Theming Ext JS 4 harnesses technology originally developed for Sencha Touch to make the framework more themeable than ever. Every aspect of the framework's appearance can be customized, often in a single variable.
Layouts Ext JS 4 has a fully refactored layout engine with higher efficiency and performance — as well as brand new layouts like DockLayout, and more!
Learning Resources With our new API Docs viewer and helpful guides, Ext JS 4 is more approachable than ever. Dive in and make something amazing today!
Get up to speed on Ext JS 4 with Sencha Training Our hands-on course is designed for experienced Ext JS 3 developers and covers the new features in Ext JS 4, including the Ext Core Class System, the new Data Model, Forms, Layouts, Charting & Drawing, new Grid features, Theming with Sass, and Sencha MVC.