Welcome to Ext JS 4.2

Sencha

Welcome to the Ext JS 4.2!

Ext JS 4.2 is a pure JavaScript application framework that works everywhere from IE6 to the latest Chrome. It enables you to create the best cross-platform applications using nothing but a browser, and has a phenomenal API.

View the Examples Discuss Ext JS 4 on the forum

What’s New

We have also been posting summaries of new features and changes to our blog:

Performance enhancement over 4.0
Grid
Border Layout
XTemplate
Overrides

Learn more on sencha.com

API Docs

Release Notes

Upgrading

Check out our upgrade guide to see what has changed.

Sencha also offers training courses and professional services for companies wishing to use Ext JS 4.