Get to know Ext JS Ext JS began as a project to extend the functionality that the YUI Library offered. A key aspect of the YUI Library is the cross-browser support, which you'll also find in Ext JS. This support allows you to build Web applications without worrying about the target browser. Ext JS provides excellent performance. The framework is fully object oriented and extensible. Because it's written in the JavaScript language, Ext JS's features are ready to use after you download and install it. Ext JS browser support The Ext JS framework is supported in all the major Web browsers, including: * Windows® Internet Explorer® version 6 and later. * Mozilla Firefox version 1.5 and later (PC and Macintosh). * Apple Safari version 2 and later. * Opera version 9 and later (PC and Mac). Design patterns and Ext JS Developers should appreciate the well-thought-out design and implementation of Ext JS. Its object-oriented design pa
A foundation you can build.