Ext JS is an extremely full-featured library for complex layouts and dynamic widgets. Ext JS is especially useful for mimicking desktop applications in a browser. While the library is a heavier dependency and in turn a larger download than jQuery UI, it does provide a more robust tool set.
Ext JS links:
Note that the entire Ext JS example set and documentation is available in the ext directory packaged with this workshop. Spend a bit of time exploring the Ext examples and figuring out how to use the documentation.
Given a basic understanding of Ext JS, you’re ready to move on to creating an opacity slider.
