To use the AJAX tags from 2.1 on you must:
- Include the Dojo Plugin distributed with Struts 2 in your /WEB-INF/lib folder.
- Add <%@ taglib prefix="sx" uri="/struts-dojo-tags" %> to your page.
- Include the headon the page, which can be configured for performance or debugging purposes.
Most of the AJAX tags use Dojo topics for event notification and communication between them, to learn about topics visit Dojo's documentation