The custom web tier components for JSF can be developed using AJAX along with JSF. Using JSF the state of an application, event handling, input validation and page navigation tasks can be done for user interface components. AJAX technology is used for client side Java Script leverage in order to provide richer and more responsive user experience.

To implement the JSF component for spell check text area, the following tag is used.

<jcr: spellCheckTextArea cols="30" rows="15" value="# {user.interests}" />

This component extends HtmlInputTextArea provides a simple AJAX-enabled spell checking facility