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Since Wicket Ajax now register DOM events (like click, change, ...) instead of using inline attributes like onclick, onchange, ... there is no more a script to decorate. Instead the new implementation provides points to listen to:

• precondition before handler - executed before the data for the Ajax call is calculated. Even before the preconditions.
• precondition - if earlier. If it returns false then the Ajax call (and all handlers below) is not executed at all
• before beforeSend handler - executed before the fire actual execution of the Ajax call.
• after handler - if the Ajax call is asynchronous then it is executed right after its firing. If it is synchronous then it is executed after the complete handler
• success handler - executed on successful return of the Ajax call
• failure handler - executed on unsuccessful return of the Ajax call
• complete handler - executed on both successful and unsuccessful return

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IAjaxCallListener's can be used to listen for the lifecycle of an Ajax call for a specific component.
If the user application needs to listen for all Ajax calls then it may subscribe to the following topics:

• /ajax/call/before
• /ajax/call/beforeSend
• /ajax/call/after
• /ajax/call/success
• /ajax/call/failure
• /ajax/call/complete

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