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Tapestry 5.4.2 introduced an API which makes it easy for server-side events to be invoked from JavaScript. On the server-side, you first need to annotate the event handler methods you want to expose with the @PublishEvent annotation. Then, in JavaScript, all you need to do is to call the existing  t5/core/ajax  function, but with slightly different parameters.

The t5/core/ajax function has two parameters: url and options. Prior to Tapestry 5.4.2, the first one was difficult to get when doing AJAX requests to event handler methods. You needed to inject ComponentResources in your component class, call componentResources.createEventLink() for each event handler method, then pass all this information back to the browser through one of the JavaScriptSupport methods. For Tapestry 5.4.2 and later, your JavaScript code only needs to know the event name (also called event type) and optionally indicate a DOM element to be used as a starting point for finding the event URL.

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