How can I insert my JavaScript functions into the JSF event queue for processing?

Is there a way to tap into the default JSF ajax(JS) event queuing system in order to execute events sequentially?

I am attempting to align my JS events with this queue. Is there a global variable that can facilitate this synchronization?

Answer №1

If you're looking to add event listeners on JSF ajax requests, you can utilize <f:ajax onevent> along with jsf.ajax.addOnEvent. By doing so, you can run JavaScript code before sending the ajax request, after receiving the response, and/or once the HTML DOM is updated. This approach could potentially meet your specific requirements.

Here's an example of how the event listener function can be structured:

function someAjaxEventListener(data) {
    var status = data.status;

    switch(status) {
        case "begin":
            // Executed just before the ajax request is sent.
            break;

        case "complete":
            // Triggered immediately after receiving the ajax response.
            break;

        case "success":
            // Activated right after the HTML DOM is updated.
            break;
    }
}

You can then associate this function with a specific <f:ajax> tag like so:

<f:ajax ... onevent="someAjaxEventListener" />

To apply the event listener globally across all <f:ajax> components in the view, you can use the following method:

<h:outputScript>jsf.ajax.addOnEvent(someAjaxEventListener);</h:outputScript>

(For better organization, consider placing this code in a separate JS file loaded using <h:outputScript name>)

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