forminator dynamic redirect url

Hi Amin

with a huge amount of effort I managed to come up with the names of appropriate hooks to use for pre and post submit processing. I am now at the last stage where I need to return the new data values for the fields to the front end.

My backend code writes the response, but I cannot retrieve it on the front end. I obviously have the incorrect parameters for the functions, and even the incorrect jquery parameters. Please can you assist?

My backend in functions.php is

add_filter(‘forminator_form_ajax_submit_response’, function($response_data, $form_id) {

    error_log(“✅ Hook forminator_form_ajax_submit_response FIRED for form ID: $form_id”);

    error_log(“Before modification: ” . print_r($response_data, true));

    if ($form_id == 79 && isset($GLOBALS[‘piapi_updated_values’])) {

        $response_data[‘data’][‘piapi_update’] = $GLOBALS[‘piapi_updated_values’];

        error_log(“Injected piapi_update: ” . print_r($GLOBALS[‘piapi_updated_values’], true));

    }

    error_log(“After modification: ” . print_r($response_data, true));

    return $response_data;

}, 10, 2);

My front end code is

jQuery(document).on('forminator:form:submit:success', function(event) {

    // Try to get data from originalEvent.detail or event.detail (native custom event)

    var detail = event.originalEvent?.detail || event.detail;

    console.log("🔥 Form submitted");

    console.log("📥 event detail:", detail);

    if (detail && detail.data && detail.data.piapi_update) {

        console.log("✅ piapi_update found:", detail.data.piapi_update);

        var form = event.target;

        Object.entries(detail.data.piapi_update).forEach(function([name, value]) {

            var input = form.querySelector([name="${name}"]);

            if(input) {

                input.value = value;

                console.log(🧠 Updated field ${name} to ${value});

            }

        });

    } else {

        console.warn("⚠️ No piapi_update found in AJAX response");

    }

});