Workaround script to provide event information for thank you pages and autoresponses.

event_info_downstream.html

<!-- BEGIN Additional fields for event autoresponses.  -->
<?
    // Script to retrieve the `event` record for an event registration.
    // * The script only runs on event pages and event checkout pages.  Nothing happens for other page types.
    // * The script needs must be placed just before the end of the `body` tag in the template.
    // * Javascript can access the stored data using `#eventDetails`.
    //
    // @see https://help.salsalabs.com/hc/en-us/articles/115000040193-Additional-merge-fields-for-event-autoresponses
    //
    var event = "null";
    (function() {
        var urlFlag = 'event/common/public';
        if (Request.getURI().indexOf(urlFlag) == -1) { return; }
        var eventKey = Request.getParameter('event_KEY');
        if (eventKey == null) { return; }
        var record = DB.getObject('event', eventKey);
        if (record == null) { return; }
    ?>
    <div id="eventDetails">
        <?
            var fields = "Event_Name,Location_Common_Name,Address,City,State,Zip,Country,Directions,Start,End".split(',');
            var needPrefix = 'City,State,Country,Zip'.split(',');
            eval(Crawler.get('https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.min.js'));
            for (key in record) {
                if (fields.indexOf(key) != -1) {
                    var value = record[key];
                    if (key == 'Start' || key == 'End') {
                        value = moment(record[key]).format('MMMM D, YYYY [at] h:mm a');
                    }
                    if (needPrefix.indexOf(key) != -1) {
                        key = 'Event_' + key;
                    }
        ?><input type="hidden" name="<?= key ?>" value="<?= value ?>">
        <?
                    }
                }
        ?>
    </div>
    <script type="text/javascript">
        // Script to update the event details with the total amount, then append them
        // to the form.  That will make all of the detail information available for 
        // an autoresponse.
        $(document).ready(function () {
            var amount = $('td.salsaCartAmount strong big');
            if (amount.length != 0) {
                amount = amount.eq(0).html().replace('$', '');
                $('#eventDetails').append('<input type="hidden" name="Event_Amount" value="' + amount + '">');
                $('#eventDetails').append('<input type="hidden" name="payment_type" value="creditCard">');
            }
            $('.salsa form').append($('#eventDetails'));
        })
        // Script to update the details payment type.  You can use this in a conditional
        // send to discriminate between invoiced attendees and ones whose fees were paid
        // with a credit card.
        $(document).ready(function () {
            $("#invoiceRadio").click(function () {
                $("#credit_card_information").hide();
                $("#Status").val("Invoiced");
                $('input[name="payment_type"]').val('invoice');
            });
            $("#ccRadio").click(function () {
                $("#credit_card_information").show();
                $("#Status").val("");
                $('input[name="payment_type"]').val('creditCard');
            });
        });
    </script>
<?
    })();
?>
<!-- END Additional fields for event autoresponses.  -->