una/modules/boonex/stream/template/stream_viewers.html

<div id="bx-stream-viewers-__suffix__" class="bx-stream-viewers">__viewers__</div>
<script>
    var fFunc = function () {
        let playerInstance = typeof(OvenPlayer) === 'undefined' ? false : OvenPlayer.getPlayerByContainerId("bx-stream-player-__suffix__");
        if ((!playerInstance || 'playing' == playerInstance.getState() || 'idle' == playerInstance.getState()) && ('undefined' !== typeof(document.hidden) && !document.hidden)) {
            $.getJSON('__url__', function (oData) {
                if ('undefined' !== typeof(oData.viewers)) {
                    $('#bx-stream-viewers-__suffix__').html(oData.viewers);
                }
                if ('undefined' !== typeof(oData.num) && false !== oData.num) {
                    $('#bx-stream-processing').hide();
                    $('.bx-stream-badge').show();
                }
                if ('undefined' !== typeof(oData.num) && false === oData.num) {
                    $('.bx-stream-badge').hide();
                }
            }).always(function() {
                setTimeout(fFunc, 3000);
            });
        }
        else {
            setTimeout(fFunc, 3000);
        }
    }
    fFunc();
</script>