Data passing to js file from .env file

+// variable comes from env file: envCallback
+
 var loggedin=0;
 
 var sTransferNumber;

@@ -75,6 +75,9 @@ kstychAppObject['config']['colorInverse']='{!!$skinarr[8]!!}';
 <script src="{!!url('/')!!}/assets/components/modules/admin/chat/jquery.ui.chatbox.js"></script>
 <script src="{!!url('/')!!}/assets/components/modules/admin/chat/chatboxmanager.js"></script>
 <script src="{!!url('/')!!}/assets/js/highchart/highcharts.js"></script>
+<script>
+var envCallback = "{{ env(app_domain) }}";
+</script>
 <script src="{!!url('/')!!}/jsbody?v={!!$v!!}"></script>
 
 <?php if(Session::has('mdevice')&&Session::get('mdevice')!=""){$md=Session::get('mdevice'); ?>