hides moodle 4 menus in popup

js/iena.js

@@ -13,18 +13,22 @@
 			"#page-header",
 			"#page-wrapper > nav",
 			"#page-footer",
-			"#nav-drawer"
+			"#nav-drawer",
+			".drawer.drawer-left",
+			".drawer-toggles",
+			".secondary-navigation",
+			"#theme_boost-drawers-courseindex"
 			];
 			iframes=document.getElementsByClassName('iena-iframe');
 			for(var j=0; j<iframes.length; j++){
-			
-
 				iframes[j].addEventListener("load", function(e) {
 					
 					var iframe=this.contentDocument || this.contentWindow.document;
-				  	
 					for (var i = 0; i < to_hide.length; i++) {
-						iframe.querySelector(to_hide[i]).setAttribute('class', 'none-hidden');
+						if(iframe.querySelector(to_hide[i])){
+							iframe.querySelector(to_hide[i]).setAttribute('class', 'none-hidden');
+						}
+						
 					}
 					iframe.querySelector('#page').setAttribute('class', '');
 					iframe.querySelector('#page').style.margin = 0;