From 5844dffc61a6379e70d5a141c36a900b2e9b9eaa Mon Sep 17 00:00:00 2001
From: Alexander Killing <killing@leifos.de>
Date: Fri, 22 Apr 2022 17:34:48 +0200
Subject: [PATCH] fixed bug #32128: Accordeon -vertical does not react after
 opening one panel

---
 Modules/Scorm2004/scripts/questions/question_handling.js    | 2 +-
 .../tpl.il_as_tst_man_scoring_by_question_tblrow.html       | 4 ++--
 Services/Accordion/js/accordion.js                          | 2 +-
 Services/COPage/templates/default/tpl.question_export.html  | 6 +++---
 Services/JavaScript/js/Basic.js                             | 2 +-
 5 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Modules/Scorm2004/scripts/questions/question_handling.js b/Modules/Scorm2004/scripts/questions/question_handling.js
index 5cca88a86e9a..64fa2dc5d48e 100644
--- a/Modules/Scorm2004/scripts/questions/question_handling.js
+++ b/Modules/Scorm2004/scripts/questions/question_handling.js
@@ -942,7 +942,7 @@ ilias.questions.showFeedback = function(a_id) {
 	const el = document.getElementById('feedback' + a_id);
 	if (el) {
 		el.style.display = '';
-		if (typeof MathJax != "undefined") {
+		if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
 			MathJax.Hub.Queue(["Typeset",MathJax.Hub, el]);
 		}
 	}
diff --git a/Modules/Test/templates/default/tpl.il_as_tst_man_scoring_by_question_tblrow.html b/Modules/Test/templates/default/tpl.il_as_tst_man_scoring_by_question_tblrow.html
index 174a251af681..d487b92cbc79 100644
--- a/Modules/Test/templates/default/tpl.il_as_tst_man_scoring_by_question_tblrow.html
+++ b/Modules/Test/templates/default/tpl.il_as_tst_man_scoring_by_question_tblrow.html
@@ -37,8 +37,8 @@
 
 										$this.data("modal", modal);
 
-										if (typeof MathJax != "undefined") {
-											MathJax.Hub.Queue(["Typeset", MathJax.Hub]);
+										if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
+                                            MathJax.Hub.Queue(["Typeset", MathJax.Hub]);
 										}
 
 										modal.show();
diff --git a/Services/Accordion/js/accordion.js b/Services/Accordion/js/accordion.js
index 6281bc3cd424..0e9eec59021b 100644
--- a/Services/Accordion/js/accordion.js
+++ b/Services/Accordion/js/accordion.js
@@ -470,7 +470,7 @@ il.Accordion = {
 	rerenderContent: function(acc_el) {
 
 		// rerender mathjax
-		if (typeof MathJax != "undefined") {
+		if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
 			MathJax.Hub.Queue(["Reprocess",MathJax.Hub, acc_el[0]]);
 		}
 		// see http://docs.mathjax.org/en/latest/typeset.html
diff --git a/Services/COPage/templates/default/tpl.question_export.html b/Services/COPage/templates/default/tpl.question_export.html
index b6e0f3e07892..5b589f4806c8 100644
--- a/Services/COPage/templates/default/tpl.question_export.html
+++ b/Services/COPage/templates/default/tpl.question_export.html
@@ -19,7 +19,7 @@
 		jQuery('div#container{VAL_ID}').autoRender(questions[{VAL_ID}]);
 		{HANDLE_IMAGES}
 
-		if (typeof MathJax != "undefined") {
+		if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
 			MathJax.Hub.Queue(["Typeset",MathJax.Hub, "container{VAL_ID}"]);
 		}
 	}
@@ -54,7 +54,7 @@
 
 	question.init();
 
-	if (typeof MathJax != "undefined") {
+	if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
 		MathJax.Hub.Queue(["Typeset", MathJax.Hub, "container{VAL_ID}"]);
 	}
 };
@@ -303,7 +303,7 @@
 
 					questionData.engineInstance = question;
 
-					if (typeof MathJax != "undefined") {
+					if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
 						MathJax.Hub.Queue(["Typeset", MathJax.Hub, "container{VAL_ID}"]);
 					}
 				}
diff --git a/Services/JavaScript/js/Basic.js b/Services/JavaScript/js/Basic.js
index c867130f9504..c4691e35e3b8 100644
--- a/Services/JavaScript/js/Basic.js
+++ b/Services/JavaScript/js/Basic.js
@@ -271,7 +271,7 @@ il.Util = {
 	 */
 	print: function () {
 		if (typeof(window.print) != 'undefined') {
-			if (typeof MathJax !== 'undefined') {
+			if (typeof MathJax != "undefined" && typeof MathJax.Hub != "undefined") {
 				MathJax.Hub.Queue(
 					["Delay",MathJax.Callback,700],
 					window.print