Merge branch 'MDL-43069-master' of git://github.com/danpoltawski/moodle

buitranduong · Nov 23, 2015 · 6a82d5d · 6a82d5d
2 parents b58d059 + 4dab33b
commit 6a82d5d
Showing 1 changed file with 14 additions and 11 deletions.
diff --git a/mod/assign/module.js b/mod/assign/module.js
@@ -1,19 +1,22 @@
 M.mod_assign = {};
 
 M.mod_assign.init_tree = function(Y, expand_all, htmlid) {
-    Y.use('yui2-treeview', function(Y) {
-        var tree = new Y.YUI2.widget.TreeView(htmlid);
+    var treeElement = Y.one('#'+htmlid);
+    if (treeElement) {
+        Y.use('yui2-treeview', function(Y) {
+            var tree = new Y.YUI2.widget.TreeView(htmlid);
 
-        tree.subscribe("clickEvent", function(node, event) {
-            // We want normal clicking which redirects to url.
-            return false;
-        });
+            tree.subscribe("clickEvent", function(node, event) {
+                // We want normal clicking which redirects to url.
+                return false;
+            });
 
-        if (expand_all) {
-            tree.expandAll();
-        }
-        tree.render();
-    });
+            if (expand_all) {
+                tree.expandAll();
+            }
+            tree.render();
+        });
+    }
 };
 
 M.mod_assign.init_grading_table = function(Y) {