1 files changed, 4 insertions, 0 deletions
diff --git a/js/codeq/hint.js b/js/codeq/hint.js
index 641c710..b8cf03b 100644
--- a/js/codeq/hint.js
+++ b/js/codeq/hint.js
@@ -440,6 +440,10 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
 
                         });
                         jqHintBox.append(jqHintBtn);
+
+                        // experiment: Prolog hints
+                        activityHandler.queueTrace({'typ': 'experiment', 'data': 'hint button shown'});
+                        // end of experiment: Prolog hints
                     }
                 }
                 jqHints.prepend(jqHintBox);