refactoring

docs/UIUtils.js

@@ -11,5 +11,9 @@ class UIUtils {
             chartViewElement: chartViewElement,
             canvas: chartViewElement.querySelector(".canvas")
         };
-    }    
+    }
+
+    static getSelectedOption(selectElement) {
+        return selectElement.options[selectElement.selectedIndex];
+    }
 }

docs/intensivstationen.html

@@ -27,7 +27,7 @@
       });
 
     function onKreisOptionSelected(kreisSelect, intensiveCareCapacitiesChartView, freeBedsChartView) {
-      const selectedOption = getSelectedOption(kreisSelect);
+      const selectedOption = UIUtils.getSelectedOption(kreisSelect);
       displayIntensiveCareCapacitiesChart(
         {
           intensiveCareCapacitiesChartView: intensiveCareCapacitiesChartView,
@@ -46,10 +46,6 @@
           freeBedsChartView.displayChart({ data: json.data, title: selectedOption.text });
         });
     }
-
-    function getSelectedOption(select) {
-      return select.options[select.selectedIndex];
-    }
   </script>
 </head>