Initial commit.

static/js/lib/events.js

@@ -0,0 +1,10 @@
+
+export default class Events {
+    static initialiseEventHandler(selectorElement, classInitialised, eventHandler) {
+        document.querySelectorAll(selectorElement).forEach(function(element) {
+            if (element.classList.contains(classInitialised)) return;
+            element.classList.add(classInitialised);
+            eventHandler(element);
+        });
+    }
+}