Refactor calendar widget changes

assets/global-shortcuts.js

@@ -17,3 +17,33 @@
         }
     });
 })();
+
+// Wire a dropdown: clicking the trigger toggles its sibling .dropdown-menu;
+// clicking outside or pressing Escape closes all wired menus. Safe to call
+// multiple times on the same trigger (no-op on re-registration).
+function wireDropdown(trigger) {
+    if (!trigger || trigger.dataset.wired) return;
+    var menu = trigger.parentElement && trigger.parentElement.querySelector('.dropdown-menu');
+    if (!menu) return;
+    trigger.dataset.wired = '1';
+    trigger.addEventListener('click', function (e) {
+        e.stopPropagation();
+        document.querySelectorAll('.dropdown-menu.is-open').forEach(function (m) {
+            if (m !== menu) m.classList.remove('is-open');
+        });
+        menu.classList.toggle('is-open');
+    });
+    menu.addEventListener('click', function () { menu.classList.remove('is-open'); });
+}
+
+document.addEventListener('click', function (e) {
+    document.querySelectorAll('.dropdown-menu.is-open').forEach(function (menu) {
+        if (!menu.parentElement.contains(e.target)) menu.classList.remove('is-open');
+    });
+});
+document.addEventListener('keydown', function (e) {
+    if (e.key !== 'Escape') return;
+    document.querySelectorAll('.dropdown-menu.is-open').forEach(function (menu) {
+        menu.classList.remove('is-open');
+    });
+});