Got a basic calendar editing page going.

cal/index.js

@@ -0,0 +1,17 @@
+Vue.createApp({
+  data: function() {
+          return { 'events': null
+                 , 'tabs': [ 'Events', 'Create' ]
+                 , 'frm': { 'tab': 0, 'e': null }
+                 }
+        },
+  mounted: function() {
+             var app = this;
+             jQuery.get( 'api.php'
+                       , { 'cmd': 'get' }
+                       , function(data) {
+                           app.events = data;
+                         }
+                       );
+           }
+}).mount('#app')