fix(core): update

ts_web/elements/wcc-properties.ts

@@ -4,7 +4,7 @@ import {
   html,
   customElement,
   TemplateResult,
-  internalProperty,
+  state,
 } from 'lit-element';
 import { WccDashboard } from './wcc-dashboard';
 
@@ -36,7 +36,7 @@ export class WccProperties extends LitElement {
   @property()
   public warning: string = null;
 
-  @internalProperty()
+  @state()
   propertyContent: TemplateResult[] = [];
 
   public render(): TemplateResult {
@@ -258,7 +258,7 @@ export class WccProperties extends LitElement {
           : 'Object';
       }
     };
-    if (this.selectedItem && !(this.selectedItem instanceof TemplateResult)) {
+    if (this.selectedItem && !((this.selectedItem as any)._classProperties)) {
       const anonItem: any = this.selectedItem;
       if (!anonItem._classProperties) {
         return html`You have selected a page!`;