first commit

common/resources/client/admin/appearance/commands/use-appearance-editor-mode.ts

@@ -0,0 +1,11 @@
+import {isSsr} from '@common/utils/dom/is-ssr';
+
+export function useAppearanceEditorMode() {
+  return {
+    isAppearanceEditorActive:
+      !isSsr() &&
+      ((window.frameElement as HTMLIFrameElement) || undefined)?.src.includes(
+        'appearanceEditor=true'
+      ),
+  };
+}