turn custom fallback as function

resources/assets/src/index.tsx

@@ -22,7 +22,7 @@ function loadModules() {
         route.react as (() => Promise<{ default: React.ComponentType }>)
       )
       const Root = () => (
-        <React.Suspense fallback={route.frame ?? ''}>
+        <React.Suspense fallback={route.frame?.() ?? ''}>
           <Component />
         </React.Suspense>
       )

resources/assets/src/scripts/route.tsx

@@ -14,7 +14,7 @@ export default [
     path: 'user',
     react: () => import('../views/user/Dashboard'),
     el: '#usage-box',
-    frame: (
+    frame: () => (
       <div className="card card-primary card-outline">
         <div className="card-header">&nbsp;</div>
         <div className="card-body"></div>