update demo-fast-food-app,

03_source/mobile/src/pages/DemoFastFoodApp/module.d.ts

@@ -2,3 +2,8 @@ declare module '*.module.css' {
   const classes: { readonly [key: string]: string };
   export default classes;
 }
+
+declare module '*.module.scss' {
+  const classes: { readonly [key: string]: string };
+  export default classes;
+}

03_source/mobile/src/pages/DemoFastFoodApp/pages/Home.tsx

@@ -56,6 +56,12 @@ const Home = () => {
         <IonToolbar>
           <IonTitle>Popular</IonTitle>
 
+          {/*
+          const router = useIonRouter();
+          function handleBackClick() {
+            router.goBack();
+          }
+          */}
           <IonButtons slot="start">
             <IonButton onClick={() => handleBackClick()}>
               <IonIcon icon={chevronBackOutline} color="primary" />