diff --git a/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab1.jsx b/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab1.jsx
index f107663..d1d807c 100644
--- a/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab1.jsx
+++ b/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab1.jsx
@@ -24,7 +24,7 @@ import { getFavourites, getSearchCount } from '../store/Selectors';
 
 const Tab1 = () => {
   const router = useIonRouter();
-  const pageRef = useRef();
+  const pageRef = useRef(null);
   const favourites = useStoreState(WordStore, getFavourites);
   const searchCount = useStoreState(WordStore, getSearchCount);
 
diff --git a/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab2.jsx b/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab2.jsx
index d3a8909..bb59c51 100644
--- a/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab2.jsx
+++ b/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab2.jsx
@@ -17,7 +17,7 @@ import { WordStore } from '../store';
 import { searchWord } from '../utils';
 
 const Tab2 = () => {
-  const pageRef = useRef();
+  const pageRef = useRef(null);
   const [searchTerm, setSearchTerm] = useState('');
   const [searchResult, setSearchResult] = useState(false);
   const [animatedClass, setAnimatedClass] = useState('');
diff --git a/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab3.jsx b/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab3.jsx
index d12efc2..7d8298f 100644
--- a/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab3.jsx
+++ b/03_source/mobile/src/pages/DemoDictionaryApp/AppPages/Tab3.jsx
@@ -7,7 +7,7 @@ import { WordStore } from '../store';
 import { getFavourites } from '../store/Selectors';
 
 const Tab3 = () => {
-  const pageRef = useRef();
+  const pageRef = useRef(null);
   const favourites = useStoreState(WordStore, getFavourites);
   const [animatedClass, setAnimatedClass] = useState('animate__slideInLeft');