I create the header nav bar. the data of the navbar is getting dynamically.

const [navItem, setNavItem] = useState([]);
  useEffect(() => {
    fetch("https://localhost//wp-json/wp/v2/pages")
      .then((res) => res.json())
      .then((data) => {
        data.sort((a, b) => a.id - b.id);
        setNavItem(data);
      });
  }, []);

But the problem is when I refresh the page it take sometime to load the data. But I don't want this how can I solve this issue?