Using React Router with React Query

So far, we have experienced the benefits of both React Router and React Query data fetching. React Router reduces the number of re-renders, while React Query provides a client-side cache of the data. In this section, we will use these libraries together in our app so that it has both these benefits.

Carry out the following steps:

1. Start by opening App.tsx and change the loader function on the route definition to the following:

   const router = createBrowserRouter([

     {

       path: '/',

       element: ...,

       loader: async () => {

         const existingData = queryClient.getQueryData([

           'postsData',

         ]);

         if (existingData) {

           return defer({ posts: existingData });

     ...