Is it possible to re-render a component after updating cache with React Query?

Yes, components can re-render after updating the cache with React Query.

React Query is a powerful library for managing server state in React applications, primarily optimizing data fetching and updates through caching. When using React Query's data fetching or mutation operations, related components automatically re-render based on the cached data state.

For example, if you use the useQuery hook from React Query to fetch data, the hook first checks for the corresponding data in the cache. If found, it provides the data directly from the cache; otherwise, it fetches data from the server and updates the cache. Once the cache is updated, all components using this data automatically fetch the latest cached data and re-render.

Additionally, the useMutation hook from React Query can handle mutation operations such as POST, PUT, or DELETE. After these operations succeed, you can configure the mutation to update or invalidate related queries, prompting associated components to re-render based on the latest cached data. For example:

javascript
const { mutate } = useMutation(addTodo, {
  onSuccess: () => {
    queryClient.invalidateQueries('todos')
  },
});

function handleAddTodo(todo) {
  mutate(todo);
}

In the above example, after successfully adding a todo item, calling invalidateQueries for the 'todos' query triggers a new request to fetch the latest todo list and update the cache. All components using this cached data will re-render with the new content.

In summary, React Query enables convenient management of data caching, ensuring components promptly respond to data updates by re-rendering to display the latest information.