React13 min read

React Query: Better Data Fetching

Learn React Query (TanStack Query) for better data fetching. Stop using useState and useEffect for API calls. React Query handles caching, loading states, and errors automatically.

Jessica Lee

December 18, 2025

0.0k0

If you're still using useState and useEffect for fetching data, you're doing it the hard way. React Query makes data fetching simple, fast, and reliable. Your app will feel instant because data is cached and synchronized automatically.

Why React Query?

React Query handles caching, background updates, error states, loading states, and more - all automatically. You write less code, and your app feels faster because data is cached intelligently.

Basic Usage

Getting started is super simple. Wrap your app with QueryClientProvider and use the useQuery hook. React Query handles loading, error, and success states automatically. No more manual state management for API calls.

Mutations

When you need to create, update, or delete data, use useMutation. React Query can automatically refetch related queries after mutations, keeping your UI in sync with your server.

Advanced Features

Learn about infinite queries for pagination, optimistic updates for instant UI feedback, and query invalidation for cache management. These patterns will make your app feel professional.

#React#React Query#TanStack Query#Data Fetching

Common Questions & Answers

How do I set up React Query?

Install @tanstack/react-query, create a QueryClient, wrap your app with QueryClientProvider, and use useQuery hook in components. The QueryClient manages caching and configuration.

javascript

Run Explain

import { QueryClient, QueryClientProvider, useQuery } from '@tanstack/react-query';

const queryClient = new QueryClient();

function App() {
  return (
    <QueryClientProvider client={queryClient}>
      <YourApp />
    </QueryClientProvider>
  );
}

function UserProfile({ userId }) {
  const { data, isLoading, error } = useQuery({
    queryKey: ['user', userId],
    queryFn: () => fetchUser(userId),
  });
  
  if (isLoading) return <div>Loading...</div>;
  if (error) return <div>Error!</div>;
  
  return <div>{data.name}</div>;
}

How do I handle mutations with React Query?

Use useMutation hook for create, update, and delete operations. Use onSuccess to invalidate queries, update cache optimistically, or navigate. React Query handles loading and error states automatically.