Tan Stack Query Introduction
TanStack Query (React Query) Introduction — 2025
TanStack Query is a powerful data-fetching and state management library for React. It handles caching, background sync, refetching, and more—without the need for complex state logic.
🧠 Why Use TanStack Query?
- Caching built-in
- Automatic refetching
- Background data syncing
- Pagination & Infinite scrolling
- Devtools for debugging
- Simplifies
useEffect + useState logic
🔧 Installation
npm install @tanstack/react-query
📦 Basic Setup
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
const queryClient = new QueryClient();
function App() {
return (
);
}
🚀 Fetch Data with useQuery
import { useQuery } from '@tanstack/react-query';
import axios from 'axios';
function MyComponent() {
const { data, isLoading, error } = useQuery({
queryKey: ['users'],
queryFn: () => axios.get('https://api.example.com/users').then(res => res.data)
});
if (isLoading) return Loading...
;
if (error) return Something went wrong
;
return (
{data.map(user => (
- {user.name}
))}
);
}
✅ Features Covered in This Example
queryKey: Unique key to identify the queryqueryFn: The data-fetching function- Automatic caching and background updates
- Handles loading and error states
📘 Summary
TanStack Query is a great tool when you:
- Fetch data frequently from APIs
- Need automatic updates & syncing
- Want clean, maintainable code
Let me know if you want to continue with CRUD, Pagination, or Devtools using TanStack Query.