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Error handling and retry logic are critical features for creating robust applications that fetch data from unreliable or slow APIs. TanStack Query simplifies managing errors and retries, providing fine-grained control to handle different failure scenarios. This tutorial will guide you through: Handling errors in queries and mutations. Configuring retry logic. Providing user-friendly feedback for errors. Step 1: Setting Up TanStack Query Install TanStack Query npm install @tanstack/react-query npm install @tanstack/react-query-devtools Setup Query Client Wrap your application with QueryClientProvider to enable query management. App.js import React from 'react'; import { QueryClient, QueryClientProvider } from '@tanstack/react-query'; import { ReactQueryDevtools } from '@tanstack/react-query-devtools'; import { UsersList } from './UsersList'; const queryClient = new QueryClient(); function App() {   return (     <QueryClientProvider client={queryClient}...

In applications where one query depends on the result of another, managing dependent queries is essential. TanStack Query provides tools to handle such scenarios with ease, ensuring efficient data fetching and proper synchronization. This tutorial will guide you through: What dependent queries are. Using the enabled option to control query execution. Examples for practical implementation. Step 1: What Are Dependent Queries? Dependent queries occur when: One query relies on the output of another query. A query should only execute when specific conditions are met (e.g., data from another query). Example Scenarios: Fetching tasks for a specific project after retrieving the project list. Loading a user's profile details after selecting a user. Step 2: Setting Up TanStack Query Install TanStack Query npm install @tanstack/react-query npm install @tanstack/react-query-devtools Setup QueryClient Wrap your application with the QueryClientProvider. App.js import React from 'react'; ...

TanStack Query makes data synchronization effortless by supporting automatic refetching and background updates. These features ensure your application always has up-to-date data, improving user experience and maintaining data consistency. In this tutorial, we will explore: How automatic refetching works. Configuring refetch intervals. Background updates on window focus and network reconnect. Practical examples for implementing these features. Step 1: Setting Up TanStack Query Install TanStack Query npm install @tanstack/react-query npm install @tanstack/react-query-devtools Set Up Query Client Wrap your app in a QueryClientProvider to enable TanStack Query. App.js import React from 'react'; import { QueryClient, QueryClientProvider } from '@tanstack/react-query'; import { ReactQueryDevtools } from '@tanstack/react-query-devtools'; import { UsersList } from './UsersList'; const queryClient = new QueryClient(); function App() {   return (     <QueryClie...

In TanStack Query, mutations are used for modifying server-side data, such as creating, updating, or deleting records. The useMutation hook simplifies the process of handling these operations and provides tools for managing loading states, errors, and cache updates. This tutorial will guide you through: Setting up mutations. Updating cache after mutations. Implementing optimistic updates. Step 1: Setting Up the Query Client Before working with mutations, initialize the QueryClient to manage queries and mutations in your app. Install TanStack Query npm install @tanstack/react-query npm install @tanstack/react-query-devtools Setup QueryClient App.js import React from 'react'; import { QueryClient, QueryClientProvider } from '@tanstack/react-query'; import { ReactQueryDevtools } from '@tanstack/react-query-devtools'; import { CreateUser } from './CreateUser'; const queryClient = new QueryClient(); function App() {   return (     <QueryClientProvider clie...

TanStack Query makes building CRUD (Create, Read, Update, Delete) operations seamless by providing tools for efficient data fetching, mutation handling, and cache management. This tutorial walks you through implementing CRUD operations in a React application using TanStack Query. Prerequisites Basic knowledge of React. A REST API endpoint for demonstration (e.g., https://jsonplaceholder.typicode.com). Install TanStack Query: npm install @tanstack/react-query npm install @tanstack/react-query-devtools Step 1: Setting Up the Query Client Before building CRUD operations, set up the QueryClient to manage queries and mutations. App.js import React from 'react'; import { QueryClient, QueryClientProvider } from '@tanstack/react-query'; import { ReactQueryDevtools } from '@tanstack/react-query-devtools'; import { Posts } from './Posts'; const queryClient = new QueryClient(); function App() {   return (     <QueryClientProvider client={queryClient}>       ...

Query keys are fundamental to how TanStack Query caches, organizes, and identifies data. They enable efficient caching, updating, and invalidation of queries, making them an essential tool for managing server state effectively. In this tutorial, you will learn: What query keys are and how they work. How to structure query keys for optimal caching. Practical examples of query key usage. Step 1: What Are Query Keys? A query key is a unique identifier for a query. It ensures that data fetched from a server is stored and retrieved correctly from the cache. Query keys can be simple strings or complex arrays. Examples: Simple key: ['users'] Key with parameters: ['user', userId] Query keys are essential because: They identify unique data sets in the cache. They enable efficient cache invalidation and refetching. Step 2: Setting Up TanStack Query Before diving into query keys, ensure your project is set up with TanStack Query. Install TanStack Query npm install @tanstack/react-...

Fetching and caching data is one of the most powerful features of TanStack Query. It simplifies handling server state by providing built-in caching, background updates, and error handling. This tutorial will guide you through fetching and caching data using TanStack Query with practical examples in React. Step 1: Install TanStack Query Install the TanStack Query library along with its development tools. npm install @tanstack/react-query npm install @tanstack/react-query-devtools Step 2: Set Up the Query Client Before fetching data, set up the QueryClient to manage all queries in your application. Example: Setting Up Query Client App.js import React from 'react'; import { QueryClient, QueryClientProvider } from '@tanstack/react-query'; import { ReactQueryDevtools } from '@tanstack/react-query-devtools'; const queryClient = new QueryClient(); function App() {   return (     <QueryClientProvider client={queryClient}>       <h1>TanStack Query Exampl...