Mastering useMutation — The Complete Deep Dive Guide

If useQuery is for reading server state, then useMutation is for writing to it. This guide covers everything you need to master useMutation from @tanstack/react-query. 📋 Table of Contents Installation & Setup The Big Picture Basic Usage Complete API Reference All Options Explained All Return Values Explained Optimistic Updates Advanced Patterns Error Handling useQuery vs useMutation Common Mistakes Production Best Practices ⚡ Quick Summary TL;DR: useMutation handles: ✅ POST/PUT/PATCH/DELETE operations ✅ Optimistic UI updates with rollback ✅ Automatic retry with configurable logic ✅ Smart cache invalidation ✅ Error boundary integration ✅ Lifecycle hooks (onMutate, onSuccess, onError, onSettled) Length: ~25 min read | Level: Beginner to Advanced 📦 Installation & Setup {#installation--setup} npm install @tanstack/react-query import { QueryClient , QueryClientProvider } from ' @tanstack/react-query ' const queryClient = new QueryClient () function App () { return ( < QueryClientProvider cl