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46 guides

React

Hooks, performance, architecture, state management and component design — practical React guides for UI developers who ship production apps.

Pillar guide
React Architecture & Patterns: The Complete 2026 Guide
Everything you need to architect scalable React apps in 2026 — component patterns, state strategies, performance, TypeScript, and real code you can ship today.
Read the complete guide → 15 min
React architecture diagram showing component tree, state flow, and module boundaries
All 46 guides
Developer writing React component code on a laptop screen
8 min read
Render Props in React 2026: Dead Pattern or Still Useful?
Render props aren't dead — but they're not your first choice anymore either. Here's when the pattern still earns its keep in 2026 React codebases.
render propsreact
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developer writing React code on dark monitor with purple glow
8 min read
Optimistic Updates in React: useOptimistic and the Pattern That Works
Learn how to implement optimistic updates in React using useOptimistic, manual rollback patterns, and mutation strategies that actually hold up in production.
optimistic updatesreact
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Developer writing React component code on a dark theme editor
8 min read
React Compound Components Pattern: Flexible APIs Without Prop Hell
Stop drowning in prop hell. Learn the compound components pattern in React — build flexible, composable APIs that your teammates will actually want to use.
compound componentsreact
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Developer coding a React accessibility component on a laptop screen
8 min read
React Aria Components: Headless UI Done Right by Adobe
React Aria Components from Adobe gives you fully accessible, headless UI primitives for React — here's how to actually use them and when to pick them over alternatives.
react ariaheadless ui
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Developer writing Next.js code on a dark theme code editor
8 min read
Next.js App Router vs Pages Router in 2026: Which Should You Use?
App Router or Pages Router? In 2026, the answer isn't obvious. Here's an honest, opinionated breakdown to help you pick the right Next.js architecture.
next.jsapp router
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code editor showing React component code on a dark screen
9 min read
Storybook 8 with React: Setup, Stories and Visual Testing
Set up Storybook 8 with React from scratch, write Component Story Format 3 stories, and run visual regression tests — a practical guide for component library authors.
storybookreact
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Code editor showing React component tree with portal overlay on dark background
8 min read
React Portals: Modals, Tooltips and Dropdowns That Break Out of DOM
React portals let modals, tooltips and dropdowns escape overflow:hidden and z-index traps. Here's how to build them correctly without the usual gotchas.
react portalsmodal
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developer looking at code on monitor with error output visible
8 min read
React Error Boundaries: Catching Crashes Without Losing Your Mind
React error boundaries stop one bad component from taking down your whole app. Here's how to write them, place them, and build fallback UIs that don't embarrass you.
error boundaryreact
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developer writing code on laptop with multiple test files open
8 min read
React Testing in 2026: Vitest, Testing Library and What to Actually Test
Vitest has overtaken Jest in the React ecosystem. Here's what changed, why Testing Library still dominates, and which tests actually matter in 2026.
react testingvitest
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Developer examining React component code on a laptop screen
9 min read
React.memo, useMemo and useCallback: The Honest Guide to When You Need Them
Stop spraying React.memo everywhere. Here's when useMemo, useCallback, and memo actually help — and when they silently make things slower.
react memouseMemo
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Dark code editor showing Next.js loading state component code
8 min read
Next.js loading.tsx: Streaming, Suspense and Skeleton Loading States
Master Next.js 14+ loading.tsx, React Suspense, and skeleton UI patterns. Stream data, avoid layout shift, and build loading states users won't hate.
next.jsloading ui
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developer writing Next.js middleware code on a laptop at a desk
8 min read
Next.js Middleware: Auth, Redirects, A/B Testing — The Real Use Cases
Next.js Middleware runs at the edge before your page loads. Here's how to actually use it for auth, redirects, and A/B testing — with real code examples.
next.js middlewareauth
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Code editor screen showing JavaScript React code with colorful syntax highlighting
8 min read
React Concurrent Rendering: useTransition, useDeferredValue Explained
Learn how React's useTransition and useDeferredValue hooks fix janky UIs by letting you control rendering priority — with real code examples you can ship today.
concurrentreact
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developer looking at server performance graphs on multiple monitors
8 min read
Next.js Caching in 2026: fetch, ISR, Dynamic and No-Store Explained
Next.js caching is confusing — fetch defaults, ISR revalidation, dynamic rendering, and no-store all interact. Here's exactly how each layer works in 2026.
next.jscaching
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developer coding React animation on a dark monitor screen
8 min read
react-spring: Physics-Based Animations Without the Complexity
react-spring gives you spring physics animations in React without the math. Here's how to use useSpring, useTrail, and useTransition to build buttery UI motion.
react-springanimation
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Developer coding React state management on a laptop screen at night
8 min read
Zustand in React: Simple State Management That Gets Out of Your Way
Zustand is the React state management library that's actually fun to use. No boilerplate, no providers — just a hook and a store. Here's everything you need.
zustandreact
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Abstract code navigation arrows on a dark terminal screen background
9 min read
React Router v7: What Changed, What Broke and What to Migrate
React Router v7 ships framework-mode routing, flattened loaders, and dropped legacy APIs. Here's what actually broke and how to migrate without losing your mind.
react router v7routing
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Developer writing React code on a laptop screen in dark mode
8 min read
TanStack Query v5 in React: Data Fetching That Actually Scales
TanStack Query v5 changes how React apps handle server state. Here's a practical guide to queries, mutations, caching, and patterns that hold up in production.
tanstack queryreact query
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Developer writing Next.js server-side code on a dark-themed monitor
8 min read
Next.js Server Actions in 2026: Forms, Mutations and the Right Patterns
Server Actions matured fast. Here's how forms, mutations, and optimistic updates actually work in Next.js 15+ — with patterns that don't fall apart under real traffic.
server actionsnext.js
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Code editor showing a React data table component with rows and columns
8 min read
TanStack Table in React: Sorting, Filtering, Pagination in 100 Lines
Build a fully-featured React data table with TanStack Table v8 — sorting, filtering, and pagination — in under 100 lines of real, production-ready code.
react tabletanstack table
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Code editor showing React hooks and data fetching patterns on screen
8 min read
React use() Hook: Data Fetching in Server and Client Components
React's use() hook lands in React 19 and changes how you fetch data in both server and client components. Here's what it does, where it helps, and where it doesn't.
react usehook
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Code on a monitor screen showing JavaScript React component syntax
8 min read
React 19 Compiler: What It Does, What It Fixes and What to Expect
React 19's compiler auto-memoizes your components so you don't have to. Here's what it actually changes, what it still can't fix, and how to adopt it without pain.
react 19react compiler
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Developer writing Next.js code on a laptop with dark theme editor
8 min read
Next.js Metadata API: The Right Way to Handle SEO in App Router
Stop hacking document.head — Next.js 13+ Metadata API handles Open Graph, Twitter Cards, and canonical URLs the right way. Here's the full breakdown.
next.jsmetadata
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Developer writing React code on a laptop with dark theme editor open
8 min read
React Suspense in 2026: Boundaries, Streaming and What Still Breaks
React Suspense has matured a lot by 2026, but streaming SSR and nested boundaries still bite developers. Here's what actually works and what doesn't.
react suspensestreaming
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developer reviewing image optimisation code on a laptop screen
9 min read
Next.js Image Optimisation: next/image Deep Dive — Every Prop Explained
Every prop in next/image explained with real code — from lazy loading and LCP priority to blur placeholders, remote patterns, and responsive sizes.
next.jsimage
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Developer writing React state management code on a dark monitor screen
8 min read
React Context vs Zustand vs Jotai: State Management in 2026
Context, Zustand, or Jotai — picking the wrong one costs you re-renders and refactors. Here's how to choose in 2026 without overthinking it.
react statecontext
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Developer coding React app on laptop screen with dark theme
8 min read
Infinite Scroll in React: Intersection Observer vs React Query
Pick the wrong infinite scroll approach in React and you'll pay for it in jank and memory leaks. Here's how Intersection Observer and React Query compare — and when to use each.
react infinite scrollintersection observer
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Developer writing Next.js code on a laptop in a dark workspace
8 min read
Next.js App Router in 2026: What's Changed and What Still Trips People Up
Next.js App Router has matured significantly since 2023, but plenty of gotchas remain. Here's what's actually changed and where devs still get burned.
next.jsapp router
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Developer writing React code on a laptop with a dark editor theme
8 min read
useMemo vs useCallback: When to Use Each (and When to Skip Both)
useMemo and useCallback aren't free — they have overhead. Learn exactly when each hook earns its keep, and when you're just adding complexity for nothing.
react hooksuseMemo
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Developer writing accessible React code on a dark monitor screen
8 min read
React Accessibility (a11y): The 8 Patterns You Keep Getting Wrong
Stop shipping inaccessible React apps. Here are the 8 a11y patterns developers get wrong most often — with fixes you can apply today.
accessibilityaria
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Developer writing React code on a dark-themed monitor setup
8 min read
React Server Components Explained: What They Are and Why They Matter
React Server Components let you run React code on the server without shipping JS to the browser. Here's what that actually means for your Next.js app in 2026.
react server componentsnext.js
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Code editor screen showing React JavaScript hooks and functions
8 min read
15 Custom React Hooks That Will Save You Hundreds of Lines
15 custom React hooks that eliminate repetitive boilerplate — from local storage sync to debounced inputs, with working code you can drop in today.
custom hooksreact
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Developer coding React list virtualization on a dark monitor setup
8 min read
Virtualizing Long Lists in React: TanStack Virtual Deep Dive
Rendering 10,000 rows in React will tank your FPS. Here's how TanStack Virtual fixes it — with real code and zero hand-waving about "performance gains".
react virtualizationlong lists
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developer writing React code on a dark terminal screen
8 min read
React Hooks in 2026: A Complete Guide with Real-World Examples
React Hooks have reshaped how we build components since 2019. Here's the complete 2026 guide with real patterns, pitfalls, and working code examples.
react hooksuseState
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Code editor screen showing colorful React animation component code
8 min read
Framer Motion in React: Animations That Feel Alive
Framer Motion gives React animations a physics-based feel that CSS transitions can't match. Here's how to actually use it without overcomplicating your components.
framer motionreact animation
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Developer typing React TypeScript code on a laptop screen
8 min read
React + TypeScript in 2026: 12 Patterns Senior Devs Swear By
The React + TypeScript patterns that actually matter in 2026 — from discriminated unions to satisfies, 12 techniques senior devs reach for every day.
reacttypescript
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Developer writing React code on a dark theme code editor
8 min read
React Lazy Loading: Code Splitting, Suspense and the Right Way
React lazy loading with code splitting and Suspense cuts your initial bundle size dramatically. Here's the practical guide to doing it right without breaking your app.
react lazycode splitting
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Dark code editor screen with React component code on monitor
8 min read
Implementing Dark Mode in React: CSS Variables, Tailwind, System Preference
Learn how to implement dark mode in React using CSS variables, Tailwind's dark class, and the prefers-color-scheme API — with no flash on reload.
dark modereact
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Code editor screen showing JavaScript React component development
8 min read
React 19: What Actually Changed and What You Should Use Now
React 19 shipped the compiler, Actions API, and a pile of hook changes. Here's what's actually worth adopting in 2026 and what you can skip.
react 19new features
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Developer typing React form code on a modern laptop screen
8 min read
React Hook Form + Zod: The Form Stack That Finally Makes Sense
React Hook Form and Zod together cut form boilerplate in half and give you runtime-safe validation without the usual pain. Here's how to wire them up properly.
react hook formzod
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Developer analyzing React performance metrics on multiple monitors
8 min read
React Performance in 2026: The 9 Optimizations That Actually Work
Stop guessing where your React app is slow. These 9 battle-tested optimizations — from memo to Suspense — are the ones that actually move the needle in 2026.
react performancememo
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developer building React toast notification UI on laptop screen
8 min read
React Toast Notifications: Build a Sonner-Style Toast System
Learn how to build a Sonner-style React toast notification system from scratch — stacked, animated, and fully accessible without a heavy dependency.
toastnotifications
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Developer coding drag and drop React UI on a laptop screen
8 min read
Drag and Drop in React 2026: dnd-kit vs react-beautiful-dnd
dnd-kit or react-beautiful-dnd? In 2026 one is actively maintained and one isn't. Here's the honest breakdown to help you pick the right library.
drag dropreact
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MCP UI AI agents interface
6 min read
What Is MCP? Using Empire UI MCP for AI-Native UI Components
Learn what MCP is and how Empire UI's MCP server lets you generate production-ready mcp ui components directly from any AI assistant in seconds.
mcpai components
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dark light mode theme toggle React
6 min read
How to Build a Theme Toggle in React + Tailwind (Dark Mode)
Learn how to build a polished theme toggle in React and Tailwind CSS to add seamless dark mode switching to any modern web application.
theme toggledark mode
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