React Roadmap
22 sections • 380 topics
- 1. Functional Components and Arrow Functions
- Example: Component declaration patterns
- 2. JSX Elements and Expression Embedding (curly braces)
- Example: JSX expressions and embedding
- 3. Component Props and Destructuring
- Example: Props destructuring patterns
- 4. Children Prop and Component Composition
- Example: Children and composition patterns
- 5. Conditional Rendering Patterns (&&, ternary, if-else)
- Example: Conditional rendering techniques
- 6. JSX Fragment (
- Example: Fragment usage patterns
- 1. useState Hook and State Management
- Example: useState patterns and updates
- 2. useEffect Hook and Side Effects (lifecycle methods)
- Example: useEffect patterns and cleanup
- 3. useContext Hook for Context API
- Example: Context creation and consumption
- 4. useReducer Hook for Complex State Logic
- Example: useReducer for complex state management
- 5. useMemo and useCallback for Performance Optimization
- Example: useMemo and useCallback optimization
- 6. useRef Hook for DOM Access and Mutable Values
- Example: useRef for DOM access and mutable values
- 1. useTransition Hook for Non-blocking Updates
- Example: useTransition for responsive filtering
- 2. useDeferredValue Hook for Deferred Values
- Example: useDeferredValue for responsive search
- 3. useId Hook for Unique Identifiers
- Example: useId for accessible form fields
- 4. useSyncExternalStore Hook for External State
- Example: useSyncExternalStore for browser APIs
- 5. useInsertionEffect Hook for CSS-in-JS Libraries
- Example: useInsertionEffect for style injection
- 6. Concurrent Features and Automatic Batching
- Example: Automatic batching in React 18
- React 18 Key Improvements
- 1. Local Component State (useState, useReducer)
- Example: Choosing between useState and useReducer
- 2. State Lifting and Sharing State Between Components
- Example: State lifting patterns
- 3. State Colocation and Component Responsibility
- Example: State colocation best practices
- 4. Derived State and Computed Values (useMemo)
- Example: Derived state patterns
- 5. State Normalization for Complex Data Structures
- Example: State normalization patterns (Part 1/2)
- Example: State normalization patterns (Part 2/2)
- 6. State Machines Pattern with useReducer
- Example: State machine patterns with useReducer (Part 1/2)
- Example: State machine patterns with useReducer (Part 2/2)
- State Management Decision Guide
- 1. createContext and Provider Pattern
- Example: Creating and providing context
- 2. useContext Hook and Consuming Context
- Example: Consuming context with custom hooks
- 3. Multiple Contexts and Context Composition Patterns
- Example: Multiple contexts and composition
- 4. Context Performance and Re-render Optimization
- Example: Context performance optimization
- 5. Context API vs Prop Drilling - When to Use
- Example: Comparing approaches
- 6. Custom Context Hooks Pattern
- Example: Custom context hooks and abstractions
- Context API Best Practices
- 1. Controlled Components and Input State (value, onChange)
- Example: Controlled component patterns
- 2. Uncontrolled Components with useRef and defaultValue
- Example: Uncontrolled components with useRef
- 3. Form Validation and Error Handling Patterns
- Example: Form validation patterns
- 4. Custom Input Components and Form Hooks
- Example: Custom input components and hooks
- 5. Form Libraries (Formik, React Hook Form, Zod)
- Example: Formik and React Hook Form
- 6. File Upload and FormData Handling
- Example: File upload and FormData
- Forms Best Practices
- 1. Event Handler Syntax and Event Objects (e.target, e.preventDefault)
- Example: Event handler patterns
- 2. Synthetic Events and Cross-browser Compatibility
- Example: Synthetic events and cross-browser handling
- 3. Event Handler Binding and Performance Optimization
- Example: Event handler optimization
- 4. Custom Event Handlers and Event Composition
- Example: Custom event handlers
- 5. Keyboard and Mouse Events (onKeyDown, onMouseEnter)
- Example: Keyboard and mouse events
- 6. Touch Events and Mobile Interactions (onTouchStart)
- Example: Touch events and mobile gestures
- Event Handling Best Practices
- 1. Array Rendering with map() Method
- Example: Basic list rendering patterns
- 2. Key Prop Best Practices and Unique IDs
- Example: Key prop patterns and anti-patterns
- 3. Dynamic List Updates and State Management
- Example: Dynamic list operations with immutable state
- 4. Conditional List Rendering Patterns
- Example: Conditional rendering patterns
- 5. List Filtering and Search Implementation
- Example: Search and filter implementations
- 6. Virtualized Lists (react-window, react-virtualized)
- Example: Virtualized list with react-window
- Lists and Rendering Best Practices
- 1. useEffect Patterns and Dependency Array
- Example: useEffect dependency patterns
- 2. Effect Cleanup Functions and Memory Leak Prevention
- Example: Effect cleanup patterns
- 3. useLayoutEffect vs useEffect - When to Use Which
- Example: useEffect vs useLayoutEffect timing
- 4. Data Fetching with useEffect and Async Functions
- Example: Data fetching patterns
- 5. Custom Hooks for Reusable Effect Logic
- Example: Reusable custom hooks
- 6. Effect Performance Optimization and Dependencies
- Example: Effect performance optimizations
- Effect Best Practices Checklist
- 1. React.memo for Component Memoization
- Example: React.memo usage patterns
- 2. useMemo Hook for Expensive Calculations
- Example: useMemo patterns
- 3. useCallback Hook for Function Memoization
- Example: useCallback patterns
- 4. Code Splitting with React.lazy and Suspense
- Example: Code splitting patterns
- 5. Bundle Size Analysis and Optimization
- Example: Bundle optimization techniques
- 6. Re-render Optimization and React Profiler
- Example: Debugging and fixing re-renders
- Performance Optimization Checklist
- 1. Error Boundary Class Components
- Example: Error boundary implementation
- 2. componentDidCatch and getDerivedStateFromError Lifecycle
- Example: Using both lifecycle methods
- 3. useErrorHandler Hook Patterns (react-error-boundary)
- Example: useErrorHandler custom hook
- 4. Async Error Handling and Promise Rejections
- Example: Async error handling patterns
- 5. Error Reporting and Monitoring (Sentry)
- Example: Error monitoring integration
- 6. Fallback UI and Error Recovery Components
- Example: Fallback UI and recovery patterns
- Error Handling Best Practices
- 1. useRef Hook for DOM Access and Mutable Values
- Example: Basic DOM Element Access
- Example: Multiple Refs with Array
- Example: Storing Mutable Values
- 2. forwardRef API and Ref Forwarding Pattern
- Example: Basic Ref Forwarding
- Example: Styled Component with Ref Forwarding
- Example: Combining Own Ref with Forwarded Ref
- Example: TypeScript Ref Forwarding
- 3. useImperativeHandle Hook for Custom Ref APIs
- Example: Custom Input with Imperative Methods
- Example: Modal Component with Imperative API
- Example: Video Player with Imperative Controls
- 4. Focus Management and Accessibility (a11y)
- Example: Auto Focus on Mount
- Example: Focus Trap in Modal
- Example: Skip Navigation Link
- Example: Focus Management in Dynamic Lists
- 5. DOM Measurements and Element Properties
- Example: Measuring Element Dimensions
- Example: Scroll Position Tracking
- Example: Intersection Observer with Refs
- Example: ResizeObserver for Responsive Components
- 6. Third-party Library Integration with Refs
- Example: D3.js Chart Integration
- Example: Leaflet Map Integration
- Example: Monaco Editor Integration
- Example: jQuery Plugin Wrapper
- Refs and DOM Manipulation Best Practices
- 1. Higher-Order Components (HOC) Pattern
- Example: Basic HOC with authentication
- Example: Props transformation and composition
- 2. Render Props and Function-as-Children Pattern
- Example: Mouse tracker with render prop
- Example: Modern hook alternative (preferred)
- 3. Compound Components Pattern and Component APIs
- Example: Tabs compound component with context
- Example: Controlled compound component
- 4. Custom Hooks Pattern for Logic Reuse
- Example: Custom hooks for common patterns
- Example: Data fetching and debounce hooks
- 5. Polymorphic Components and Generic TypeScript Props
- Example: Polymorphic Box component
- Example: Generic list component
- 6. Component Composition vs Inheritance - React Philosophy
- Example: Composition patterns (preferred)
- Example: Why composition beats inheritance
- Advanced Component Patterns Best Practices
- 1. Suspense Component for Code Splitting (React.lazy)
- Example: Basic code splitting with Suspense
- Example: Nested Suspense boundaries for granular loading
- 2. Suspense for Data Fetching and Async Operations
- Example: Suspense with React Query
- Example: use() hook for Suspense data fetching (React 19)
- 3. Error Boundaries with Suspense Fallbacks
- Example: Error Boundary with Suspense integration
- Example: Reusable boundary component
- 4. Concurrent Rendering and Time Slicing (React 18+)
- Example: Concurrent rendering with createRoot
- Example: Visualizing concurrent rendering benefits
- 5. useTransition Hook for Non-blocking State Transitions
- Example: useTransition for responsive search
- Example: Tab switching with transitions
- Example: Pagination with transitions
- 6. Server Suspense and Streaming SSR (Server-Side Rendering)
- Example: Node.js streaming SSR setup
- Example: Next.js Server Components with Suspense
- Example: Selective hydration benefits
- Suspense and Concurrent Features Best Practices
- 1. createPortal API for Modals and Overlays
- Example: Basic portal setup
- Example: Dynamic portal container
- 2. Modal Components with Portal Pattern
- Example: Full-featured modal with portal
- Example: Modal with animation
- 3. Tooltip and Overlay Positioning with Portals
- Example: Basic tooltip with positioning
- Example: Advanced positioning with Floating UI
- 4. Event Bubbling Behavior with Portals
- Example: Event bubbling demonstration
- Example: Context access in portals
- 5. Accessibility (ARIA) with Portal Components
- Example: Accessible modal with full ARIA support
- Example: Accessible tooltip
- 6. Multiple Portal Management and Z-index
- Example: Portal manager with context
- Example: Modal queue system
- Portals and DOM Rendering Best Practices
- 1. React Server Components (RSC) Fundamentals and Architecture
- Example: Server Component basics
- Example: Client Component with 'use client'
- 2. Client vs Server Component Boundaries and 'use client'
- Example: Component composition patterns
- Example: Serializable props requirement
- 3. Data Fetching in Server Components (async/await)
- Example: Data fetching patterns
- Example: Streaming with Suspense
- Example: Server-only code protection
- 4. Server Component Performance Benefits and Zero JS
- Example: Bundle size comparison
- Example: Performance optimization strategies
- 5. Hydration and Client-side State Management
- Example: State management patterns
- Example: Context providers in Client Components
- Example: Avoiding hydration mismatches
- 6. Next.js App Router and RSC Integration
- Example: Next.js App Router file structure
- Example: Dynamic routes and data fetching
- Example: Route handlers (API routes)
- Server Components and Full-Stack React Best Practices
- 1. React Testing Library (RTL) Best Practices
- Example: Basic RTL test with best practices
- Example: Query priority guide
- 2. Component Testing and User Interactions (fireEvent, userEvent)
- Example: Testing form with validation
- Example: Testing async data fetching
- 3. Hook Testing with renderHook API
- Example: Testing custom hook with state
- Example: Testing async hook with API calls
- Example: Testing hook with context
- 4. Mocking Components, Props, and API Calls
- Example: Mocking API calls
- Example: Mocking child components
- Example: Using Mock Service Worker (MSW)
- Example: Testing with fake timers
- 5. Integration Testing with React Router and Context
- Example: Testing navigation and routes
- Example: Testing dynamic routes with params
- Example: Testing protected routes
- 6. End-to-End Testing (Cypress, Playwright, Vitest)
- Example: Cypress E2E test
- Example: Cypress custom commands
- Example: Playwright E2E test
- Example: Playwright with fixtures and page objects
- React Testing Best Practices Summary
- 1. React DevTools Browser Extension (Chrome, Firefox)
- Example: Installing React DevTools
- Example: Accessing DevTools features
- 2. Component Tree Inspector and Props Viewer
- Example: Editing props and state in DevTools
- Example: Debugging hooks with DevTools
- Example: Using "Rendered by" to trace component tree
- 3. React Profiler and Performance Analysis
- Example: Using Profiler to identify performance issues
- Example: Profiler API for custom measurements
- Example: Analyzing "Why Did This Render"
- 4. State and Context Debugging Tools
- Example: Debugging context issues
- Example: Using Redux DevTools with useReducer
- Example: Custom state debugging hooks
- 5. Time-travel Debugging and State History
- Example: Using Profiler for time-travel debugging
- Example: Redux DevTools time-travel
- Example: Building custom history tracker
- 6. Production Debugging and Error Tracking (Source Maps)
- Example: Sentry setup for React
- Example: LogRocket integration
- Example: Production error boundary with reporting
- Example: Source map configuration for production debugging
- React Developer Tools and Debugging Summary
- 1. React Router and Client-side Navigation (v6)
- Example: React Router v6 setup
- Example: Nested routes and layouts
- 2. State Management Libraries (Redux, Zustand, Jotai, Recoil)
- Example: Redux Toolkit setup
- Example: Zustand - minimal state management
- 3. UI Component Libraries (MUI, Chakra UI, shadcn/ui)
- Example: Material-UI (MUI) setup
- Example: Chakra UI setup
- Example: shadcn/ui - copy-paste approach
- 4. CSS-in-JS Libraries (styled-components, Emotion, CSS Modules)
- Example: styled-components
- Example: Tailwind CSS with React
- Example: CSS Modules
- 5. Form Libraries (Formik, React Hook Form, Zod)
- Example: React Hook Form with Zod
- Example: Dynamic fields and arrays
- 6. Data Fetching Libraries (SWR, React Query, TanStack Query)
- Example: React Query (TanStack Query)
- Example: SWR - simple data fetching
- Example: Infinite scroll with React Query
- React Ecosystem Integration Summary
- 1. XSS Prevention and Input Sanitization (DOMPurify)
- Example: Safe rendering of user input
- Example: Input sanitization library
- 2. dangerouslySetInnerHTML Safe Usage and Alternatives
- Example: Safe dangerouslySetInnerHTML usage
- 3. Props Validation and Type Checking (PropTypes, TypeScript)
- Example: PropTypes validation
- Example: TypeScript with runtime validation
- 4. Authentication and Authorization Patterns (JWT, OAuth)
- Example: JWT authentication with refresh tokens
- Example: Protected routes and role-based access
- 5. Secure State Management and Sensitive Data
- Example: Secure state management
- 6. Content Security Policy (CSP) and React Apps
- Example: CSP header configuration
- Example: Using CSP nonces with React
- React Security Best Practices Summary
- 1. Component Props TypeScript Interfaces and Types
- Example: Component props interfaces
- Example: Discriminated unions for variant props
- 2. Hook Type Definitions and Generic Hooks (useState
- Example: Typed React hooks
- Example: Generic custom hooks
- 3. Event Handler Type Safety (React.MouseEvent, React.ChangeEvent)
- Example: Type-safe event handlers
- Example: Generic event handler types
- 4. Context API TypeScript Patterns and Type Inference
- Example: Type-safe context with custom hook
- Example: Context with reducer pattern
- 5. Custom Hook Type Safety and Return Types
- Example: Custom hook with type inference
- Example: Advanced generic hooks
- 6. React.FC vs Function Component Types - Best Practices
- Example: React.FC vs function declaration
- Example: Component type patterns
- React TypeScript Integration Summary
- 1. React Profiler API and Performance Metrics
- Example: React Profiler API usage
- Example: Production performance monitoring
- 2. Bundle Size Analysis and Code Splitting Strategies
- Example: Advanced code splitting patterns
- Example: Bundle analysis and optimization
- 3. Memory Leak Detection and Prevention Techniques
- Example: Memory leak prevention patterns
- Example: Memory leak detection utilities
- 4. Re-render Analysis and Optimization with Why-Did-You-Render
- Example: Re-render optimization patterns
- Example: Advanced re-render debugging
- 5. Core Web Vitals and React Performance (LCP, FID, CLS)
- Example: Core Web Vitals optimization
- Example: React performance best practices
- 6. Performance Monitoring Tools (Lighthouse, React DevTools)
- Example: Production monitoring setup
- Example: Multi-tool monitoring setup
- React Performance Monitoring and Optimization Summary