JSLeague

Course duration

3 days

Technical requirements

90%
ReactJS Fundamentals
80%
ES6
80%
Node.js and npm/yarn
70%
Modern development tools

Course Overview

This intensive 3-day program covers advanced React concepts, modern patterns, and cutting-edge features introduced in React 19. Participants will learn performance optimization, advanced state management, server-side rendering, and production-ready deployment strategies.

Key Updates for 2025

React 19 Features: React Compiler, new hooks (useOptimistic, useFormStatus), enhanced concurrent rendering
Modern State Management: Zustand, Jotai, and Redux Toolkit replacing traditional Redux patterns
Server Components: React Server Components and Next.js App Router integration
Performance by Default: Leveraging React Compiler for automatic optimizations

Day 1: Modern React Fundamentals & Performance

React 19 Overview & Modern Architecture
- React Compiler and automatic optimizations
- New hooks: useOptimistic, useFormStatus, useDeferredValue
- Enhanced concurrent rendering capabilities
- Improved Server-Side Rendering (SSR) and streaming
Advanced Hooks & Performance Optimization
- Custom hooks patterns and composition strategies
- React Compiler benefits (reduced need for useMemo/useCallback)
- Profiling with React DevTools
- Code splitting with React.lazy and Suspense

Advanced Component Patterns
- Modern component patterns (replacing traditional HOCs)
- Render props, compound components, control props
- Error boundaries & Suspense implementation
- Concurrent rendering patterns
Testing Modern React Applications
- React Testing Library best practices
- Testing custom hooks and concurrent features
- Mocking and integration testing strategies

Day 2: State Management & Data Flow

Modern State Management Solutions
- Context API advanced patterns and optimization
- Zustand: Lightweight state management
- Jotai: Atomic state management
- Redux Toolkit: Modern Redux patterns
Server State Management
- React Query/TanStack Query implementation
- Server state vs client state separation
- Caching strategies and optimistic updates
- Background synchronization

Advanced Data Fetching & Forms
- Server actions in React 19
- Streaming data with Suspense
- useFormStatus hook implementation
- Form validation and optimistic updates
Authentication & Security
- Modern authentication patterns (JWT vs session-based)
- Auth context patterns and protected routes
- Security best practices (XSS, CSRF protection)

Day 3: Server Components & Production Deployment

Server Components & Next.js Integration
- React Server Components (RSC) fundamentals
- Server vs client components architecture
- Next.js App Router and file-based routing
- Server actions and middleware implementation
Advanced Rendering Patterns
- SSR, SSG, and ISR strategies
- Static vs dynamic rendering decisions
- Hydration strategies and optimization
- Streaming and progressive enhancement

Performance Monitoring & Optimization
- Core Web Vitals optimization
- Bundle analysis and optimization techniques
- Image optimization and CDN integration
- Error tracking and performance monitoring
Modern Deployment & DevOps
- Vercel, Netlify, and AWS deployment strategies
- Docker containerization for React apps
- CI/CD pipelines and environment management
- Progressive Web App (PWA) features