React 19 Mastery: Advanced Patterns, Performance, Routing, Advanced State, Forms & Testing

What's Inside

Advanced React Mastery: Build Real-World, Scalable, Production-Ready React Applications

You've learned the basics. You can build components, manage state, and handle props.

But now — you’re ready for more.

You're ready to build scalable, production-grade applications like real React developers do.

Welcome to Advanced React Mastery — the course that transforms intermediate learners into confident, job-ready React professionals.


What Makes This Course Different?

This is not another theory-based tutorial.

This course is built for those who already know React… but want to master it.

You'll dive into advanced design patterns, performance optimizations, application architecture, and next-gen state management — the concepts real teams use when building large-scale apps.

You’ll build real, practical components and application features using patterns and strategies you'll actually use in professional development.


What You’ll Master in This Course


1. Advanced React Patterns (The Real Developer Skillset)

Learn how to architect reusable, scalable, flexible components using:

  • Render Props
  • Compound Components
  • Controlled & Uncontrolled Props
  • State Reducer
  • Prop Getters
  • Custom Abstraction Patterns

Build component APIs that other developers love to use.

These are the same patterns used in libraries like Chakra UI, React Hook Form, and Headless UI.


2. React Performance Optimization (Make Apps Feel Instant)

Stop guessing — start measuring and optimizing:

  • Reduce unnecessary re-renders using React.memo, useCallback, and useMemo
  • Boost startup time with code splitting, React.lazy, and Suspense
  • Use virtualization and the React Profiler for large-data performance

Your apps won’t just work — they’ll feel fast, smooth, and instant.


3. Advanced State Management (Local, Global & Server)

Master modern state strategies used in high-scale applications:

  • Local complex state with useReducer
  • Global state using Context, Zustand, and Redux Toolkit
  • Server-side state and caching using React Query (TanStack)

You'll know exactly when to use each tool — and when to avoid overkill.


4. Forms, Validation & Smart Input Handling

Real applications depend on clean, reliable data. You’ll master:

  • High-performance forms using react-hook-form
  • Schema validation with Yup or Zod
  • Building reusable custom form components with instant error handling

Build bulletproof, user-friendly forms like a pro.


5. Testing React Applications (React 19)

Test like a real front-end engineer using:

  • React Testing Library for component testing
  • userEvent API for simulating real user behavior
  • Testing async flows, API calls, error boundaries, and loading states

Deliver with confidence. No more shipping risky code.


Real Projects You’ll Build

Across the course, you’ll build real, production-level features, including:

  • Custom modal component using the Compound Pattern
  • Dropdown menu using Render Props
  • Scalable form system with validation using react-hook-form & Zod
  • Zustand-powered theme & preference manager
  • High-performance list with virtualization and memoized rendering
  • Fully tested component suite with snapshot, async, and user-event tests

Who Is This Course For?

This course is for students who completed the Complete React 19 course.

It’s designed for:

  • React developers who know the basics but struggle with scalability
  • Self-learners who want to fill the real-world knowledge gap
  • Developers preparing for professional React interviews
  • Front-end engineers ready to build production-ready apps

If you’re ready to go from React learner to React developer, this is your next step.


By the End of This Course, You Will:

  • Think in patterns, not just components
  • Build scalable, flexible React systems
  • Write fast, optimized applications
  • Confidently manage any state — local, global, or server
  • Test behaviors, interactions, and features with confidence
  • Be fully prepared for professional React roles

This is where you stop learning React the tutorial way —
and start mastering React the professional way.

Ready to go from React enthusiast to React expert? Enroll now.

Course Curriculum

This course is closed for enrollment.

49 Lectures
4+ Hours of Video
Lifetime Access
24/7 Support
Instructor Rating
Issam Baou

Development Island is a UK based innovative company specialised in providing the best technology courses on the internet. We are proud to be teaching 100000 students from 173+ countries. We believe our courses are the best in the market for two reasons:

- We use a practical approach that we developed over years of experience: Learning by doing.

- We make your learning experience enjoyable and fun.

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