RxJS Mastery: Professional Course – Thinking in Streams
A Complete 20-Module Video Course on Functional Reactive Programming with RxJS
This professional-level course is built directly from the comprehensive structure in the uploaded RxJS Deep Dive Course NotebookLM Mind Map, the detailed content in rxjs-what-is-it-supergrok-2026-0-28.md (history, core concepts, state management patterns, DevTools integration, time travel, backpressure, performance, and advanced operators), and the slide frameworks in the two PowerPoint files (RxJS_Enterprise_Mastery.pptx and supergrok-Thinking_in_Streams-nlm.pptx).
Each of the 20 Modules contains:
- 5 Video Lessons (conceptual deep dives + live coding + real-world project work)
- 1 End-of-Module Quiz (5 multiple-choice questions with explanations)
The course progresses from foundational concepts to enterprise-grade architecture, performance, testing, and a capstone project. All lessons emphasize thinking in streams, marble diagrams, pure operators, and production-ready patterns.
Module 1: Foundations
Video Lessons
1.1 The Philosophy of Functional Reactive Programming & RxJS Origins (Haskell → LINQ → Rx.NET → RxJS)
1.2 The Observable Contract: next, error, complete – The Heart of RxJS
1.3 Cold vs Hot Observables: When Data Flows and When It Doesn’t
1.4 Creation Operators Masterclass: of(), from(), interval(), timer(), fromEvent(), ajax()
1.5 Project Workshop: Building a Reactive Number Generator Application
End of Module Quiz: 5 multiple-choice questions on Observable fundamentals, creation operators, and cold/hot behavior.
Module 2: Core Concepts
Video Lessons
2.1 Observer Pattern vs Iterator Pattern – The Mathematical Duality
2.2 Marble Diagrams: Reading and Creating Visual Stream Representations
2.3 Schedulers Deep Overview: async, asap, queueScheduler, animationFrameScheduler
2.4 Subscription Lifecycle, Unsubscribe, and Memory Safety
2.5 Project: Interactive Marble Diagram Visualizer Tool
End of Module Quiz: 5 multiple-choice questions on patterns, schedulers, and marble interpretation.
Module 3: Pipe Composition
Video Lessons
3.1 The pipe() Method and Declarative Operator Chaining
3.2 Pure vs Impure Operators – Writing Side-Effect-Free Code
3.3 Transformation Operators: map, scan, tap, and migrating deprecated pluck usage 3.4 Filtering & Utility Operators: filter, debounceTime, distinctUntilChanged, delay
3.5 Project: Search Feature Refactoring – From Callback Hell to Clean Pipes
End of Module Quiz: 5 multiple-choice questions on pipe composition and operator purity.
Module 4: Domain Operators
Video Lessons
4.1 Business Domain Naming Conventions for Readability
4.2 Building a Reusable Domain Operator Library
4.3 Creating Custom Domain-Specific Operators (e.g., search$, validate$)
4.4 Composing Domain Operators for Complex Business Logic
4.5 Project: Blog Platform Library – Domain Operators in Action
End of Module Quiz: 5 multiple-choice questions on domain modeling with operators.
Module 5: Flattening Operators
Video Lessons
5.1 Higher-Order Observables Explained
5.2 switchMap, concatMap, mergeMap, exhaustMap – Choosing the Right Flattener
5.3 Common Pitfalls and Performance Implications of Each
5.4 Real-World Flattening Patterns (HTTP + User Input)
5.5 Project: GitHub Search App with Intelligent Flattening
End of Module Quiz: 5 multiple-choice questions on flattening operators and higher-order observables.
Module 6: Custom Flattening
Video Lessons
6.1 Intelligent Flattening Strategies for Complex Workflows
6.2 Backpressure-Aware Flattening Techniques
6.3 Building Custom Flattening Operators
6.4 Combining Flattening with Error Boundaries
6.5 Project: Task Management App with Advanced Flattening
End of Module Quiz: 5 multiple-choice questions on custom flattening and backpressure awareness.
Module 7: Error Handling
Video Lessons
7.1 Error Boundaries in Reactive Streams
7.2 Recovery Patterns: catchError, retry config, and legacy retryWhen 7.3 Global Error Handling System Design
7.4 Logging, Telemetry, and User-Friendly Error UX
7.5 Project: Global Error System for Enterprise Apps
End of Module Quiz: 5 multiple-choice questions on error handling strategies.
Module 8: Retry & Resilience
Video Lessons
8.1 Exponential Backoff Strategies
8.2 Circuit Breaker Pattern in RxJS
8.3 Combining Retry with Fallback Observables
8.4 Resilience Testing and Chaos Engineering
8.5 Project: Resilient API Client with Full Retry Logic
End of Module Quiz: 5 multiple-choice questions on resilience patterns.
Module 9: Schedulers Deep Dive
Video Lessons
9.1 subscribeOn vs observeOn – Execution Context Mastery
9.2 Virtual Time Testing with TestScheduler
9.3 Animation & UI Schedulers for Smooth Experiences
9.4 Performance Tuning with Custom Schedulers
9.5 Project: Animation Dashboard with Precise Timing
End of Module Quiz: 5 multiple-choice questions on schedulers and virtual time.
Module 10: State Management Basics
Video Lessons
10.1 Why RxJS Excels at State Management
10.2 BehaviorSubject Pattern for Simple Shared State
10.3 The Scan + Reducer Pattern for Predictable, Immutable State
10.4 Building a Todo App with Reactive State Streams
10.5 Project: Complete Todo Application with scan + Reducer
End of Module Quiz: 5 multiple-choice questions on BehaviorSubject and scan/reducer patterns.
Module 11: Advanced State Management
Video Lessons
11.1 Undo/Redo Logic with History Management
11.2 Time Travel Support and State Snapshots
11.3 Combining scan with Higher-Order State Streams
11.4 Optimistic Updates and Conflict Resolution
11.5 Project: Enhanced Todo App with Full Undo/Redo & Time Travel
End of Module Quiz: 5 multiple-choice questions on advanced state patterns and time travel.
Module 12: DevTools & Debugging
Video Lessons
12.1 Redux DevTools Integration with RxJS State
12.2 Action Sanitization and Lightweight Logging
12.3 Custom DevTools Enhancer with Performance Metrics
12.4 Time Travel Debugging and State Inspection
12.5 Project: Full State Debugging System with DevTools
End of Module Quiz: 5 multiple-choice questions on DevTools integration and debugging techniques.
Module 13: Backpressure Strategies
Video Lessons
13.1 Understanding Backpressure in High-Frequency Streams
13.2 Controlled Concurrency with exhaustMap & buffer
13.3 Handling Live Data Feeds (Stock Tickers, Sensors)
13.4 Reactive Streams Specification Concepts (for interoperability)
13.5 Project: Live Stock Ticker with Intelligent Backpressure
End of Module Quiz: 5 multiple-choice questions on backpressure and concurrency control.
Module 14: Window & Buffer
Video Lessons
14.1 Buffer vs Window Philosophy and Use Cases
14.2 Temporal Reasoning with Time-Based Windows
14.3 Batching Analytics Data Efficiently
14.4 Combining Window/Buffer with Other Operators
14.5 Project: Analytics Batching Dashboard
End of Module Quiz: 5 multiple-choice questions on windowing and buffering.
Module 15: Time Windowing
Video Lessons
15.1 Tumbling vs Sliding Windows
15.2 Moving Averages and Real-Time Aggregations
15.3 Windowing for Rate Limiting and Throttling
15.4 Advanced Temporal Patterns
15.5 Project: Real-Time Analytics Dashboard with Time Windows
End of Module Quiz: 5 multiple-choice questions on time-based windowing.
Module 16: Custom Operators Mastery
Video Lessons
16.1 Building Stateful Custom Operators
16.2 TypeScript Type-Safety for Custom Operators
16.3 Testing and Documenting Custom Operators
16.4 Publishing and Sharing Operator Libraries
16.5 Project: Enterprise E-commerce Operator Library
End of Module Quiz: 5 multiple-choice questions on custom operator development.
Module 17: Architecture Patterns
Video Lessons
17.1 Feature-Based Reactive Architecture Design
17.2 RxJS + Signals Hybrid Patterns (2026 Best Practices)
17.3 Layered Architecture with Domain Operators
17.4 Refactoring Legacy Code to Reactive Streams
17.5 Project: Large-Scale App Refactoring Case Study
End of Module Quiz: 5 multiple-choice questions on reactive architecture.
Module 18: Performance
Video Lessons
18.1 Memory Leak Identification and Prevention
18.2 shareReplay Strategies and Multicasting
18.3 Optimizing High-Throughput Streams
18.4 Bundle Size, Tree-Shaking, and Lazy Loading Operators
18.5 Project: Full App Performance Optimization & Audit
End of Module Quiz: 5 multiple-choice questions on performance and optimization.
Module 19: Testing
Video Lessons
19.1 Marble Diagram Testing with TestScheduler
19.2 Deep Dive into TestScheduler for Virtual Time
19.3 Unit Testing Operators, Effects, and State Streams
19.4 Integration & E2E Testing Strategies
19.5 Project: Complete Library Testing Suite
End of Module Quiz: 5 multiple-choice questions on RxJS testing techniques.
Module 20: Capstone
Video Lessons
20.1 Migration Strategies from Promises/Callbacks to RxJS
20.2 Future of Reactive Programming (Signals, Effect, etc.)
20.3 Building a Collaborative Real-Time Dashboard (Full Integration)
20.4 Production Deployment, Monitoring & Observability
20.5 Final Capstone Project Presentation & Code Review
End of Module Quiz: 5 multiple-choice questions covering the entire course + capstone reflection.
Course Summary
- Total: 100 Video Lessons + 20 Quizzes (100 questions total)
- Hands-on Projects: 20 real-world projects (Number Generator → Collaborative Dashboard)
- Progression: Foundations → Core → Composition → Domain → Advanced Patterns → Architecture → Capstone
- Bonus Materials (integrated from uploaded files): Full history timeline, marble diagram resources, complete state management examples (scan + reducer, undo/redo, DevTools enhancer, time travel), performance checklists, and migration guides.
This outline is ready for video production. Each lesson can be 8–15 minutes, with live coding, diagrams, and project walkthroughs. The structure ensures learners finish with production-grade RxJS skills for Angular, React, or vanilla TypeScript applications.
Note: This file is located in the
docs/folder for better project organization.