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18 SECTIONS · 285 TOPICS

RXJS Roadmap

  1. RxJS Observable Creation (of, from, fromEvent)

    1. 1. of, from, and fromEvent - Creating Observables
    2. Example: Basic creation operators
    3. 2. interval, timer, and range - Periodic Observables
    4. Example: Time-based and sequence creators
    5. 3. fromPromise - Converting Promises to Observables
    6. Example: Promise and async integration
    7. 4. ajax and fetch - HTTP Request Observables
    8. Example: HTTP requests with ajax and fetch
    9. 5. Custom Observable Creation (new Observable())
    10. Example: Custom Observable implementation
    11. 6. EMPTY, NEVER, and throwError - Constant Observables
    12. Example: Special Observable constants
    13. Section 1 Summary

  2. Observable Lifecycle and Subscription Management

    1. 1. subscribe() Method - Observer Pattern Implementation
    2. Example: Different subscribe patterns
    3. 2. Subscription Object and unsubscribe() - Memory Management
    4. Example: Subscription lifecycle management
    5. 3. Subscription add() and remove() - Composition Methods
    6. Example: Composing subscriptions
    7. 4. AutoUnsubscribe Patterns - Angular and React Cleanup
    8. Example: AutoUnsubscribe patterns
    9. 5. Memory Leak Prevention - Subscription Best Practices
    10. Example: Memory leak prevention
    11. 6. Subscription Containers - Managing Multiple Subscriptions
    12. Example: Subscription container patterns
    13. Section 2 Summary

  3. RxJS Transformation Operators (map, scan, switchMap)

    1. 1. map and mapTo - Value Transformation Operators
    2. Example: map and mapTo transformations
    3. 2. pluck for Property Extraction
    4. Example: pluck deprecated - use map instead
    5. 3. scan and reduce - Accumulation Patterns
    6. Example: scan vs reduce accumulation
    7. 4. buffer, bufferTime, bufferCount - Buffering Operators
    8. Example: Buffering strategies
    9. 5. concatMap, mergeMap, switchMap - Flattening Operators
    10. Example: Higher-order mapping strategies
    11. 6. exhaustMap - Ignore-while-active Higher-order Operator
    12. Example: exhaustMap for preventing concurrent operations
    13. Section 3 Summary

  4. RxJS Filtering Operators (filter, take, debounce)

    1. 1. filter - Conditional Value Filtering Operator
    2. Example: Conditional filtering patterns
    3. 2. take, takeUntil, takeWhile - Take Operators
    4. Example: Take operator variants
    5. 3. first, last, single - Value Extraction Operators
    6. Example: Value extraction operators
    7. 4. skip, skipUntil, skipWhile - Skip Operators
    8. Example: Skip operator patterns
    9. 5. distinct and distinctUntilChanged - Deduplication
    10. Example: Deduplication strategies
    11. 6. debounceTime and throttleTime - Rate Limiting Operators
    12. Example: Rate limiting strategies
    13. Section 4 Summary

  5. RxJS Combination Operators (merge, combineLatest, zip)

    1. 1. merge and mergeAll - Concurrent Stream Combination
    2. Example: Concurrent stream combination with merge
    3. 2. concat and concatAll - Sequential Stream Combination
    4. Example: Sequential stream combination with concat
    5. 3. combineLatest and combineLatestWith - Multi-stream Sync
    6. Example: Multi-stream coordination with combineLatest
    7. 4. withLatestFrom - Auxiliary Stream Integration
    8. Example: Auxiliary stream integration with withLatestFrom
    9. 5. zip and zipWith - Paired Value Emission
    10. Example: Paired value emission with zip
    11. 6. startWith and endWith - Stream Initialization
    12. Example: Stream initialization and termination
    13. Section 5 Summary

  6. RxJS Error Handling (catchError, retry, throwError)

    1. 1. catchError - Exception Handling and Recovery
    2. Example: Error catching and recovery
    3. 2. retry and retryWhen - Automatic Retry Logic
    4. Example: Retry strategies
    5. 3. throwError - Error Emission Operator
    6. Example: Error emission patterns
    7. 4. onErrorResumeNext - Alternative Stream Switching
    8. Example: Alternative stream switching
    9. 5. timeout and timeoutWith - Time-based Errors
    10. Example: Timeout handling
    11. 6. finalize - Cleanup Operations (like finally)
    12. Example: Cleanup operations with finalize
    13. Section 6 Summary

  7. RxJS Subjects (BehaviorSubject, ReplaySubject)

    1. 1. Subject - Multicast and Imperative Emission
    2. Example: Subject basic usage and multicasting
    3. 2. BehaviorSubject - State Management with Initial Value
    4. Example: BehaviorSubject for state management
    5. 3. ReplaySubject - Historical Value Replay (n values)
    6. Example: ReplaySubject value replay
    7. 4. AsyncSubject - Last Value Emission Only
    8. Example: AsyncSubject final value emission
    9. 5. share and shareReplay - Reference Counting Multicast
    10. Example: Sharing and replay strategies
    11. 6. multicast and publish - Custom Multicasting Operators
    12. Example: Custom multicasting patterns
    13. Section 7 Summary

  8. RxJS Schedulers (asyncScheduler, observeOn)

    1. 1. asyncScheduler - Macro-task Scheduling (setTimeout)
    2. Example: asyncScheduler for async execution
    3. 2. queueScheduler - Synchronous Queue Scheduling
    4. Example: queueScheduler for synchronous execution
    5. 3. animationFrameScheduler - Browser Animation Sync
    6. Example: animationFrameScheduler for smooth animations
    7. 4. asapScheduler - Micro-task Scheduling (Promise)
    8. Example: asapScheduler for micro-task execution
    9. 5. observeOn and subscribeOn - Execution Context Control
    10. Example: observeOn vs subscribeOn control
    11. 6. VirtualTimeScheduler - Testing and Marble Diagrams
    12. Example: VirtualTimeScheduler for testing
    13. Section 8 Summary

  9. Higher-Order Observables (switchMap, mergeMap, concatMap)

    1. 1. switchMap - Cancel Previous, Switch to Latest
    2. Example: switchMap for request cancellation
    3. 2. mergeMap (flatMap) - Concurrent Inner Observables
    4. Example: mergeMap for parallel processing
    5. 3. concatMap - Sequential Inner Observable Processing
    6. Example: concatMap for sequential processing
    7. 4. exhaustMap - Ignore New While Busy Pattern
    8. Example: exhaustMap to prevent duplicate operations
    9. 5. expand - Recursive Observable Generation
    10. Example: expand for recursive operations
    11. 6. window and windowTime - Grouped Emission Windows
    12. Example: window operators for grouped processing
    13. Section 9 Summary

  10. RxJS Utility Operators (tap, delay, repeat)

    1. 1. tap (do) - Side Effects Without Stream Modification
    2. Example: tap for debugging and side effects
    3. 2. delay and delayWhen - Time-based Stream Delays
    4. Example: delay operators for timing control
    5. 3. repeat and repeatWhen - Stream Repetition
    6. Example: repeat operators for stream repetition
    7. 4. sample and sampleTime - Periodic Sampling
    8. Example: sample operators for value sampling
    9. 5. audit and auditTime - Trailing Edge Throttling
    10. Example: audit operators for trailing edge throttling
    11. 6. materialize and dematerialize - Notification Objects
    12. Example: materialize and dematerialize for metadata handling
    13. Section 10 Summary

  11. Conditional and Boolean Operators (iif, every, find)

    1. 1. iif - Conditional Observable Selection (ternary)
    2. Example: iif for conditional observable selection
    3. 2. every - Universal Condition Checking (all values)
    4. Example: every for universal condition checking
    5. 3. find and findIndex - First Match Operations
    6. Example: find and findIndex for searching
    7. 4. isEmpty - Empty Stream Detection
    8. Example: isEmpty for empty stream detection
    9. 5. defaultIfEmpty - Fallback Value Provision
    10. Example: defaultIfEmpty for fallback values
    11. 6. sequenceEqual - Stream Comparison Operator
    12. Example: sequenceEqual for stream comparison
    13. Section 11 Summary

  12. Time-based Operators (debounceTime, throttleTime, delay)

    1. 1. debounceTime - Input Stabilization (search input)
    2. Example: debounceTime for input stabilization
    3. 2. throttleTime - Rate Limiting (leading edge)
    4. Example: throttleTime for rate limiting
    5. 3. auditTime - Trailing Edge Rate Limiting
    6. Example: auditTime for trailing edge sampling
    7. 4. sampleTime - Periodic Value Sampling
    8. Example: sampleTime for periodic sampling
    9. 5. timeInterval - Emission Time Measurement
    10. Example: timeInterval for timing measurement
    11. 6. timestamp - Emission Timestamping Operator
    12. Example: timestamp for emission timestamping
    13. Section 12 Summary

  13. Custom RxJS Operators Development

    1. 1. Creating Custom Pipeable Operators (pipe pattern)
    2. Example: Basic custom pipeable operator
    3. Example: Parameterized custom operator
    4. Example: Operator with state management
    5. 2. Operator Function Composition - Reusable Patterns
    6. Example: Composing operators into reusable functions
    7. Example: Dynamic operator composition
    8. 3. Reusable Operator Libraries - Sharing Code
    9. Example: Building a custom operator library
    10. Example: Domain-specific operator library
    11. 4. Higher-Order Custom Operator Development
    12. Example: Custom flattening operator
    13. Example: Custom buffering operator
    14. 5. Operator Testing and Validation - Unit Tests
    15. Example: Marble testing custom operators
    16. Example: Testing operator with state
    17. Example: Type testing
    18. 6. Community Operator Patterns (RxJS Ninja, etc.)
    19. Example: Common community operator patterns
    20. Example: Advanced retry with exponential backoff
    21. Example: Caching with stale-while-revalidate
    22. Section 13 Summary

  14. RxJS Testing (TestScheduler, Marble Testing)

    1. 1. TestScheduler - Virtual Time Testing Framework
    2. Example: Basic TestScheduler setup
    3. Example: Testing asynchronous operations synchronously
    4. 2. Marble Testing Syntax - ASCII Diagram Patterns
    5. Example: Marble diagram patterns
    6. Example: Complex marble test
    7. 3. hot() and cold() - Observable Testing Helpers
    8. Example: cold() vs hot() observables
    9. Example: Using values object for complex data
    10. 4. expectObservable() and expectSubscriptions() - Assertions
    11. Example: Using expectObservable()
    12. Example: Using expectSubscriptions()
    13. 5. flush() and getMessages() - Test Execution Control
    14. Example: Using flush() for manual control
    15. Example: Using getMessages() for custom assertions
    16. 6. Mock Observers and Subscription Testing
    17. Example: Mock observer testing
    18. Example: Subscription lifecycle testing
    19. Example: Testing with Subject mocks
    20. Section 14 Summary

  15. RxJS Performance Optimization and Memory

    1. 1. Subscription Management - Preventing Memory Leaks
    2. Example: Subscription container pattern
    3. Example: takeUntil pattern for automatic cleanup
    4. Example: SubSink pattern for advanced subscription management
    5. 2. Operator Chain Optimization - Pipeline Efficiency
    6. Example: Operator ordering optimization
    7. Example: Avoiding nested subscriptions
    8. Example: Choosing the right flattening operator
    9. 3. Memory Leak Detection and Prevention Strategies
    10. Example: Common memory leak scenarios and fixes
    11. Example: Detecting memory leaks
    12. Example: shareReplay memory leak prevention
    13. 4. Cold vs Hot Observable - Performance Characteristics
    14. Example: Cold observable behavior
    15. Example: Converting cold to hot for better performance
    16. Example: Real-world HTTP optimization
    17. 5. share vs shareReplay vs refCount - Multicast Strategies
    18. Example: Choosing the right sharing strategy
    19. Example: Share strategy comparison
    20. 6. Backpressure Handling - Buffer Management
    21. Example: Handling fast producers with sampling
    22. Example: Buffering for batch processing
    23. Example: Backpressure with concurrency control
    24. Example: Preventing queue overflow
    25. Section 15 Summary

  16. RxJS Framework Integration (Angular, React, Vue)

    1. 1. Angular RxJS Integration - async Pipe and Services
    2. Example: async pipe for automatic subscription management
    3. Example: Reactive forms with RxJS
    4. Example: Angular service with state management
    5. 2. React Hooks with RxJS - useObservable Pattern
    6. Example: Custom useObservable hook
    7. Example: useSubject for event handling
    8. Example: Advanced observable state management
    9. 3. Vue.js Composition API - RxJS Integration
    10. Example: Vue composables for RxJS
    11. Example: Vue RxJS state management
    12. 4. Node.js Streams - RxJS Integration Patterns
    13. Example: Node.js stream to observable
    14. Example: Observable to Node.js stream
    15. 5. WebSocket Integration - Real-time Data Streams
    16. Example: Basic WebSocket observable
    17. Example: WebSocket with auto-reconnect
    18. Example: WebSocket with message queue and multiplexing
    19. 6. Service Worker and RxJS - PWA Patterns
    20. Example: Service Worker messaging with RxJS
    21. Example: Cache strategies with RxJS
    22. Section 16 Summary

  17. RxJS Real-world Patterns (HTTP, Forms, WebSocket)

    1. 1. HTTP Request Management - Cancellation and Retry
    2. Example: Search with auto-cancel and debounce
    3. Example: Prevent duplicate submissions
    4. Example: Parallel requests with concurrency limit
    5. Example: Polling with start/stop control
    6. 2. User Input Handling - Form Validation with RxJS
    7. Example: Real-time form validation
    8. Example: Password strength meter
    9. Example: Multi-step form with state management
    10. 3. Real-time Data Synchronization - Live Updates
    11. Example: Optimistic update pattern
    12. Example: Offline-first with sync queue
    13. 4. WebSocket Message Processing - Bi-directional Streams
    14. Example: WebSocket message router
    15. 5. Animation and UI State - RxJS State Management
    16. Example: Smooth scroll animation
    17. Example: Drag and drop with RxJS
    18. Example: UI state machine
    19. 6. Complex Workflow Orchestration - Multi-step Flows
    20. Example: Multi-step checkout workflow
    21. Example: Circuit breaker pattern
    22. Section 17 Summary

  18. RxJS Debugging and DevTools

    1. 1. RxJS DevTools - Browser Extension for Debugging
    2. Example: Enable RxJS DevTools instrumentation
    3. 2. tap Operator - Stream Debugging and Logging
    4. Example: Comprehensive tap debugging
    5. Example: Stack trace capture with tap
    6. 3. Observable Inspector - Stream Visualization Tools
    7. Example: Custom observable inspector
    8. 4. Console Logging Patterns - Debugging Observables
    9. Example: Advanced logging patterns
    10. Example: Production-safe conditional logging
    11. 5. Stack Trace Preservation - Error Context Tracking
    12. Example: Enhanced error context
    13. Example: Zone.js async stack traces (Angular)
    14. 6. Production Debugging - Monitoring Strategies
    15. Example: Production error tracking
    16. Example: Performance monitoring
    17. Example: Feature-flag controlled debugging
    18. Section 18 Summary