XState v5 Reference Documentation
Comprehensive reference materials for XState v5 implementation and analysis in backend applications.
Available References
Core API
Complete API reference for XState v5 including:
- Machine creation (
createMachine,setup) - Actor management (
createActor, lifecycle methods) - State configuration and transitions
- Actions, guards, and services
- Utility functions and type helpers
Actors
Deep dive into the actor model:
- Actor types (state machine, promise, callback, transition, observable)
- Actor lifecycle and communication
- Spawning vs invoking actors
- Actor systems and orchestration
- Error handling and persistence
Common Patterns
Production-ready patterns and solutions:
- Loading states with retry logic
- Form validation and submission
- Authentication flows
- Pagination and data fetching
- Wizard/stepper interfaces
- Parallel states and history
- Debouncing and queue processing
- Modal/dialog management
- Connection handling with reconnection
TypeScript Integration
Complete TypeScript usage guide:
- Setup pattern with strong typing
- Type inference and helpers
- Generic machine factories
- Event assertions and discriminated unions
- Backend service types
- Migration from v4 typegen
Testing Strategies
Backend testing approaches:
- Unit testing state machines
- Testing with xstate-audition
- Mocking external services and databases
- Testing async backend operations
- Performance testing for server environments
- Best practices for backend testing
Quick Start
For new XState v5 implementations, start with:
- TypeScript Integration - Set up proper typing
- Core API - Learn the fundamental APIs
- Common Patterns - Apply proven solutions
- Testing Strategies - Ensure reliability
External Resources
- Official XState Documentation
- XState Visualizer
- XState Catalog
- xstate-audition - Model-based testing
Version Requirements
- XState: v5.x
- TypeScript: 5.0 or greater
- Node.js: 18+ recommended
Contributing
To add or update reference documentation:
- Follow the existing markdown structure
- Include practical code examples
- Document both best practices and anti-patterns
- Keep examples TypeScript-first
- Test all code examples for accuracy