Patterns & Architecture
This section contains essential patterns and best practices that every Angular developer should know. Learn how to structure your code and applications for maintainability, scalability, and testability—from individual components to entire application architectures.
Pattern Guides
Section titled “Pattern Guides”Architecture Patterns
Section titled “Architecture Patterns”Architecture Patterns — Scalable application structures and when to use them:
- Module-Based Architecture — Organize by domain with NgModules
- Feature-Based Architecture — Standalone components and modern routing
- Monolithic Architecture — Simple, all-in-one applications
- Micro Frontend Architecture — Independent feature teams
- Decision matrix and migration paths
Design Patterns
Section titled “Design Patterns”Design Patterns — Seven essential patterns for Angular development:
- Singleton Pattern — Global state management
- Facade Pattern — Simplifying complex subsystems
- Factory Pattern — Dynamic object creation
- Strategy Pattern — Runtime algorithm switching
- Dependency Injection — Loose coupling
- Observer Pattern — Reactive updates
- Decorator Pattern — Metadata & behavior
SOLID Principles
Section titled “SOLID Principles”SOLID Principles — Five fundamental design guidelines for maintainable code:
- Single Responsibility Principle — One reason to change per class
- Open/Closed Principle — Open for extension, closed for modification
- Liskov Substitution Principle — Subtypes must honor parent contracts
- Interface Segregation Principle — Segregate large interfaces
- Dependency Inversion Principle — Depend on abstractions, not implementations
How to Use These Guides
Section titled “How to Use These Guides”Start With Architecture: Begin with Architecture Patterns to understand the overall structure of your application
Add Design Patterns: Learn Design Patterns for solving common structural problems within your code
Establish Guidelines: Use SOLID Principles to maintain code quality and long-term maintainability
Apply Gradually: Don’t try to implement everything at once; introduce patterns as you refactor
Combine Them: Architecture, design patterns, and SOLID principles work together to create well-designed systems
Refer Back: Use these guides as references when designing new features and making architectural decisions
Team Discussion: Share with your team to establish consistent practices across your codebase