Dev.to
5/10/2026

Software Design Patterns
Short summary
Detailed guide to 11 core design patterns including Factory, Singleton, Builder, Adapter, Decorator, Facade, Flyweight, Composite, and Bridge, with complete JavaScript code examples for each. Explains the problem each pattern solves, when it's appropriate to use, and provides practical, runnable implementations. Patterns are organized into three categories: object creation mechanisms, class and object composition, and behavioral patterns for maintainable code.
- •Covers 11 design patterns with JavaScript implementations for each
- •Each pattern includes problem statement, use-case guidance, and code examples
- •Organized by pattern category: creation, composition, and behavioral
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