JavaScript
🎯 Design patterns
Reusable solutions to common problems: module, factory, singleton, observer and strategy.
What you'll learn
- Apply the module pattern to encapsulate private state with closures and expose only a public interface.
- Create objects with a factory function and guarantee a single instance with the singleton pattern.
- Implement the observer pattern by subscribing, unsubscribing and notifying multiple observers.
- Replace
if/elsechains with the strategy pattern by selecting interchangeable functions at runtime.
Lessons
Module and factory patternsEncapsulate state and create objects flexibly. Singleton and observerA single instance and event subscription. Strategy patternSwap algorithms at runtime.Practice this module in the app
DevPath is a hands-on course: you read the theory here; in the app you put it into practice with exercises that really run, offline.
Start free in the app →