@the-arcade-01

Circuit Breaker Design Pattern in TS

Sep 13, 2025 · 2 min read · Mostly use in backend (microservices pattern) but can be implement in Javascript Idea is, eg: let’s say there is an api which we want to hit, so hitting the api, we get an error, so we try to hit the api for like 3 times (retries), and everytime we ...

Singleton Design Pattern in TS

Sep 13, 2025 · 2 min read · Used for creating objects only once eg: db conn object etc. Important point: Never use new keyword for the singleton, always make the constructor private and expose a getInstance() method Why? the purpose of the new keyword is to create fresh ne...

Observer Design Pattern in TS

Sep 13, 2025 · 2 min read · Widely used pattern Real example: event listeners, let say we want to run a operation on a certain action like click of a button, then we can attach an event to that button. This is basically the same which observer pattern does. We’ve Publishers & ...

Decorator Design Pattern in TS

Sep 13, 2025 · 1 min read · Structural design pattern used for add new properties or behaviour to objects. Full Code class Pizza { getPrice() { return 0; } } class BasicPizza extends Pizza { price: number; constructor(price: number) { super(); this.price ...

Factory Design Pattern in TS

Sep 13, 2025 · 1 min read · Creational pattern used for creating objects in TS A factory class provides a centralized creation method for creating all types of similar objects. Full Code class CardPayment { private amount: number; private cardNum: number; private cardC...