design patterns nodejs

YOU.com answered on September 11, 2023 Popularity 10/10 Helpfulness 1/10

answer design patterns nodejs

design patterns nodejs

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Here are a few examples of design patterns commonly used in Node.js:

1. Singleton Pattern:
   const instance = require('./module');

2. Factory Pattern:
   class Car {
     constructor(brand, model) {
       this.brand = brand;
       this.model = model;
     }
   }

   class CarFactory {
     createCar(brand, model) {
       return new Car(brand, model);
     }
   }

3. Observer Pattern:
   class Subject {
     constructor() {
       this.observers = [];
     }
   
     addObserver(observer) {
       this.observers.push(observer);
     }
   
     notifyObservers(data) {
       this.observers.forEach(observer => observer.update(data));
     }
   }

   class Observer {
     update(data) {
       console.log(`Received data: ${data}`);
     }
   }

   const subject = new Subject();
   const observer = new Observer();
   subject.addObserver(observer);
   subject.notifyObservers('Hello world!');

These are just a few examples, but there are several other design patterns that can be applied in Node.js depending on the specific use case.

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Contributed on Sep 11 2023

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