Object Creation Methods

What OOP concept is being implemented?

class Base {
  constructor() {
    if (new.target === Base) {
      throw new Error('Abstract class cannot be instantiated');
    }
  }
  method() { throw new Error('Abstract method'); }
}

Interface
Abstract Class
This implements an abstract class pattern: 1) Prevents direct instantiation using new.target check, 2) Defines abstract methods that must be implemented by subclasses, 3) Enforces contract for derived classes, 4) Provides template for inheritance, 5) Common pattern in complex OOP hierarchies, 6) Ensures proper inheritance implementation.
Singleton
Factory

Next Question (10/20)