Какие знаешь парадигмы ООП

class User {
  #password; // приватное поле

  constructor(login, password) {
    this.login = login;
    this.#password = password;
  }
}

class Animal {}
class Dog extends Animal {}

class Shape {
  area() { throw new Error('Not implemented') }
}

class Circle extends Shape {
  area() { return Math.PI * this.radius ** 2 }
}

abstract class Database {
  abstract connect();
}