Classes & Objects

        
          // Class declaration
class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  // Instance method
  greet() {
    return `Hello, I'm ${this.name}`;
  }

  // Getter
  get isAdult() {
    return this.age >= 18;
  }

  // Setter
  set age(newAge) {
    if (newAge >= 0) {
      this.age = newAge;
    }
  }

  // Static method
  static createAnonymous() {
    return new Person('Anonymous', 0);
  }
}

// Inheritance
class Employee extends Person {
  constructor(name, age, jobTitle) {
    super(name, age);
    this.jobTitle = jobTitle;
  }

  work() {
    return `${this.name} is working as ${this.jobTitle}`;
  }
}

// Usage
const person = new Person('John', 25);
const employee = new Employee('Jane', 30, 'Developer');