Class in ES6

employee.js

class Person {
  constructor(name){
    this.name = name;
  }
}
class Employee extends Person {
  
  constructor(id, name){
    super(name);
    this.id = id;
  }
  
  static type(){
    return 'Employee';
  }
  
  toString(){
    return `Employee: id = ${this.id}, name = ${this.name}`;
  }
  
}

let e = new Employee(1, 'Prasanna');
console.log(e.toString());
console.log(Employee.type());
// "Employee: id = 1, name = Prasanna"
// "Employee"