class People {
  constructor(newname, newage) {
    this.name = newname;
    this.age = newage;
  }
  showname() {
    alert(this.name);
  }
  changename(newname) {
    this.name = newname;
  }
}
const employee1 = new People("Robert", 52);
const employee2 = new People("George", 23);
const employee3 = new People("John", 44);
alert(employee1.name + ", " + employee2.name + ", " + employee3.name); // "Robert, George, John"