Class Based Inheritance

class_inheritance.js

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

  display() {
    console.log(this.name, this.age);
  }
}

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

const emp = new Employee('Mike', 20, 4000);
console.log(emp); // { name: 'Mike', age: 20, salary: 4000 }
emp.display(); // Mike 20
console.log(emp.constructor); // Employee