instanceof demo

instanceof.js

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

class Worker extends Person {
  constructor(name, profession) {
    super(name);
    this.profession = profession;
  }
}

const person = new Person('Chris');
const worker = new Worker('Adam', 'Teacher');

console.log('person is an instance of Person?', person instanceof Person);
console.log('person is an instance of Worker?', person instanceof Worker);

console.log('worker is an instance of Person?', worker instanceof Person);
console.log('worker is an instance of Worker?', worker instanceof Worker);