prototypal.js

class Person {
  constructor(firstName, lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
  }
  toString() {
    return `Name: ${this.firstName} ${this.lastName}`;
  }
  get fullName() {
    return `${this.firstName} ${this.lastName}`;
  }
  get lastName() {
    return this._lastName;
  }
  set lastName(value) {
    this._lastName = value;
  }
}

class ReputablePerson extends Person {
  constructor(firstName, lastName, rating) {
    super(firstName, lastName);
    this.rating = rating;
  }
  toString() {
    return `${super.toString()} Rating: ${this.rating}`;
  }
  get fullName() {
    return `Reputed ${this.lastName}, ${super.fullName}`;
  }
}

const printPrototypeHierarchy = function (instance) {
  if (instance !== null) {
    console.log(instance);
    printPrototypeHierarchy(Reflect.getPrototypeOf(instance));
  }
};

const alan = new ReputablePerson("Alan", "Turing", 5);
printPrototypeHierarchy(alan);

class ComputerWiz {}

Reflect.setPrototypeOf(Reflect.getPrototypeOf(alan), ComputerWiz.prototype);
console.log("...after change of prototpye...");
printPrototypeHierarchy(alan);

const ada = new ReputablePerson("Ada", "Lovelace", 5);
printPrototypeHierarchy(ada);