Prototype & Prototypal Inheritance

What concept does this code demonstrate?

function Person(name) {
  this.name = name;
}

Person.prototype.getName = function() {
  return this.name;
};

const john = new Person('John');
console.log(john.__proto__ === Person.prototype);
console.log(Person.prototype.__proto__ === Object.prototype);
console.log(Object.prototype.__proto__ === null);

Method inheritance
Property shadowing
The prototype chain
This code demonstrates the prototype chain in JavaScript: 1) john.__proto__ points to Person.prototype, establishing the first link, 2) Person.prototype.__proto__ points to Object.prototype, continuing the chain, 3) Object.prototype.__proto__ is null, indicating the end of the chain, 4) This chain facilitates property lookup when accessing properties not found on the object itself, 5) It shows the linear inheritance path for all JavaScript objects, 6) Though __proto__ is deprecated for direct access, it visually demonstrates the concept (Object.getPrototypeOf() is the standard method). This is the fundamental mechanism behind JavaScript's prototypal inheritance.
Constructor functions

Next Question (10/22)