image.png
function Person(firstname, lastname) {
this.firstname = firstname;
this.lastname = lastname;
}
Person.prototype.greet = function() {
console.log('Hello, ' + this.firstname + ' ' + this.lastname);
};
var john = new Person('John', 'Doe');
john.greet();
var jane = new Person('Jane', 'Doe');
jane.greet();
console.log(john.__proto__);
console.log(jane.__proto__);
console.log(john.__proto__ === jane.__proto__);
