prototype

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

Person.prototype.greet = function() {
    console.log(`Hello, my name is ${this.name}`);
};

const alice = new Person('Alice');


function Developer(name, language) {
    Person.call(this, name); // Call the parent constructor
    this.language = language;
}

// Inherit from Person
Developer.prototype = Object.create(Person.prototype);
Developer.prototype.constructor = Developer;

Developer.prototype.code = function() {
    console.log(`${this.name} is coding in ${this.language}`);
};

const bob = new Developer('Bob', 'JavaScript');
bob.greet(); // Outputs: Hello, my name is Bob
bob.code(); // Outputs: Bob is coding in JavaScript


console.log(bob.__proto__ === Developer.prototype); // true
console.log(Object.getPrototypeOf(bob) === Developer.prototype); // true

bob.greet = function() {
    console.log(`Hi, I'm ${this.name} and I love ${this.language}`);
};


bob.greet(); // Outputs: Hi, I'm Bob and I love JavaScript