Object Methods in JavaScript

Object methods are functions stored as properties on objects. They can access and modify the object using the this keyword.

🛠 Defining Methods

const user = {
    name: "Alice",
    greet: function() {
        return "Hello, " + this.name;
    }
};

console.log(user.greet()); // "Hello, Alice"

⚡ ES6 Method Shorthand

const user = {
    name: "Bob",
    greet() {
        return `Hi, I'm ${this.name}`;
    }
};

console.log(user.greet()); // "Hi, I'm Bob"

📦 Adding Methods Dynamically

user.sayBye = function() {
    return `${this.name} says goodbye.`;
};

console.log(user.sayBye()); // "Bob says goodbye."

🔁 Using this in Methods

The this keyword refers to the object the method belongs to.

const car = {
    brand: "Tesla",
    model: "Model 3",
    info() {
        return `${this.brand} - ${this.model}`;
    }
};

console.log(car.info()); // "Tesla - Model 3"

📚 Built-in Object Methods

• Object.keys(obj) – Returns an array of property names
• Object.values(obj) – Returns an array of property values
• Object.entries(obj) – Returns an array of [key, value] pairs
• Object.assign(target, source) – Copies properties
• Object.freeze(obj) – Makes object immutable

const obj = { a: 1, b: 2 };

console.log(Object.keys(obj));   // ["a", "b"]
console.log(Object.values(obj)); // [1, 2]