JS Tutorial

JS OBJECTS

JavaScript Objects

In JavaScript, an object is a collection of key-value pairs. It’s used to store multiple values in a single variable, like a real-world entity with properties and behaviors.

🔹 Real Life Analogy: A car object can have properties like brand, model, color and methods like drive(), brake().

📦 Creating an Object


let person = {

    name: "John",

    age: 30,

    isStudent: false

};

🔍 Accessing Object Properties

person.name – Dot notation
person["age"] – Bracket notation


console.log(person.name);

console.log(person["age"]);

🛠️ Adding & Updating Properties


person.country = "India";

person.age = 31;

🧹 Deleting Properties


delete person.isStudent;

⚙️ Object Methods

You can define functions inside objects:


let user = {

    name: "Alice",

    greet: function() {

        return "Hello, " + this.name;

    }

};

console.log(user.greet());

🧪 Try It Yourself

Output will appear here

📘 Summary:
JavaScript objects are powerful for structuring data using keys and values. You can store data and behavior together using properties and methods.

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