Object

In one line

An object is a collection of key-value pairs that groups related data and functions under a single name.

In simple words

A JavaScript object is a container for named values. Each value is stored under a key (a string or symbol), and you access it with dot notation (user.name) or bracket notation (user["name"]). Objects are the primary way to structure data in JavaScript.

Objects can hold any mix of values: strings, numbers, arrays, even other objects and functions. When a function is stored as an object property, it is called a method. This is how objects model real-world entities — a user object might have name, age, and greet() properties.

You create objects with the literal syntax {} or with new Object(). Modern JavaScript adds features like computed property names, shorthand methods, and destructuring, all of which make working with objects more concise.

Example

javascript

const user = {
  name: "Ada",
  age: 36,
  skills: ["math", "programming"],
  greet() {
    return "Hi, I'm " + this.name;
  },
};

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

user is an object with primitive values, an array, and a method. Access properties with dot notation.