62. Introduction to Objects

Objects are the foundation of complex data structures in JavaScript. Unlike arrays, which use numbered indices, objects store data as properties in unordered key-value pairs.

Defining Objects (Object Literals)

Objects are created using curly braces {}.

javascript const user = { // key: value, firstName: 'Jane', lastName: 'Doe', age: 30, isLoggedIn: true, 'favorite color': 'blue' // Keys can be strings with spaces };

const emptyObject = {};

Properties and Methods

• A property holds a piece of data (e.g., age: 30).
• A method is a property whose value is a function (used to perform an action related to the object, covered soon).