Classes

Classes

Object literals work for single objects, but what if you need to create many objects with the same structure? Classes are blueprints for creating multiple objects of the same type.

Defining a Class

class User {
    // Class body
}

Creating Instances

class User {
    // empty for now
}

var userOne = new User();
var userTwo = new User();

console.log(userOne);  // User {}
console.log(userTwo);  // User {}

The new keyword creates a new instance (object) from the class. Each instance is a separate object.

The Class Analogy

Class = Cookie cutter (blueprint)
Instance = Individual cookie (object)

One class → many instances
Each instance has the same structure but can hold different data

Classes vs Object Literals

Feature	Object Literal	Class
Purpose	One-off objects	Blueprint for many objects
Reusability	Not reusable	Create unlimited instances
Syntax	{ key: value }	class Name { }
Creation	Direct	new ClassName()

Naming Convention

Class names start with an uppercase letter by convention: User, Article, BlogPost. This distinguishes them from regular variables and functions.

Key Takeaways

• Classes are blueprints for creating objects with the same structure
• new ClassName() creates a new instance of the class
• Each instance is a separate object in memory
• Class names use PascalCase by convention