What Is a Class?

In this lesson, you’ll learn how to create a Class, which is the first step in Object-Oriented Programming.

To define a class in JavaScript, use the class keyword, give the class a name, and place its body inside curly braces ({}).

class Car {}

That’s all it takes to create an empty class.

Choosing a Class Name

After the class keyword, you provide a name for the class.

By convention, class names start with a capital letter, following the PascalCase naming style.

Examples include:

Car
MyCar
CarModel
ElectricCar

You may choose any valid name as long as it is not a reserved keyword in the language.

Curly Braces

Curly braces ({}) are required when defining a class, even if the class doesn’t contain any code yet.

If you omit them, the JavaScript parser cannot recognize the class definition correctly, resulting in a syntax error.

Key Takeaways

• Use the class keyword to define a new class.
• By convention, class names use PascalCase.
• A class can have any valid name that is not a reserved keyword.
• Curly braces ({}) are always required, even for an empty class.