Object-Oriented JavaScript

ES6 Classes and Beyond

0:00

0% complete

LearnStep 1 of 3

Modern JavaScript Classes

Learning Objectives

•Understand the class syntax and constructor method in JavaScript
•Implement data encapsulation using private class fields (#)
•Use getters and setters to control access to class properties
•Define and invoke static methods and properties for utility functions

Lesson Outline

LearnStep 1/3

Modern JavaScript Classes

ES6 introduced the class keyword, providing a cleaner, more familiar syntax for creating objects and dealing with inheritance. While it's primarily syntactic sugar over JavaScript's existing prototype-based inheritance, modern features like private fields make it powerful.

Basic Syntax

A class is defined with the class keyword and a constructor method.

javascript

Private Fields

Fields starting with # are private to the class and cannot be accessed from outside.

javascript

Getters and Setters

Use get and set to intercept property access.

javascript

Static Members

static methods belong to the class itself, not instances.

javascript