Register to get access to free programming courses with interactive exercises

About JS: Dive into Classes

JavaScript, like other class-based programming languages, emphasizes the importance of class organization. Its purpose is to enhance code reusability (which may not be necessary if the language doesn't have classes) and minimize errors.

While this is a helpful approach, the numerous possibilities for implementation can make it challenging because we can achieve one goal in multiple ways. The variety of techniques has led to the creation of different schools and methods of writing code as when to use inheritance and the Liskov principle.

This course will delve into the class organization and explore the concept of inheritance. You'll learn how to construct effective class hierarchies with the help of the Liskov substitution principle. Additionally, you'll discover why using inheritance is generally discouraged (despite its popularity due to ease of use) and why composition is a better alternative.

Inheritance involves unique design patterns that emerge, and its usage impacts polymorphic code, although it's not a requirement. We will study this aspect separately.

Lastly, we will introduce you to an exciting concept known as mixins.


Are there any more questions? Ask them in the Discussion section.

The Hexlet support team or other students will answer you.

About Hexlet learning process

For full access to the course you need a professional subscription.

A professional subscription will give you full access to all Hexlet courses, projects and lifetime access to the theory of lessons learned. You can cancel your subscription at any time.

Get access
130
courses
1000
exercises
2000+
hours of theory
3200
tests

Sign up

Programming courses for beginners and experienced developers. Start training for free

  • 130 courses, 2000+ hours of theory
  • 1000 practical tasks in a browser
  • 360 000 students
By sending this form, you agree to our Personal Policy and Service Conditions

Our graduates work in companies:

Bookmate
Health Samurai
Dualboot
ABBYY
Suggested learning programs
profession
Development of front-end components for web applications
10 months
from scratch
Start at any time

Use Hexlet to the fullest extent!

  • Ask questions about the lesson
  • Test your knowledge in quizzes
  • Practice in your browser
  • Track your progress

Sign up or sign in

By sending this form, you agree to our Personal Policy and Service Conditions
Toto Image

Ask questions if you want to discuss a theory or an exercise. Hexlet Support Team and experienced community members can help find answers and solve a problem.