Join egghead, unlock knowledge.

Want more egghead?

This lesson is for members. Join us? Get access to all 3,000+ tutorials + a community with expert developers around the world.

Unlock This Lesson
Become a member
to unlock all features

Level Up!

Access all courses & lessons on egghead today and lock-in your price for life.


    Know when to extend the Observable class


    The Observable in RxJS is a JavaScript class, and can be extended. In this lesson we will learn about those cases where extending the Observable class becomes a problem, and what cases where it makes sense to extend it.