December 2015
Intermediate to advanced
240 pages
4h 57m
English
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Chapter 7. Observer Design Pattern
In this chapter, you will learn about the observer pattern in JavaScript. We will see its advantages, disadvantages, usage, and so on. We will see different faces of observer pattern and its use with the help of observer and subject class. We will also see how we can optimize code using the observer pattern.
Overview
The observer pattern defines a relationship between more than one object where one object is observed by many others. The system is designed in such a way that when a state of the observed object is changed, all observing objects get notified automatically. This pattern is also known as dependents and pub/sub (publication/subscription).
Mainly people like to use the observer pattern in JavaScript, and ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.