In this chapter, we will showcase the Observer Pattern and the convenient way in which we can utilize it in our pages using jQuery. Later on, we will also explain the Delegated Event Observer Pattern variant, which when properly applied to web pages can lead to code simplifications and also lessen the memory consumption that a page requires.
In this chapter, we will:
Introduce the Observer Pattern
See how the Observer Pattern is used by jQuery
Compare the Observer Pattern with using the event attributes
Learn how to avoid memory leaks from observers
Introduce the Delegated Event Observer Pattern and showcasing its benefits