Observer Pattern

The video tutorial explains the observer pattern, a design pattern that allows objects to subscribe and unsubscribe to events. It demonstrates how to implement this pattern using JavaScript prototypes and ES6 classes. The tutorial includes building a simple UI with buttons to subscribe and unsubscribe to events, and testing the functionality. The video concludes with a refactoring of the code to use ES6 classes, highlighting the syntactic sugar they provide over traditional prototypes.

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