The Decorator Pattern for JavaScript

The Decorator Pattern for JavaScript

• Run actsAsDecorator() on any object.
• This object will now have a before() and after() method that work like this:
  o object.before(‘somethingHappens’, function() { });
  o object.after(‘someMethodGetsCalled’, function() { });
• Now, whenever you call object.somethingHappens(), the function you passed in will be called before the original function runs.
• Similarly, whenever object.someMethodGetsCalled gets called, that other function you passed in will be executed afterwards.

Just remember: before(‘method’, function() { }); after(‘method’, function() { });