Aspect Oriented Javascript, revisited

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Last night I was experimenting a bit with a minimalist implementation of advising in Aspect Oriented Javascript. I implemented the three basic advices (before, around and after). For this naive implementation I slammed the functions in the Object’s prototype. This way I had access to them in all objects in the system.

Here’s how to use them.

The actual code written is very small (20 lines, less if you discount lines taken by braces)

This way you can add any sorts of filters to your JavaScript methods. An enhancement on this would be enabling the removal of these filters once added and to add a filter to all functions of an object (recursively) at once.

Obviously, we need some protection against users trying to advise non function members or even undefined properties for that matter.

 

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