Mixins, Forwarding, and Delegation in JavaScript

Very my much impression. What you can abuse JS to do is impressive and I would never ever want to maintain a codebase that used these tricks.

I had the opposite reaction. For me this is why I love JavaScript. It makes things I want to do in C++, C#, etc simple and easy.

Meta-programming is almost always scary looking regardless of language. But once written well using it is generally easy and I can ignore it and get back to work.

You can't avoid dealing with javascript when doing web development. Before you mention something like coffeescript, I have to say first that the mixin, forwarding and delegating code were only several lines long. Compare that to the amount of code used to compile to javascript.

Agreed. Generally I would argue against combining data and behaviour, for the very same reasons that the author wrote these abstractions.

However, I think there are better methods available. For example I would much prefer to organise related behaviour using Node modules (using Browserify if it’s a client app), which give you an extremely understandable way to group related behaviour AND hide private state.