[kevincennis]

Proxies can also be really helpful for unit tests.

Obviously you have things like sinon for stubbing out methods, but they do have to modify the original object, which I don’t think anybody loves.

But you can also wrap your object in a Proxy with handlers that stub certain methods.

You can also use proxies to implement validation and observability on objects. Here’s a very minimal example of a sort of Backbone-esque Model class with proxies: https://gist.github.com/kevincennis/25ba31b2e9f9c8b7a34047ba...