Why is my function proxy not being called in Node?

Question

I was using proxy get method fine. Then I tried using it on a function and quickly realized I needed to use the apply method. This simple example i

Answer 1

You assume here that apply traps work like get traps -- i.e., for any property of the proxied object -- but they do not. The apply trap runs when the Proxy itself is called a function. Here, your proxy is Magic.Foo, but you never call Magic.Foo(). You only call Magic.Foo.runme(), which is not a proxied function.

You must wrap each function whose invocation you wish to intercept in its own individual Proxy wrapper.

Alternatively, you could use a get trap on Magic.Foo that returns a function with the appropriate behavior for each accessed property.

Answer 2

The apply trap only applies to proxies over functions, which create callable objects (i.e. functions). A new Proxy created on a normal object (like your {}) creates a non-callable proxy object, which will never trigger apply.