ES6 Proxy Like Property Accessor

[ljamesjr85]

I'm asking this question a little out of ignorance about how performant or not performant the ES6 proxy is. But is there any sort of mechanism to assign a c++ method to be called when an undefined* property or index is used from JS?

*undefined - meaning not part of the prototype created by "DefineClass" or added to the instance of the class when its instantiated.

The ES6 Proxy would more than suffice for what I want to do. However based on some testing I've seen people online do, it seems like there is a noticeable slow down when you use a proxy. I am not really concerned about how performant it would be for small use cases. But what I am building could potentially access and iterate over 10s-100s of millions of properties that really only exist on a wrapped object. So if I can get some efficiency out of writing an addon class I would rather do that than use a proxy.

[KevinEady]

Hi @ljamesjr85 ,

I think your concern remotely relates to #1114. Unfortunately there is no Node-API to achieve what you are trying to accomplish. I think the Proxy method is the only way. Take a look at the thread and see the conversation for some details.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[mhdawson]

I'm going to close this as answered. Please let us know if that was not the right thing to do.