Best way to pass object with Reference

[iCyberon]

What's the best way to pass objects to isolate that contain Reference.

const ivm = require('isolated-vm');
const isolate = new ivm.Isolate({ memoryLimit: 128 });

const context = isolate.createContextSync();
const globalReference = context.globalReference();

const obj = {
  a: 1,
  b: 2,
  c: new ivm.Reference(function() {})
}

globalReference.setSync('obj', new ivm.ExternalCopy(obj).copyInto());

let r = isolate.compileScriptSync('obj.a + obj.b').runSync(context);
console.log(r);

This gives an error:

#<Reference> could not be cloned.

As I understand Reference can't be passed to ExternalCopy. What's the best way to transfer objects that contain functions?

[laverdet]

Right now you would have to do this manually for each object you want to pass:

global.setSync('obj', new ivm.ExternalCopy({}).copyInto());
let obj = global.getSync('obj');
obj.setSync('c', new ivm.Reference(function() {}));
// ... more

You could also call a function with an array of references using apply or applySync.

I'm going to keep this open because I think it may be possible to allow references in deep copies in the future.