Considering Support Proxy?

[xuchiya]

like :
const p = new Proxy(target, handler)

[p-bakker]

Duplicate of #268

[tuchida]

You can do something similar by implementing Scriptable.

var p = new JavaAdapter(org.mozilla.javascript.Scriptable, {
  get(name, start) {
    print(name);
    return this;
  }
});
p.aaa.bbb.ccc;
// aaa
// bbb
// ccc

[p-bakker]

You can do something similar by implementing Scriptable.

Note that when implementing Scriptable.get in JavaScript as suggested, that is the get impl. returns (JavaScript) undefined, the 'proxy' returns null for the gotten property. If you need it to return undefined, the get method should return org.mozilla.javascript.Undefined.SCRIPTABLE_UNDEFINED instead