How to get the target of a JavaScript Proxy?

Question

function createProxy() {
    const myArray = [Math.random(), Math.random()];
    return new Proxy(myArray, {});
}

const myProxy = createProxy();

H

Answer 1

Like the other answers already said a proxy get trap can be an elegant solution.

const IDENTITY = Symbol('proxy_target_identity')
const handler = {
  get: (target, property, receiver) => {
    if (property === IDENTITY && !target.hasOwnProperty(IDENTITY)) { // missing '!'
      return target
    }
    return Reflect.get(target, property, receiver)
  }
}
function createProxy() {
    const myArray = [Math.random(), Math.random()];
    return new Proxy(myArray, handler);
}
const myProxy = createProxy();
const orignal_target = myProxy[IDENTITY]

This code sample should be quite robust as it:

• avoids property name conflicts by using a Symbol
• covers all get-scenarios by using Reflect.get instead of target[property]
• works with prototype-inheritance - in case your proxy ends up being used as a prototype your inheritee will not return itself despite never being actually proxied itself.