BackedProxy.es

class BackedProxy {
  static DEBUG = true;
  static WRAPPED = Symbol('Wrapped Objects accessor.');
  static make = (obj, origObj) => new Proxy(obj, {
    get(obj, prop, receiver) {
      if (prop === BackedProxy.WRAPPED) return {obj, origObj};
      if (BackedProxy.DEBUG) {
        console.log(`get ${prop.toString()})`)
      }
      const value = prop in obj ? obj[prop] : origObj[prop]
      if (value instanceof Function) {
        return function (...args) {
          return value.apply(this === receiver ? obj : this, args);
        };
      }
      return value;
    },
    set(obj, prop, value, receiver) {
      if (BackedProxy.DEBUG) {
        console.log(`set ${prop.toString()})`)
      }
      if (prop in obj) {
        obj[prop] = value;
        return true;
      } else if (prop in origObj) {
        origObj[prop] = value;
        return true;
      }
      return false;
    }
  })
}

window.BackedProxy = BackedProxy;