const proxyConstructor = new Proxy(Intl.DateTimeFormat, {
  get(target, prop) {
    if (prop === "prototype") {
      console.log("1. Prototype accessed");
    }
    return target[prop];
  }
});

try {
  new proxyConstructor("en", { timeZone: "Invalid/Zone" });
} catch (e) {
  console.log("2. Error thrown");
}