Omegle timestamps

// ==UserScript==
// @name Omegle timestamps
// @version 0
// @match *://*.omegle.com/
// @grant unsafeWindow
// ==/UserScript==

function win() {
  try {
    return unsafeWindow;
  } catch (e) {
    return window;
  }
}

function wrap(fun) {
  try {
    return exportFunction(fun, unsafeWindow);
  } catch (e) {
    return fun;
  }
}

function clone(obj) {
  try {
    return cloneInto(obj, unsafeWindow);
  } catch (e) {
    return obj;
  }
}

function begin() {
  let window = win();
  if (!window.Element)
    setTimeout(begin, 1000);

  if (!window.Timestamp$Element)
    window.Timestamp$Element = window.Element;

  window.Element = wrap(function (a, b) {
    let clonedB = b && clone(b);
    let elem = window.Timestamp$Element(a, clonedB);

    if (typeof a == "string" && b && (b["class"] == "youmsg" || b["class"] == "strangermsg")) {
      let stamp = new window.Timestamp$Element("span", clone({"class": "timestamp"}));
      stamp.appendText(new Date().toISOString().replace(/T|\..*|Z/g, " "));
      elem.grab(stamp);
    }
    return elem;
  });

  Object.assign(window.Element, window.Timestamp$Element);
}

begin();