/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

'use strict';

let xhr = XMLHttpRequest();
xhr.open("GET", "data:text/plain,ok", true);
xhr.onload = function () {
  postMessage(xhr.responseText);
};
xhr.send(null);