webcomponentsjs/src/CustomElements/CustomElements.js

/**
 * @license
 * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */
(function() {

// Establish polyfill scope. We do this here to store flags. Flags are not
// supported in the build.
window.CustomElements = window.CustomElements || {flags:{}};

// Flags. Convert url arguments to flags
var flags = {};
if (!flags.noOpts) {
  location.search.slice(1).split('&').forEach(function(option) {
    var parts = option.split('=');
    var match;
    if (parts[0] && (match = parts[0].match(/wc-(.+)/))) {
      flags[match[1]] = parts[1] || true;
    }
  });
}


// Load.
var file = 'CustomElements.js';

var modules = [
  '../WeakMap/WeakMap.js',
  '../MutationObserver/MutationObserver.js',
  'base.js',
  'traverse.js',
  'observe.js',
  'upgrade.js',
  'register.js',
  'boot.js'
];

var src =
  document.querySelector('script[src*="' + file + '"]').getAttribute('src');
var basePath = src.slice(0, src.indexOf(file));

modules.forEach(function(f) {
  document.write('<script src="' + basePath + f + '"></script>');
});

// exports
CustomElements.flags = flags;

})();