systemjs/lib/polyfill-wrapper-end.js

  System.baseURL = __$curScript.getAttribute('data-baseurl') || System.baseURL;

  var configPath = __$curScript.getAttribute('data-config');
  if (configPath === '')
    configPath = System.baseURL + 'config.json';

  var main = __$curScript.getAttribute('data-main');

  (!configPath ? Promise.resolve() :
    Promise.resolve(System.fetch.call(System, { address: configPath, metadata: {} }))
    .then(JSON.parse)
    .then(System.config)
  ).then(function() {
    if (main)
      return System['import'](main);
  })
  ['catch'](function(e) {
    setTimeout(function() {
      throw e;
    })
  });

};

var __$curScript;

(function(global) {
  if (typeof window != 'undefined') {
    var scripts = document.getElementsByTagName('script');
    __$curScript = scripts[scripts.length - 1];

    if (!global.System || global.System.registerModule) {
      // determine the current script path as the base path
      var curPath = __$curScript.src;
      var basePath = curPath.substr(0, curPath.lastIndexOf('/') + 1);
      document.write(
        '<' + 'script type="text/javascript" src="' + basePath + 'es6-module-loader.js" data-init="upgradeSystemLoader">' + '<' + '/script>'
      );
    }
    else {
      global.upgradeSystemLoader();
    }
  }
  else {
    var es6ModuleLoader = require('es6-module-loader');
    global.System = es6ModuleLoader.System;
    global.Loader = es6ModuleLoader.Loader;
    global.Module = es6ModuleLoader.Module;
    module.exports = global.System;
    global.upgradeSystemLoader();
  }
})(__$global);

})(typeof window != 'undefined' ? window : global);