example.js

// core/initializers.js
var global = (function () {
    return this || (0 || eval)('this');
}());

// example.js
(function () {
  "use strict";
  
  // Good.
  var foo = 1 + 1;
  
  // Error.
  bar = 1 + 1;
  
  // Bad. Do not reference the window object.
  window.Module = {};
  
  // Good.
  global.Module = {};
})();