text: /*
  * required polyfills
  */
  
  /** IE9, IE10 and IE11 requires all of the following polyfills. **/
  // import 'core-js/es6/symbol'
  // import 'core-js/es6/object'
  // import 'core-js/es6/function'
  // import 'core-js/es6/parse-int'
  // import 'core-js/es6/parse-float'
  // import 'core-js/es6/number'
  // import 'core-js/es6/math'
  // import 'core-js/es6/string'
  // import 'core-js/es6/date'
  import 'core-js/es6/array';
  // import 'core-js/es6/regexp'
  import 'core-js/es6/map';
  // import 'core-js/es6/weak-map'
  import 'core-js/es6/set';
  import 'core-js/es7/object';
  
  /** IE10 and IE11 requires the following for the Reflect API. */
  // import 'core-js/es6/reflect'
  /** Evergreen browsers require these. **/
  // Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove.
  // import 'core-js/es7/reflect'
  // CustomEvent() constructor functionality in IE9, IE10, IE11
  (function () {
    if ( typeof window.CustomEvent === "function" ) return false
  
    function CustomEvent ( event, params ) {
      params = params || { bubbles: false, cancelable: false, detail: undefined }
      var evt = document.createEvent( 'CustomEvent' )
      evt.initCustomEvent( event, params.bubbles, params.cancelable, params.detail )
      return evt
    }
  
    CustomEvent.prototype = window.Event.prototype
  
    window.CustomEvent = CustomEvent
  })();
  