text: (function() {
    if (typeof window.CustomEvent === 'function') {
      return false;
    }
  
    function CustomEvent(event, params) {
      params = params || { bubbles: false, cancelable: false, detail: undefined };
      const evt = document.createEvent('CustomEvent');
      evt.initCustomEvent(
        event,
        params.bubbles,
        params.cancelable,
        params.detail
      );
      return evt;
    }
  
    CustomEvent.prototype = window.Event.prototype;
  
    window.CustomEvent = CustomEvent;
  })();
  