How to trigger the window.resize event on IE8

For the modern browsers it’s easy to fire the window.resize event, but not for IE8…. After several hours of searching, I didn’t find anything.
The only solution I found is the one to resize the HTML that will trigger the event:

function triggerEvent(element, eventName) {
  var event;
  if (document.createEvent) {
    event = document.createEvent("HTMLEvents");
    event.initEvent(eventName, true, true);
  } else {
    event = document.createEventObject();
    event.eventType = eventName;
  }

  event.eventName = eventName;
  if (document.createEvent)
    element.dispatchEvent(event);
  else {
    if (eventName==="resize") {
      var savedWidth=document.documentElement.style.width;
      document.documentElement.style.width="99.999999%";
      setTimeout(function() { document.documentElement.style.width=savedWidth }, 50);
    } else
      element.fireEvent("on" + event.eventType, event);
  }
}
triggerEvent(window,'resize')