Add resize event

Hello, can you please trigger resize event after slideUp / slideDown in JS?
Thank you

function triggerResize() {
	if (typeof(Event) === 'function') {
	  // modern browsers
	  window.dispatchEvent(new Event('resize'));
	} else {
	  // for IE and other old browsers
	  // causes deprecation warning on modern browsers
	  var evt = window.document.createEvent('UIEvents');
	  evt.initUIEvent('resize', true, false, window, 0);
	  window.dispatchEvent(evt);
	}
}