//listen for window resize event
window.addEventListener('resize', function(event){
var newWidth = window.innerWidth;
var newHeight = window.innerHeight;
});window.addEventListener("resize", () => {
// CODE
});// Cross-browser solution (IE support)
var resizeEvent = window.document.createEvent('UIEvents');
resizeEvent.initUIEvent('resize', true, false, window, 0);
window.dispatchEvent(resizeEvent);//PUT IN YOUR BROWNSER'S CONSOLE OR CODE "OnCLick()"
javascript:(function(){window.open(document.URL, '','width=320,height=480');})();window.dispatchEvent(new Event('resize'));window.addEventListener('resize', functionName);