screen width finder

javascript: let width = screen.width; let height = screen.height; (function () { var screen = document.createElement('div'); var body = document.getElementsByTagName('body')[0]; body.appendChild(screen); screen.style.position = 'fixed'; screen.style.top = '0px'; screen.style.right = '0px'; screen.style.margin = '10px'; screen.style.paddingTop = '10px'; screen.style.width = '200px'; screen.style.height = '60px'; screen.style.zIndex = 10000; screen.style.opacity = 1; screen.style.color = 'white'; screen.style.backgroundColor = 'black'; screen.style.border = '4px solid white'; screen.style.textAlign = 'center'; screen.style.cursor = 'pointer'; screen.id = 'screen'; screen.style.display = 'block'; screen.innerText = 'your screen width is '+width+'x'+height+''; }()); function update(){ width = screen.width; height = screen.height; screen.innerText = 'your screen width is '+width+'x'+height+''; } setInterval(update,5);