if (device.windows()) { console.log("windows 3") function resizeVideo() { console.log('resizing') var video = document.querySelector('.video-bg') if (window.innerWidth > window.innerHeight) { video.setAttribute('style', 'width: 100%; height:auto;') } else { video.setAttribute('style', 'width: auto; height:100%;') } } window.addEventListener('onload', function(){ console.log('onload', window.innerWidth, window.innerHeight) resizeVideo() }) window.addEventListener('load', function(){ console.log('onload', window.innerWidth, window.innerHeight) resizeVideo() }) window.addEventListener('resize', resizeVideo) } else { console.log("not windows 3") }