js查看屏幕长宽

<script type="text/javascript">
console.log("屏幕宽度"+screen.width,"屏幕高度"+screen.height);
console.log("屏幕可用宽度"+screen.availWidth,"屏幕可用高度"+screen.availHeight);
</script>

f12在浏览器控制台显示输出