js 实时监听移动端横竖屏

window.addEventListener("onorientationchange" in window ? "orientationchange" : "resize", function() { if (window.orientation === 180 || window.orientation === 0) { alert('竖屏状态！'); //做相对应的处理 } if (window.orientation === 90 || window.orientation === -90 ){ alert('横屏状态！'); //做相对应的处理 } }, false);