JS 判断手机当前是横屏还是竖屏

orientation官方文档

function rotate() {if (window.orientation == 180 || window.orientation == 0) {alert('竖屏')}if (window.orientation == 90 || window.orientation == -90) {alert('横屏')}}window.addEventListener("load", rotate, false);window.addEventListener("onorientationchange" in window ? "orientationchange" : "resize", rotate, false);