【JS】手机屏幕旋转判断

function readDeviceOrientation() {
                         
        if (Math.abs(window.orientation) === 90) {
            // Landscape
            alert(\'横屏\');
        } else {
            // Portrait
            alert(\'竖屏\');
        }
    }

    window.onorientationchange = readDeviceOrientation;