js 判断为手机浏览器高度

function isMobile() {
    var userAgentInfo = navigator.userAgent;
    var mobileAgents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
    var isMobileDevice = false;
    for (var i = 0; i < mobileAgents.length; i++) {
        if (userAgentInfo.indexOf(mobileAgents[i]) > -1) {
            isMobileDevice = true;
            break;
        }
    }
    return isMobileDevice;
}

function getViewportHeight() {
    return window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
}

if (isMobile()) {
    console.log("这是手机浏览器");
    var viewportHeight = getViewportHeight();
    console.log("视口高度为：" + viewportHeight + "px");
} else {
    console.log("这不是手机浏览器");
}