js判断是在移动端还是在pc端

 function chatQQ3(){
                if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)) {
                       //移动端打开
                        window.location.href = "mqqwpa://im/chat?chat_type=wpa&uin=1694208780&version=1&src_type=web&web_src=oicqzone.com";
                    } else {
                        //pc端打开
                        window.location.href = "tencent://message/?uin=1694208780&Site=qq&Menu=yes";
                    }
            }