JS 判断设备 检查手机系统 检测系统

if (
  /AppleWebKit.*Mobile/i.test(navigator.userAgent) ||
  /MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(
    navigator.userAgent
  )
) {
  if (window.location.href.indexOf("?mobile") < 0) {
    try {
      if (/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)) {
        window.location.href = "../m/index.html";
      } else if (/iPad/i.test(navigator.userAgent)) {
        //ipad
      } else {
        // 其他
      }
    } catch (e) {}
  }
}

function getPgjs() {
  var agent = navigator.userAgent.toLowerCase();
  var res = agent.match(/android/);
  if (res == "android") return res;
  res = agent.match(/iphone/);
  if (res == "iphone") return "ios";
  res = agent.match(/ipad/);
  if (res == "ipad") return "ios";
  res = agent.match(/windows/);
  if (res == "windows") return "wp";
  return "pc";
}