JS识别安卓还是ios苹果、识别是否微信内置浏览器、手机类型

/**
* [isMobile 判断平台]
* @param test: 0:iPhone    1:Android
*/
function ismobile(test) {
  var u = navigator.userAgent,
   app = navigator.appVersion
  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 (/iPhone|mac|iPod|iPad/i.test(navigator.userAgent)) {
          return "0:苹果";
        } else {
          return "1:安桌";
        }
      } catch (e) { 
  //            alert(e);
      }
    }
  } else if (app.indexOf("iPad") > -1|| app.indexOf("iPhone") > -1) {
     return "0:苹果";
  } else {
    return "1:安桌";
         
  }
};

ismobile(1)

function isWeiXin() {
    var ua = window.navigator.userAgent.toLowerCase();
//          console.log(ua);//mozilla/5.0 (iphone; cpu iphone os 9_1 like mac os x) applewebkit/601.1.46 (khtml, like gecko)version/9.0 mobile/13b143 safari/601.1
    if (ua.match(/MicroMessenger/i) == "micromessenger") {
        return true;
    } else {
        return false;
    }
}

function judgeBrand(sUserAgent) {
//      var isIphOne= sUserAgent.match(/iphone/i) == "iphone";
  var isHuawei = sUserAgent.match(/huawei/i) == "huawei";
  var isHOnor= sUserAgent.match(/honor/i) == "honor";
  var isOppo = sUserAgent.match(/oppo/i) == "oppo";
  var isOppoR15 = sUserAgent.match(/pacm00/i) == "pacm00";
  var isVivo = sUserAgent.match(/vivo/i) == "vivo";
  var isXiaomi = sUserAgent.match(/mis/i) == "mi ";
  var isXiaomi2s = sUserAgent.match(/mixs/i) == "mix ";
  var isRedmi = sUserAgent.match(/redmi/i) == "redmi";
  var isSamsung = sUserAgent.match(/sm-/i) == "sm-";
  var isMeizu = sUserAgent.match(/meizu/i) == "meizu";
​
//      if (isIphone) {
//        return "iphone";
//      } else
  
  if (isHuawei || isHonor) {
    return "huawei";
  } else if (isOppo || isOppoR15) {
    return "oppo";
  } else if (isVivo) {
    return "vivo";
  } else if (isXiaomi || isRedmi || isXiaomi2s) {
    return "xiaomi";
  } else if (isSamsung) {
    return "samsung";
  } else if (isMeizu) {
    return "meizu";
  } else {
    return "";
  }
}
var brand = judgeBrand(navigator.userAgent.toLowerCase());