微信浏览器检测

android下的userAgent

mozilla/5.0 (linux; u; android 4.1.2; zh-cn; mi-one plus build/jzo54k) applewebkit/534.30 (khtml, like gecko) version/4.0 mobile safari/534.30 micromessenger/5.0.1.352

ios下的userAgent

mozilla/5.0 (iphone; cpu iphone os 5_1_1 like mac os x) applewebkit/534.46 (khtml, like gecko) mobile/9b206 micromessenger/5.0

javascript 代码：

isWx: function(){
    var ua = navigator.userAgent.toLowerCase();
    if(ua.match(/MicroMessenger/i) && ua.match(/MicroMessenger/i)[0] === "micromessenger") {
        return true;
    } else {
        return false;
    }
}