判断微信和百度钱包客户端

度学金要求只能在微信和钱包客户端打开，其他端或浏览器打开需跳转提示页。

js判断端类型

    var ua = navigator.userAgent.toLowerCase();
    var isweixin = (ua.indexOf("micromessenger") === 0 || ua.indexOf("micromessenger") > 0);
    var iswallet = (ua.indexOf("baiduwallet") === 0 || ua.indexOf("baiduwallet") > 0);
    if (!(iswallet || isweixin)) {
        window.location.href = "/sns/limit";
    }
   
  // 优化
    var isweixin = (~ua.indexOf("micromessenger"));
    var iswallet = (~ua.indexOf("baiduwallet"));