判断是android 还是 ios

 // 判断是安卓还是ios
    appSource() {
      const u = navigator.userAgent;
      const isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
      if (isiOS) {
        return "ios";
      } else {
        return "android";
      }
    },

//判断是微信还是微博
let ua = navigator.userAgent.toLowerCase();

//判断是不是微信浏览器
let isweixin = ua.match(/MicroMessenger/i) == "micromessenger";


//判断是不是微博浏览器
let isweibo = ua.match(/WeiBo/i) == "weibo";