js通过判断h5页面是否内嵌在app内

// 通过ua标识判断
var userAgent = navigator.userAgent.toLowerCase();//获取UA信息
if(userAgent.indexOf("ezhouxing") != -1){//判断ua中是否含有和app端约定好的标识ezhouxing
        alert('包含');
    }

function urlParse (queryStr) {
        let arr = queryStr.slice(1).split('&');
        let map = {};
        arr.forEach(item => {
          let param = item.split('=');
          map[param[0]] = param[1];
        });
        return map;
      }
if (urlParse(window.location.search).app === "app") {
        isApp = true //客户端调用
} else {
        isApp = false //非客户端调用
}