js 检查是否为手机端

let isMobile = function(){
            let userAgentInfo = navigator.userAgent;
            let Agents = new Array("Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod")
            let flag = false;
            for (let v = 0; v < Agents.length; v++) {
                if (userAgentInfo.indexOf(Agents[v]) > 0) { flag = true; break; }
            };
            return flag;
 }();