利用navigator对象判断设备类型

 function getTerminalType() {
     //获取navigator对象
     var o = navigator.userAgent,
         t = "";
     if (/\biPhone\b|\biPad\b/.test(o) && !/android/i.test(o)) {
         t = "ios";
     } else if (/android/i.test(o)) {
         t = "android";
     } else if (/windows/i.test(o)) {
         t = "windows";
     }
     console.log(t);
     return t;
 }

从百度js中提取