js获取计算机操作系统版本

如题，想要获取当先计算机的操作系统和版本号的话，可以用如下方法。

首先，创建osversion.js文件，文件里面的代码如下

 var osData = [
       { name: 'Windows 2000',           group: 'windows_server',      identifier: 'Windows NT 5.0',                     version: '5.0' },
       { name: 'Windows XP',             group: 'windows',         identifier: 'Windows NT 5.1',                     version: '5.1' },
       { name: 'Windows 2003',           group: 'windows_server',      identifier: 'Windows NT 5.2',                     version: '5.2' },
       { name: 'Windows Vista',          group: 'windows',       identifier: 'Windows NT 6.0',                     version: '6.0' },
       { name: 'Windows 7',              group: 'windows',       identifier: 'Windows NT 6.1',                     version: '7.0' },
       { name: 'Windows 8',              group: 'windows',       identifier: 'Windows NT 6.2',                     version: '8.0' },
       { name: 'Windows 8.1',            group: 'windows',       identifier: 'Windows NT 6.3',                     version: '8.1' },
       { name: 'Windows 10',             group: 'windows',       identifier: 'Windows NT 10.0',                    version: '10.0' },
       { name: 'Windows 2008',           group: 'windows_server',    identifier: 'Windows NT 6.0; WOW64',                     version: '6.0' },
       { name: 'Windows 2008',           group: 'windows_server',    identifier: 'Windows NT 6.1; WOW64',                     version: '6.1' },
       { name: 'Windows 2012',           group: 'windows_server',    identifier: 'Windows NT 6.3; Win64',                     version: '6.3' },
       { name: 'Chrome OS',              group: 'windows',      identifier: 'CrOS'                               },
       { name: 'Mac OS X Capitan',       group: 'mac',        identifier: 'Mac OS X (10([_|\.])11([0-9_\.]*))', versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Yosemite',      group: 'mac',        identifier: 'Mac OS X (10([_|\.])10([0-9_\.]*))', versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Mavericks',     group: 'mac',        identifier: 'Mac OS X (10([_|\.])9([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Mountain Lion', group: 'mac',        identifier: 'Mac OS X (10([_|\.])8([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Lion',          group: 'mac',        identifier: 'Mac OS X (10([_|\.])7([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Snow Leopard',  group: 'mac',        identifier: 'Mac OS X (10([_|\.])6([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Leopard',       group: 'mac',        identifier: 'Mac OS X (10([_|\.])5([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Tiger',         group: 'mac',        identifier: 'Mac OS X (10([_|\.])4([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Panther',       group: 'mac',        identifier: 'Mac OS X (10([_|\.])3([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Jaguar',        group: 'mac',        identifier: 'Mac OS X (10([_|\.])2([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Puma',          group: 'mac',        identifier: 'Mac OS X (10([_|\.])1([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS X Cheetah',       group: 'mac',        identifier: 'Mac OS X (10([_|\.])0([0-9_\.]*))',  versionSeparator: '[_|\.]' },
       { name: 'Mac OS',                 group: 'mac',        identifier: 'Mac OS'                              },
       { name: 'Ubuntu',                 group: 'linux_server',         identifier: 'Ubuntu',                             versionIdentifier: 'Ubuntu/([0-9\.]*)' },
       { name: 'CentOs',                 group: 'linux_server',         identifier: 'CentOs',                             versionIdentifier: 'CentOs/([0-9\.]*)' },
       { name: 'Debian',                 group: 'linux_server',         identifier: 'Debian'                             },
       { name: 'Gentoo',                 group: 'linux_server',         identifier: 'Gentoo'                             },
       { name: '国产系统',               group: 'linux',         identifier: 'Linux'                              }
 ];

 var setOsData = function(os) {
   var userAgent = navigator.userAgent.toLowerCase();
   // Check browser type
   for (i in osData) {
       if (osData.hasOwnProperty(i)){
         var osRegExp = new RegExp(osData[i].identifier.toLowerCase());
         var osRegExpResult = osRegExp.exec(userAgent);

         if (osRegExpResult != null) {
             os.name = osData[i].name;
             os.group = osData[i].group;
             break;
         }
       }
   }

   return true;
 };

 var setOsVersion = function(os,version, separator) {
   if (separator.substr(0, 1) == '[') {
       var splitVersion = version.split(new RegExp(separator, 'g'), 2);
   } else {
       var splitVersion = version.split(separator, 2);
   }

   if (separator != '.') {
       version = version.replace(new RegExp(separator, 'g'), '.');
   }

   os.fullVersion = version;

   // Major version
   if (splitVersion[0]) {
       os.majorVersion = parseInt(splitVersion[0]);
   }

   // Minor version
   if (splitVersion[1]) {
       os.minorVersion = parseInt(splitVersion[1]);
   }

   return true;
 };

然后在HTML里添加如下代码：

<script src="js/osversion.js"></script>
<script>
    var os = {};
    setOsData(os);
    alert(os.name);
</script>

我们来访问呢一下看下效果：

弹出来Windows 10，我的计算机的操作系统版本就是这个。