os.js

function os(si) {
  let ua = navigator.userAgent;
  let osName;
  let clientStrings = [
    { s: 'Windows 10', r: /(Windows 10.0|Windows NT 10.0)/ },
    { s: 'Windows 8.1', r: /(Windows 8.1|Windows NT 6.3)/ },
    { s: 'Windows 8', r: /(Windows 8|Windows NT 6.2)/ },
    { s: 'Windows 7', r: /(Windows 7|Windows NT 6.1)/ },
    { s: 'Windows Vista', r: /Windows NT 6.0/ },
    { s: 'Windows Server 2003', r: /Windows NT 5.2/ },
    { s: 'Windows XP', r: /(Windows NT 5.1|Windows XP)/ },
    { s: 'Windows 2000', r: /(Windows NT 5.0|Windows 2000)/ },
    { s: 'Windows ME', r: /(Win 9x 4.90|Windows ME)/ },
    { s: 'Windows 98', r: /(Windows 98|Win98)/ },
    { s: 'Windows 95', r: /(Windows 95|Win95|Windows_95)/ },
    { s: 'Windows NT 4.0', r: /(Windows NT 4.0|WinNT4.0|WinNT|Windows NT)/ },
    { s: 'Windows CE', r: /Windows CE/ },
    { s: 'Windows 3.11', r: /Win16/ },
    { s: 'Android', r: /Android/ },
    { s: 'Open BSD', r: /OpenBSD/ },
    { s: 'Sun OS', r: /SunOS/ },
    { s: 'Chrome OS', r: /CrOS/ },
    { s: 'Linux', r: /(Linux|X11(?!.*CrOS))/ },
    { s: 'iOS', r: /(iPhone|iPad|iPod)/ },
    { s: 'Mac OS X', r: /Mac OS X/ },
    { s: 'Mac OS', r: /(Mac OS|MacPPC|MacIntel|Mac_PowerPC|Macintosh)/ },
    { s: 'QNX', r: /QNX/ },
    { s: 'UNIX', r: /UNIX/ },
    { s: 'BeOS', r: /BeOS/ },
    { s: 'OS/2', r: /OS\/2/ },
    { s: 'Search Bot', r: /(nuhk|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask Jeeves\/Teoma|ia_archiver)/ }
  ];
  for (let id in clientStrings) {
    let cs = clientStrings[id];
    if (cs.r.test(ua)) {
      osName = cs.s;
      break;
    }
  }

  let osVersion;

  if (/Windows/.test(osName)) {
    osVersion = /Windows (.*)/.exec(osName)[1];
    osName = 'Windows';
  }

  switch (osName) {
    case 'Mac OS':
    case 'Mac OS X':
    case 'Android':
      osVersion = /(?:Android|Mac OS|Mac OS X|MacPPC|MacIntel|Mac_PowerPC|Macintosh) ([\.\_\d]+)/.exec(ua)[1];
      break;

    case 'iOS':
      osVersion = /OS (\d+)_(\d+)_?(\d+)?/.exec(appVersion);
      osVersion = osVersion[1] + '.' + osVersion[2] + '.' + (osVersion[3] | 0);
      break;
  }

  si['os.language'] = navigator.language;
  si['os.name'] = osName;
  si['os.version'] = osVersion;
}