¶BrowserFlags.js

(function(env) {
  function browserVersion(matchFn) {
    var userAgent = jasmine.getGlobal().navigator.userAgent;
    if (!userAgent) { return void 0; }

    var match = matchFn(userAgent);

    return match ? parseFloat(match[1]) : void 0;
  }

  env.ieVersion = browserVersion(function(userAgent) {
    return /MSIE ([0-9]{1,}[\.0-9]{0,})/.exec(userAgent);
  });

  env.safariVersion = browserVersion(function(userAgent) {
    return /Safari/.exec(userAgent) && /Version\/([0-9]{0,})/.exec(userAgent);
  });

  env.firefoxVersion = browserVersion(function(userAgent) {
    return /Firefox\/([0-9]{0,})/.exec(userAgent);
  });

})(jasmine.getEnv());