YUI user agent detection. Do not fork for a browser if it can be avoided. Use feature detection when you can. Use the user agent as a last resort. For all fields listed as @type float, UA stores a version number for the browser engine, 0 otherwise. This value may or may not map to the version number of the browser using the engine. The value is presented as a float so that it can easily be used for boolean evaluation as well as for looking for a particular range of versions. Because of this, some of the granularity of the version info may be lost. The fields that are @type string default to null. The API docs list the values that these fields can have.
compareVersionsa
b
Performs a simple comparison between two version numbers, accounting for standard versioning logic such as the fact that "535.8" is a lower version than "535.24", even though a simple numerical comparison would indicate that it's greater. Also accounts for cases such as "1.1" vs. "1.1.0", which are considered equivalent.
Returns -1 if version a is lower than version b, 0 if they're equivalent, 1 if a is higher than b.
Versions may be numbers or strings containing numbers and dots. For example,
both 535 and "535.8.10" are acceptable. A version string containing
non-numeric characters, like "535.8.beta", may produce unexpected results.
-1 if a is lower than b, 0 if they're equivalent, 1 if a is higher than b.
airAdobe AIR version number or 0. Only populated if webkit is detected. Example: 1.0
androidDetects Googles Android OS version
cajaGoogle Caja version number or 0.
chromeChrome will be detected as webkit, but this property will also be populated with the Chrome version number
geckoGecko engine revision number. Will evaluate to 1 if Gecko is detected but the revision could not be found. Other browsers will be 0. Example: 1.8
Firefox 1.0.0.4: 1.7.8 <-- Reports 1.7 Firefox 1.5.0.9: 1.8.0.9 <-- 1.8 Firefox 2.0.0.3: 1.8.1.3 <-- 1.81 Firefox 3.0 <-- 1.9 Firefox 3.5 <-- 1.91
ieInternet Explorer version number or 0. Example: 6
ipadDetects Apple iPad's OS version
iphoneDetects Apple iPhone's OS version
ipodDetects Apples iPod's OS version
mobileThe mobile property will be set to a string containing any relevant user agent information when a modern mobile browser is detected. Currently limited to Safari on the iPhone/iPod Touch, Nokia N-series devices with the WebKit-based browser, and Opera Mini.
Default: null
nodejsThe Nodejs Version
Default: 0
operaOpera version number or 0. Example: 9.2
phantomjsPhantomJS version number or 0. Only populated if webkit is detected. Example: 1.0
safariSafari will be detected as webkit, but this property will also be populated with the Safari version number
silkDetects Kindle Silk
ubuntuDetects Ubuntu version
webkitAppleWebKit version. KHTML browsers that are not WebKit browsers will evaluate to 1, other browsers 0. Example: 418.9
Safari 1.3.2 (312.6): 312.8.1 <-- Reports 312.8 -- currently the
latest available for Mac OSX 10.3.
Safari 2.0.2: 416 <-- hasOwnProperty introduced
Safari 2.0.4: 418 <-- preventDefault fixed
Safari 2.0.4 (419.3): 418.9.1 <-- One version of Safari may run
different versions of webkit
Safari 2.0.4 (419.3): 419 <-- Tiger installations that have been
updated, but not updated
to the latest patch.
Webkit 212 nightly: 522+ <-- Safari 3.0 precursor (with native
SVG and many major issues fixed).
Safari 3.0.4 (523.12) 523.12 <-- First Tiger release - automatic
update from 2.x via the 10.4.11 OS patch.
Webkit nightly 1/2008:525+ <-- Supports DOMContentLoaded event.
yahoo.com user agent hack removed.
http://en.wikipedia.org/wiki/Safari_version_history
webosDetects Palms WebOS version