Version 3.18.1
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UA Class

Defined in: yui/js/yui-ua.js:9
Module: yui-base
Parent Module: yui

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.

Item Index

Methods

Properties

Methods

compareVersions

(
  • a
  • 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.

Parameters:

Returns:

-1 if a is lower than b, 0 if they're equivalent, 1 if a is higher than b.

parseUA

(
  • [subUA=navigator.userAgent]
)
Object static

Defined in yui/js/yui-ua.js:25

Static method on YUI.Env for parsing a UA string. Called at instantiation to populate Y.UA.

Parameters:

  • [subUA=navigator.userAgent] String optional

    UA string to parse

Returns:

Object:

The Y.UA object

Properties

accel

Boolean static

Detects Kindle Silk Acceleration

air

Float

Adobe AIR version number or 0. Only populated if webkit is detected. Example: 1.0

android

Float static

Detects Googles Android OS version

caja

Float

Google Caja version number or 0.

chrome

Float static

Chrome will be detected as webkit, but this property will also be populated with the Chrome version number

gecko

Float static

Defined in yui/js/yui-ua.js:65

Gecko 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
            

ie

Float static

Defined in yui/js/yui-ua.js:49

Internet Explorer version number or 0. Example: 6

ios

Boolean static

General truthy check for iPad, iPhone or iPod

Default: null

ipad

Float static

Detects Apple iPad's OS version

iphone

Float static

Detects Apple iPhone's OS version

ipod

Float static

Detects Apples iPod's OS version

mobile

String static

The 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

nodejs

Float static

The Nodejs Version

Default: 0

opera

Float static

Defined in yui/js/yui-ua.js:57

Opera version number or 0. Example: 9.2

os

String static

The operating system.

Possible values are windows, macintosh, android, symbos, linux, rhino and ios.

Default: null

phantomjs

Float

PhantomJS version number or 0. Only populated if webkit is detected. Example: 1.0

safari

Float static

Safari will be detected as webkit, but this property will also be populated with the Safari version number

secure

Boolean static

Set to true if the page appears to be in SSL

silk

Float static

Detects Kindle Silk

touchEnabled

Boolean static

Are touch/msPointer events available on this device

ubuntu

Float static

Detects Ubuntu version

userAgent

String static

The User Agent string that was parsed

webkit

Float static

Defined in yui/js/yui-ua.js:82

AppleWebKit 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

webos

Float static

Detects Palms WebOS version

winjs

Boolean static

Window8/IE10 Application host environment