YUI recommends YUI3.
YUI 2 has been deprecated since 2011. This site acts as an archive for files and documentation.
This documentation is no longer maintained.
/**
* YAHOO.env is used to keep track of what is known about the YUI library and
* the browsing environment
* @class YAHOO.env
* @static
*/
YAHOO.env = YAHOO.env || {
/**
* Keeps the version info for all YUI modules that have reported themselves
* @property modules
* @type Object[]
*/
modules: [],
/**
* List of functions that should be executed every time a YUI module
* reports itself.
* @property listeners
* @type Function[]
*/
listeners: []
};
/**
* Returns the version data for the specified module:
* <dl>
* <dt>name:</dt> <dd>The name of the module</dd>
* <dt>version:</dt> <dd>The version in use</dd>
* <dt>build:</dt> <dd>The build number in use</dd>
* <dt>versions:</dt> <dd>All versions that were registered</dd>
* <dt>builds:</dt> <dd>All builds that were registered.</dd>
* <dt>mainClass:</dt> <dd>An object that was was stamped with the
* current version and build. If
* mainClass.VERSION != version or mainClass.BUILD != build,
* multiple versions of pieces of the library have been
* loaded, potentially causing issues.</dd>
* </dl>
*
* @method getVersion
* @static
* @param {String} name the name of the module (event, slider, etc)
* @return {Object} The version info
*/
YAHOO.env.getVersion = function(name) {
return YAHOO.env.modules[name] || null;
};
/**
* 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. YAHOO.env.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 (e.g., Gecko 1.8.0.9
* reports 1.8).
* @class YAHOO.env.ua
* @static
*/
/**
* parses a user agent string (or looks for one in navigator to parse if
* not supplied).
* @method parseUA
* @since 2.9.0
* @static
*/
YAHOO.env.parseUA = function(agent) {
var numberify = function(s) {
var c = 0;
return parseFloat(s.replace(/\./g, function() {
return (c++ == 1) ? '' : '.';
}));
},
nav = navigator,
o = {
/**
* Internet Explorer version number or 0. Example: 6
* @property ie
* @type float
* @static
*/
ie: 0,
/**
* Opera version number or 0. Example: 9.2
* @property opera
* @type float
* @static
*/
opera: 0,
/**
* 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
* <pre>
* 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
* </pre>
* @property gecko
* @type float
* @static
*/
gecko: 0,
/**
* AppleWebKit version. KHTML browsers that are not WebKit browsers
* will evaluate to 1, other browsers 0. Example: 418.9
* <pre>
* 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.
* </pre>
* http://en.wikipedia.org/wiki/Safari_version_history
* @property webkit
* @type float
* @static
*/
webkit: 0,
/**
* Chrome will be detected as webkit, but this property will also
* be populated with the Chrome version number
* @property chrome
* @type float
* @static
*/
chrome: 0,
/**
* 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.
* @property mobile
* @type string
* @static
*/
mobile: null,
/**
* Adobe AIR version number or 0. Only populated if webkit is detected.
* Example: 1.0
* @property air
* @type float
*/
air: 0,
/**
* Detects Apple iPad's OS version
* @property ipad
* @type float
* @static
*/
ipad: 0,
/**
* Detects Apple iPhone's OS version
* @property iphone
* @type float
* @static
*/
iphone: 0,
/**
* Detects Apples iPod's OS version
* @property ipod
* @type float
* @static
*/
ipod: 0,
/**
* General truthy check for iPad, iPhone or iPod
* @property ios
* @type float
* @static
*/
ios: null,
/**
* Detects Googles Android OS version
* @property android
* @type float
* @static
*/
android: 0,
/**
* Detects Palms WebOS version
* @property webos
* @type float
* @static
*/
webos: 0,
/**
* Google Caja version number or 0.
* @property caja
* @type float
*/
caja: nav && nav.cajaVersion,
/**
* Set to true if the page appears to be in SSL
* @property secure
* @type boolean
* @static
*/
secure: false,
/**
* The operating system. Currently only detecting windows or macintosh
* @property os
* @type string
* @static
*/
os: null
},
ua = agent || (navigator && navigator.userAgent),
loc = window && window.location,
href = loc && loc.href,
m;
o.secure = href && (href.toLowerCase().indexOf("https") === 0);
if (ua) {
if ((/windows|win32/i).test(ua)) {
o.os = 'windows';
} else if ((/macintosh/i).test(ua)) {
o.os = 'macintosh';
} else if ((/rhino/i).test(ua)) {
o.os = 'rhino';
}
// Modern KHTML browsers should qualify as Safari X-Grade
if ((/KHTML/).test(ua)) {
o.webkit = 1;
}
// Modern WebKit browsers are at least X-Grade
m = ua.match(/AppleWebKit\/([^\s]*)/);
if (m && m[1]) {
o.webkit = numberify(m[1]);
// Mobile browser check
if (/ Mobile\//.test(ua)) {
o.mobile = 'Apple'; // iPhone or iPod Touch
m = ua.match(/OS ([^\s]*)/);
if (m && m[1]) {
m = numberify(m[1].replace('_', '.'));
}
o.ios = m;
o.ipad = o.ipod = o.iphone = 0;
m = ua.match(/iPad|iPod|iPhone/);
if (m && m[0]) {
o[m[0].toLowerCase()] = o.ios;
}
} else {
m = ua.match(/NokiaN[^\/]*|Android \d\.\d|webOS\/\d\.\d/);
if (m) {
// Nokia N-series, Android, webOS, ex: NokiaN95
o.mobile = m[0];
}
if (/webOS/.test(ua)) {
o.mobile = 'WebOS';
m = ua.match(/webOS\/([^\s]*);/);
if (m && m[1]) {
o.webos = numberify(m[1]);
}
}
if (/ Android/.test(ua)) {
o.mobile = 'Android';
m = ua.match(/Android ([^\s]*);/);
if (m && m[1]) {
o.android = numberify(m[1]);
}
}
}
m = ua.match(/Chrome\/([^\s]*)/);
if (m && m[1]) {
o.chrome = numberify(m[1]); // Chrome
} else {
m = ua.match(/AdobeAIR\/([^\s]*)/);
if (m) {
o.air = m[0]; // Adobe AIR 1.0 or better
}
}
}
if (!o.webkit) { // not webkit
// @todo check Opera/8.01 (J2ME/MIDP; Opera Mini/2.0.4509/1316; fi; U; ssr)
m = ua.match(/Opera[\s\/]([^\s]*)/);
if (m && m[1]) {
o.opera = numberify(m[1]);
m = ua.match(/Version\/([^\s]*)/);
if (m && m[1]) {
o.opera = numberify(m[1]); // opera 10+
}
m = ua.match(/Opera Mini[^;]*/);
if (m) {
o.mobile = m[0]; // ex: Opera Mini/2.0.4509/1316
}
} else { // not opera or webkit
m = ua.match(/MSIE\s([^;]*)/);
if (m && m[1]) {
o.ie = numberify(m[1]);
} else { // not opera, webkit, or ie
m = ua.match(/Gecko\/([^\s]*)/);
if (m) {
o.gecko = 1; // Gecko detected, look for revision
m = ua.match(/rv:([^\s\)]*)/);
if (m && m[1]) {
o.gecko = numberify(m[1]);
}
}
}
}
}
}
return o;
};
YAHOO.env.ua = YAHOO.env.parseUA();
/*
* Initializes the global by creating the default namespaces and applying
* any new configuration information that is detected. This is the setup
* for env.
* @method init
* @static
* @private
*/
(function() {
YAHOO.namespace("util", "widget", "example");
/*global YAHOO_config*/
if ("undefined" !== typeof YAHOO_config) {
var l=YAHOO_config.listener, ls=YAHOO.env.listeners,unique=true, i;
if (l) {
// if YAHOO is loaded multiple times we need to check to see if
// this is a new config object. If it is, add the new component
// load listener to the stack
for (i=0; i<ls.length; i++) {
if (ls[i] == l) {
unique = false;
break;
}
}
if (unique) {
ls.push(l);
}
}
}
})();