yahoo.js

这是YUI的源码及相关示例。里面有很多很炫的Javascript效果。

            m=ua.match(/NokiaN[^\/]*/);
            if (m) {
                o.mobile = m[0]; // Nokia N-series, ex: NokiaN95
            }
        }

        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=parseFloat(m[1]);
            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=parseFloat(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=parseFloat(m[1]);
                    }
                }
            }
        }
    }
    
    return o;
}();

/*
 * 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");
    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=i+1) {
                if (ls[i]==l) {
                    unique=false;
                    break;
                }
            }
            if (unique) {
                ls.push(l);
            }
        }
    }
})();
/**
 * Provides the language utilites and extensions used by the library
 * @class YAHOO.lang
 */
YAHOO.lang = YAHOO.lang || {};

(function() {

var L = YAHOO.lang,

    // ADD = ["toString", "valueOf", "hasOwnProperty"],
    ADD = ["toString", "valueOf"],

    OB = {

    /**
     * Determines whether or not the provided object is an array.
     * Testing typeof/instanceof/constructor of arrays across frame 
     * boundaries isn't possible in Safari unless you have a reference
     * to the other frame to test against its Array prototype.  To
     * handle this case, we test well-known array properties instead.
     * properties.
     * @method isArray
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isArray: function(o) { 
        if (o) {
           return L.isNumber(o.length) && L.isFunction(o.splice);
        }
        return false;
    },

    /**
     * Determines whether or not the provided object is a boolean
     * @method isBoolean
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isBoolean: function(o) {
        return typeof o === 'boolean';
    },
    
    /**
     * Determines whether or not the provided object is a function
     * @method isFunction
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isFunction: function(o) {
        return typeof o === 'function';
    },
        
    /**
     * Determines whether or not the provided object is null
     * @method isNull
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isNull: function(o) {
        return o === null;
    },
        
    /**
     * Determines whether or not the provided object is a legal number
     * @method isNumber
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isNumber: function(o) {
        return typeof o === 'number' && isFinite(o);
    },
      
    /**
     * Determines whether or not the provided object is of type object
     * or function
     * @method isObject
     * @param {any} o The object being testing
     * @return {boolean} the result
     */  
    isObject: function(o) {
return (o && (typeof o === 'object' || L.isFunction(o))) || false;
    },
        
    /**
     * Determines whether or not the provided object is a string
     * @method isString
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isString: function(o) {
        return typeof o === 'string';
    },
        
    /**
     * Determines whether or not the provided object is undefined
     * @method isUndefined
     * @param {any} o The object being testing
     * @return {boolean} the result
     */
    isUndefined: function(o) {
        return typeof o === 'undefined';
    },
    
 
    /**
     * IE will not enumerate native functions in a derived object even if the
     * function was overridden.  This is a workaround for specific functions 
     * we care about on the Object prototype. 
     * @property _IEEnumFix
     * @param {Function} r  the object to receive the augmentation
     * @param {Function} s  the object that supplies the properties to augment
     * @static
     * @private
     */
    _IEEnumFix: (YAHOO.env.ua.ie) ? function(r, s) {
            for (var i=0;i<ADD.length;i=i+1) {
                var fname=ADD[i],f=s[fname];
                if (L.isFunction(f) && f!=Object.prototype[fname]) {
                    r[fname]=f;
                }
            }
    } : function(){},
       
    /**
     * Utility to set up the prototype, constructor and superclass properties to
     * support an inheritance strategy that can chain constructors and methods.
     * Static members will not be inherited.
     *
     * @method extend
     * @static
     * @param {Function} subc   the object to modify
     * @param {Function} superc the object to inherit
     * @param {Object} overrides  additional properties/methods to add to the
     *                              subclass prototype.  These will override the
     *                              matching items obtained from the superclass 
     *                              if present.
     */
    extend: function(subc, superc, overrides) {
        if (!superc||!subc) {
            throw new Error("extend failed, please check that " +
                            "all dependencies are included.");
        }
        var F = function() {};
        F.prototype=superc.prototype;
        subc.prototype=new F();
        subc.prototype.constructor=subc;
        subc.superclass=superc.prototype;
        if (superc.prototype.constructor == Object.prototype.constructor) {
            superc.prototype.constructor=superc;
        }
    
        if (overrides) {
            for (var i in overrides) {
                if (L.hasOwnProperty(overrides, i)) {
                    subc.prototype[i]=overrides[i];
                }
            }

            L._IEEnumFix(subc.prototype, overrides);
        }
    },
   
    /**
     * Applies all properties in the supplier to the receiver if the
     * receiver does not have these properties yet.  Optionally, one or 
     * more methods/properties can be specified (as additional 
     * parameters).  This option will overwrite the property if receiver 
     * has it already.  If true is passed as the third parameter, all 
     * properties will be applied and _will_ overwrite properties in 
     * the receiver.
     *
     * @method augmentObject
     * @static
     * @since 2.3.0
     * @param {Function} r  the object to receive the augmentation
     * @param {Function} s  the object that supplies the properties to augment
     * @param {String*|boolean}  arguments zero or more properties methods 
     *        to augment the receiver with.  If none specified, everything
     *        in the supplier will be used unless it would
     *        overwrite an existing property in the receiver. If true
     *        is specified as the third parameter, all properties will
     *        be applied and will overwrite an existing property in
     *        the receiver
     */
    augmentObject: function(r, s) {
        if (!s||!r) {
            throw new Error("Absorb failed, verify dependencies.");
        }
        var a=arguments, i, p, override=a[2];
        if (override && override!==true) { // only absorb the specified properties
            for (i=2; i<a.length; i=i+1) {
                r[a[i]] = s[a[i]];
            }
        } else { // take everything, overwriting only if the third parameter is true
            for (p in s) { 
                if (override || !(p in r)) {
                    r[p] = s[p];
                }
            }
            
            L._IEEnumFix(r, s);
        }
    },
 
    /**
     * Same as YAHOO.lang.augmentObject, except it only applies prototype properties
     * @see YAHOO.lang.augmentObject
     * @method augmentProto
     * @static
     * @param {Function} r  the object to receive the augmentation
     * @param {Function} s  the object that supplies the properties to augment
     * @param {String*|boolean}  arguments zero or more properties methods 
     *        to augment the receiver with.  If none specified, everything 
     *        in the supplier will be used unless it would overwrite an existing 
     *        property in the receiver.  if true is specified as the third 
     *        parameter, all properties will be applied and will overwrite an 
     *        existing property in the receiver
     */
    augmentProto: function(r, s) {
        if (!s||!r) {
            throw new Error("Augment failed, verify dependencies.");
        }
        //var a=[].concat(arguments);
        var a=[r.prototype,s.prototype];
        for (var i=2;i<arguments.length;i=i+1) {
            a.push(arguments[i]);
        }
        L.augmentObject.apply(this, a);
    },

      
    /**
     * Returns a simple string representation of the object or array.
     * Other types of objects will be returned unprocessed.  Arrays
     * are expected to be indexed.  Use object notation for
     * associative arrays.
     * @method dump
     * @since 2.3.0
     * @param o {Object} The object to dump
     * @param d {int} How deep to recurse child objects, default 3
     * @return {String} the dump result
     */
    dump: function(o, d) {
        var i,len,s=[],OBJ="{...}",FUN="f(){...}",
            COMMA=', ', ARROW=' => ';

        // Cast non-objects to string
        // Skip dates because the std toString is what we want
        // Skip HTMLElement-like objects because trying to dump 
        // an element will cause an unhandled exception in FF 2.x
        if (!L.isObject(o)) {
            return o + "";
        } else if (o instanceof Date || ("nodeType" in o && "tagName" in o)) {
            return o;
        } else if  (L.isFunction(o)) {
            return FUN;
        }