cookie.js

这是YUI的源码及相关示例。里面有很多很炫的Javascript效果。

        var lang = YAHOO.lang;    
        var hash /*:Variant*/ = this.getSubs(name);  

        if (hash !== null) {
            
            if (!lang.isString(subName) || subName === ""){
                throw new TypeError("Cookie.getSub(): Subcookie name must be a non-empty string.");
            }
            
            if (lang.isUndefined(hash[subName])){
                return null;
            }            
        
            if (!lang.isFunction(converter)){
                return hash[subName];
            } else {
                return converter(hash[subName]);
            }
        } else {
            return null;
        }
    
    },
    
    /**
     * Returns an object containing name-value pairs stored in the cookie with the given name.
     * @param {String} name The name of the cookie to retrieve.
     * @return {Object} An object of name-value pairs if the cookie with the given name
     *      exists, null if it does not.
     * @method getHash
     * @static
     */
    getSubs : function (name /*:String*/) /*:Object*/ {
        
        //check cookie name
        if (!YAHOO.lang.isString(name) || name === ""){
            throw new TypeError("Cookie.getSubs(): Cookie name must be a non-empty string.");
        }
        
        var cookies = this._parseCookieString(document.cookie, false);
        if (YAHOO.lang.isString(cookies[name])){
            return this._parseCookieHash(cookies[name]);
        }
        return null;
    },
    
    /**
     * Removes a cookie from the machine by setting its expiration date to
     * sometime in the past.
     * @param {String} name The name of the cookie to remove.
     * @param {Object} options (Optional) An object containing one or more
     *      cookie options: path (a string), domain (a string), 
     *      and secure (true/false). The expires option will be overwritten
     *      by the method.
     * @return {String} The created cookie string.
     * @method remove
     * @static
     */
    remove : function (name /*:String*/, options /*:Object*/) /*:String*/ {
        
        //check cookie name
        if (!YAHOO.lang.isString(name) || name === ""){
            throw new TypeError("Cookie.remove(): Cookie name must be a non-empty string.");
        }
        
        //set options
        options = options || {};
        options.expires = new Date(0);
        
        //set cookie
        return this.set(name, "", options);
    },

    /**
     * Removes a sub cookie with a given name.
     * @param {String} name The name of the cookie in which the subcookie exists.
     * @param {String} subName The name of the subcookie to remove.
     * @param {Object} options (Optional) An object containing one or more
     *      cookie options: path (a string), domain (a string), expires (a Date object),
     *      and secure (true/false). This must be the same settings as the original
     *      subcookie.
     * @return {String} The created cookie string.
     * @method removeSub
     * @static
     */
    removeSub : function(name /*:String*/, subName /*:String*/, options /*:Object*/) /*:String*/ {
    
        //check cookie name
        if (!YAHOO.lang.isString(name) || name === ""){
            throw new TypeError("Cookie.removeSub(): Cookie name must be a non-empty string.");
        }
        
        //check subcookie name
        if (!YAHOO.lang.isString(subName) || subName === ""){
            throw new TypeError("Cookie.removeSub(): Subcookie name must be a non-empty string.");
        }
        
        //get all subcookies for this cookie
        var subs = this.getSubs(name);
        
        //delete the indicated subcookie
        if (YAHOO.lang.isObject(subs) && YAHOO.lang.hasOwnProperty(subs, subName)){
            delete subs[subName];
            
            //reset the cookie
            return this.setSubs(name, subs, options);
        } else {
            return "";
        }
        
    },

    /**
     * Sets a cookie with a given name and value.
     * @param {String} name The name of the cookie to set.
     * @param {Variant} value The value to set for the cookie.
     * @param {Object} options (Optional) An object containing one or more
     *      cookie options: path (a string), domain (a string), expires (a Date object),
     *      and secure (true/false).
     * @return {String} The created cookie string.
     * @method set
     * @static
     */
    set : function (name /*:String*/, value /*:Variant*/, options /*:Object*/) /*:String*/ {
    
        var lang = YAHOO.lang;
    
        if (!lang.isString(name)){
            throw new TypeError("Cookie.set(): Cookie name must be a string.");
        }
        
        if (lang.isUndefined(value)){
            throw new TypeError("Cookie.set(): Value cannot be undefined.");
        }
        
    
        var text /*:String*/ = this._createCookieString(name, value, true, options);
        document.cookie = text;
        return text;
    },
        
    /**
     * Sets a sub cookie with a given name to a particular value.
     * @param {String} name The name of the cookie to set.
     * @param {String} subName The name of the subcookie to set.
     * @param {Variant} value The value to set.
     * @param {Object} options (Optional) An object containing one or more
     *      cookie options: path (a string), domain (a string), expires (a Date object),
     *      and secure (true/false).
     * @return {String} The created cookie string.
     * @method setSub
     * @static
     */
    setSub : function (name /*:String*/, subName /*:String*/, value /*:Variant*/, options /*:Object*/) /*:String*/ {
        
        var lang = YAHOO.lang;

        if (!lang.isString(name) || name === ""){
            throw new TypeError("Cookie.setSub(): Cookie name must be a non-empty string.");
        }

        if (!lang.isString(subName) || subName === ""){
            throw new TypeError("Cookie.setSub(): Subcookie name must be a non-empty string.");
        }
        
        if (lang.isUndefined(value)){
            throw new TypeError("Cookie.setSub(): Subcookie value cannot be undefined.");
        }

        var hash /*:Object*/ = this.getSubs(name);
        
        if (!lang.isObject(hash)){
            hash = new Object();
        }
        
        hash[subName] = value;        
        
        return this.setSubs(name, hash, options);
        
    },
    
    /**
     * Sets a cookie with a given name to contain a hash of name-value pairs.
     * @param {String} name The name of the cookie to set.
     * @param {Object} value An object containing name-value pairs.
     * @param {Object} options (Optional) An object containing one or more
     *      cookie options: path (a string), domain (a string), expires (a Date object),
     *      and secure (true/false).
     * @return {String} The created cookie string.
     * @method setSubs
     * @static
     */
    setSubs : function (name /*:String*/, value /*:Object*/, options /*:Object*/) /*:String*/ {
        
        var lang = YAHOO.lang;
        
        if (!lang.isString(name)){
            throw new TypeError("Cookie.setSubs(): Cookie name must be a string.");
        }
        
        if (!lang.isObject(value)){
            throw new TypeError("Cookie.setSubs(): Cookie value must be an object.");
        }
    
        var text /*:String*/ = this._createCookieString(name, this._createCookieHashString(value), false, options);
        document.cookie = text;
        return text;        
    }    

};
YAHOO.register("cookie", YAHOO.util.Cookie, {version: "2.6.0", build: "1321"});