单子模式

Posted 2021-02-25

/**
 * Example singleton
 */
 
 
Singleton = (function() {
 
	return {
 
 
		/**
		 * Create a new dom node
		 *
		 * @param {String} className add a class to the node
		 * @param {String} nodeName the node to create
		 *
		 * @example
		 * <code>	
		 * 	Singleton.create('foo', 'span');
		 * </code>
		 *
		 * @return {html element} the new node
		 */
 
		create : function( className, nodeName ) {
			nodeName = nodeName || 'div';
			var elem = doc.createElement( nodeName );
			elem.className = className;
			return elem;
		},
 
		/**
		 * Appends a string to 'Hello '
		 *
		 * @param {String} str the string to append
		 *
		 * @example
		 * <code>
		 * 	Singleton.helloworld('world');
		 * </code>	
		 *
		 * @return {String} the modified string
		 */
 
		helloworld : function( str ) {
			output = 'Hello ' + str;
			return output;
		}
 
	}
 
})();