jQuery.createPlugin

gistfile1.js

// Use: passing in an object representing a jQuery plugin. The object is expected to have
// a name attribute (your plugin name in string form, e.g. name: "accordion") and an init
// method. The createPlugin method will take each element in the collection when the
// plugin method is called and initialize the plugin individually, writing a data object
// to the element with the same name as the plugin and storing the plugin object for
// later reference.
(function($) {
  $.createPlugin = function(plugin) {
    $.fn[plugin.name] = function(opts) {
      var $els = this,
          method = $.isPlainObject(opts) || !opts ? "" : opts;
      if (method && plugin[method]) {
        plugin[method].apply($els, Array.prototype.slice.call(arguments, 1));
      }
      else if (!method) {
        $els.each(function(i) {
          var plugin_instance = $.extend(true, {
            $el: $els.eq(i)
          }, plugin, opts);
          $els.eq(i).data(plugin.name, plugin_instance);
          plugin_instance.init();
        });
      }
      else {
        $.error('Method ' +  method + ' does not exist on jQuery.' + plugin.name);
      }
      return $els;
    };
  };
})(jQuery);

(function($) {
  var accordion = {
    name: "accordion",
    init: function() {
      if (this.$el.data(this.name)) { return; }
      // Run event listeners, setup code, etc. here
    }
  };

  $.createPlugin(accordion);
})(jQuery);