accordion.js

;(function($, window) {
  
  var defaults = {
    duration: 1000,
    delay: 500,
    hideTree: 'hideTree',
    showTree: 'showTree'
  }

  function accordion(el,options) {
    this.$el = el;
    this.options = $.extend({}, defaults, options);
    this.init();
    return this;
  }

  accordion.prototype.init = function() {
    this.$el.addClassName('foobar');
  }

	accordion.prototype.hideTree = function() {
		$(this).find("li > ul").attr("data-name", this.options.hideTree);
	};

	accordion.prototype.showTree = function() {
		$("a").on("click", function(event) {
			$(this).trigger("openTree");
		})
	};

	accordion.prototype.bindEvents = function() {
		$(this).on("openTree", function(event) {
			event.preventDefault();
			$(event.target).next("ul").attr("data-name", this.options.showTree);
		});
	};

	$.fn.accordion = function(options) {
    this.each(function() {
      if(!$.data(this, 'accordion')) $.data(this, 'accordion', new Accordion(this, options));
    });
    return this;
	}
})(jQuery, window);

$(".module__accordion").accordion({
  duration: 5000,
  delay: 1000,
  hideTree: "hideTree",
  showTree: "showTree"
});