simple jquery collapsible container plugin

jquery.collapseContainer.js

/**
	jQuery.collapseContainer v0.1
	Dave Taylor http://the-taylors.org

	@license The MIT License (MIT)
*/
/*global define,require */
(function($){
	'use strict';

	var uniqueId = 0,

		OPEN_CLASS = 'collapseContainer-open'
	;

	var CollapseContainer = function(el, options){
		if (el || options){ this.init(el, options); }
	};
	CollapseContainer.prototype = {
		defaults: {
			scrollTo: true
		},
		init: function(el, options){
			var self = this;

			this.$el = $(el);
			this.containerId = el.id = el.id || 'collapseContainer' + (uniqueId++);
			this.settings = $.extend({}, this.defaults, options);

			$.collapseContainer.containers.push(this); // add to global list
			this.$el.hide(); // hide this container initially

			this.$el.data('collapseContainer', this);
			return this;
		},
		visible: function(){
			return this.$el.hasClass(OPEN_CLASS);
		},
		expand: function(){
			this.$el
				.addClass(OPEN_CLASS)
				.show();
		},
		collapse: function(){
			this.$el
				.removeClass(OPEN_CLASS)
				.hide();
		},
		toggle: function(){
			if (this.visible()){
				this.collapse();
			} else {
				this.expand();
			}
		},
		scrollTo: function(){
			$('html,body').animate({ scrollTop: this.$el.offset().top }, 1000, 'swing');
		}
	};

	$.collapseContainer = {
		containers: []
	};
	$.fn.collapseContainer = function(options) {
		return this.each(function(){
			var collapseContainer = new CollapseContainer(this, options);
		});
	};

	// listener to toggle container visibility
	$(document).on('click', 'a[href^="#"]', function(e){
		var linkId = $(this).attr('href');

		$($.collapseContainer.containers).each(function(){
			if ('#'+this.containerId === linkId){
				this.toggle();
				if (this.settings.scrollTo){
					this.scrollTo();
				}
				e.preventDefault();
			}
		});
	});

}(this.jQuery));