Simple Toggle widget with jQuery or Backbone

bridge-DOM.js

var toggleFacet = {
    init: function (options, elem) {
        this.options = $.extend({}, this.options, options);
        this.$elem = $(elem);

        this.eventify();
    },

    options: {
        toggleClass: 'facet-collapsed'
    },

    eventify: function () {
        var that = this;
        this.$elem.on('click', function (e) {
            if(e.target !== this) {
                return;
            }
            e.preventDefault();
            $(this).toggleClass(that.options.toggleClass);
        });
    }
};

(function ($) {
    $.fn.extend({
        toggleFacet: function (options) {
            return this.each(function () {
                var myToggleFacet = Object.create(toggleFacet);

                myToggleFacet.init(options, this);

                $(this).data('toggleFacet', myToggleFacet);
            });
        }
    });
})(jQuery);

toggle-backbone.js

var ToggleFacet = Backbone.View.extend({
    el: '#caratteristiche',
    events: {
        'click': 'toggleFacet'
    },
    toggleFacet: function(event) {
        event.preventDefault();
        this.$el.toggleClass('facet-collapsed');
    }
});

toggle.jquery.js

    $('#caratteristiche, #caratteristiche1, #caratteristiche2').on('click', 'a', function(event){
        if(event.target !== this) {
            return;
        }
        event.preventDefault();
        $(this).parent().toggleClass('facet-collapsed');
    });