KnockoutJS jqeury UI Accordion depending on RXJS

KnockoutJS_jqAccordion

//KnockoutJS - Jquery UI binding depending on RXJS library
//
//Example of usage
//<div data-bind='template: { name: "tmpl", foreach: items, afterAdd: function(elem){ $(elem).trigger("valueChanged");} }, jqAccordion: {}'/>


ko.bindingHandlers.jqAccordion = {
   init: function(element, valueAccessor) {
        var options = valueAccessor();
        var jqElement = $(element);
        jqElement.accordion(options);


        jqElement.toObservable("valueChanged")
          .Select(function() {return Rx.Observable.Return().Delay(1);} )
          .Switch()
          .Subscribe(function(x) { 
            ko.bindingHandlers.jqAccordion.update(element,valueAccessor);
        })

    },
    update: function(element,valueAccessor) {
        var options = valueAccessor();
        var activeoptions = $(element).accordion("option");
        $(element).accordion('destroy').accordion(activeoptions);
    }
};