javascript - Can't get accordion to work properly in cshtml -

i'm following example: http://jsfiddle.net/rniemeyer/mfegm/

javascript

// using jquery-ui-1.11.4.js // ,   jquery-1.10.2.js // creates few tags loop through var tag = {     userid: "muzzya",     tagtext: "this text should collapsed in accordion" }; self.tags.push(new tag(tag, null)); self.tags.push(new tag(tag, null)); self.tags.push(new tag(tag, null));  var tag = function(tag, comments) {     this.tag = ko.observable(tag);     this.comments = ko.observablearray(comments); } 

cshtml

<div class="panel-body" data-bind="foreach:tags,accordion: {}">     <h4>             <a href="#" data-bind="text: tag().userid"></a>     </h4>     <div>         // content here     </div> </div> 

the result list, no accordion

i'm not sure i'm doing wrong.

edit: calling .accordion

function init() { ko.applybindings(new viewmodel());  ko.bindinghandlers.accordion = {     init: function (element, valueaccessor) {         var options = valueaccessor() || {};         settimeout(function () {             $(element).accordion(options);         }, 0);          //handle disposal (if ko removes template binding)         ko.utils.domnodedisposal.adddisposecallback(element, function () {             $(element).accordion("destroy");         });     },     update: function (element, valueaccessor) {         var options = valueaccessor() || {};         $(element).accordion("destroy").accordion(options);     } } } 

below how view model set up. can't change it, because there's entire system relying on it. why gets binded way see

var viewmodel = function () { var self = this; self.tags = ko.observablearray(); }  document.addeventlistener("domcontentloaded", init, false);  function init() {   ko.applybindings(new viewmodel());  } 

applybindings can apply bindings have been defined. defining them afterward not retroactively apply them. moved additional binding handler defined before bindings applied, , removed settimeout, allowing destroys called before accordion set up.

var tag = function(tag, comments) {    this.tag = ko.observable(tag);    this.comments = ko.observablearray(comments);  }    var tag = {    userid: "muzzya",    tagtext: "this text should collapsed in accordion"  };    var viewmodel = function() {    var self = this;    self.tags = ko.observablearray();    self.tags.push(new tag(tag, null));    self.tags.push(new tag(tag, null));    self.tags.push(new tag(tag, null));  }    document.addeventlistener("domcontentloaded", init, false);      function init() {    ko.bindinghandlers.accordion = {      init: function(element, valueaccessor) {        var options = valueaccessor() || {};        $(element).accordion(options);          //handle disposal (if ko removes template binding)        ko.utils.domnodedisposal.adddisposecallback(element, function() {          $(element).accordion("destroy");        });      },      update: function(element, valueaccessor) {        var options = valueaccessor() || {};        $(element).accordion("destroy").accordion(options);      }    }    ko.applybindings(new viewmodel());  }

<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <script src="https://code.jquery.com/ui/1.11.3/jquery-ui.min.js"></script>  <div class="panel-body" data-bind="foreach:tags,accordion: {}">    <h4>              <a href="#" data-bind="text: tag().userid"></a>      </h4>    <div>      // content here    </div>  </div>