[QlikView extension][javascript] Sortable.js-library doesn't work

[Anonymous]

Hello,

I've a problem with javascript. I've tried to use the Sortable.js library. But I don't succeed yet. The UL-list with its list items is there but I can't get the sorting mechanism working

My extension folder contains: definition.xml, script.js and the Sortable.min.js

And that's my script.js code

var EXTENSION_NAME = "HelloWorld"
var remoteUrl = Qva.Remote + (Qva.Remote.indexOf("?") >= 0 ? "&" : "?") + "public=only&name=Extensions/" + EXTENSION_NAME;
var jsFiles = [remoteUrl + "/Sortable.min.js"];
Qv.LoadExtensionScripts(jsFiles, function() {
  Qva.AddExtension(EXTENSION_NAME, function() {    
  var e = this.Element;
  $(e).empty();
  var ul = document.createElement('ul');
  ul.setAttribute('id','listitems')
  e.appendChild(ul);
  var texts = ['ratatat','matatat','hatatat'];

  for (var i = 0; i < 3; i++){
  var li = document.createElement('li');
  ul.appendChild(li);
  li.innerHTML="";
  li.innerHTML += texts;
  }

  var foo = document.getElementById('listitems');
  Sortable.create(foo, { group: "omega" });
  });
});

Kind regards,

Markus