Add new tab dynamically with bootstrap/twig -

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i want add remove tab dynamically bootstrap in twig found source code dynamically add/remove new tab dosen't work when click on "add tab" nothing happend can me please twig :

{% block javascripts %} {{ parent() }}  <script type="text/javascript" >      $(doument).ready();      var pagenum = 1;     $('#btnadd').click(function () {         var nexttab = $('#tabs li').size()+1;          $('<li><a href="#tab'+nexttab+'" data-toggle="tab">tab '+nexttab+'</a></li>').appendto('#tabs');          $('<div class="tab-pane" id="tab'+nexttab+'">tab' +nexttab+' content</div>').appendto('.tab-content');          $('#tabs a:last').tab('show');     });         $('#btnadd').click(function () {         var nexttab = $('#tabs li').size()+1;         $('<li><a href="#tab'+nexttab+'" data-toggle="tab">tab '+nexttab+'</a></li>').appendto('#tabs');          $('<div class="tab-pane" id="tab'+nexttab+'">tab' +nexttab+' content</div>').appendto('.tab-content');         $('#tabs a:last').tab('show');     });  </script> {% endjavascripts %} {% endblock %}  {% block sonata_admin_content %}  <a href="javascript:;" id="btnadd"><i class="icon-plus-sign-alt"></i> add tab</a>  <ul class="nav nav-tabs hidden-print" role="tablist" id="tabpanel">    <li classe="active"><a id="tab_form" href="#formulaire" role="tab" data-toggle="tab">formulaire</a></li>    <li><a id="tab_form" href="#formulaire" role="tab" data-toggle="tab">tableau de bord</a></li> </ul>  <div class="tab-content">      <div class="tab-pane" id="formulaire">         <div class="stats-content">             <div class="connectedsortable ui-sortable">                 {% include 'techappstatsbundle:stats:form.html.twig' %}             </div>         </div>     </div>     </div> {% endblock %}

in add button click use 

var nexttab = $("#tabpanel li").length+1; //add tab button ul $("#tabpanel").append("<li><a href='#tab"+nexttab+"' data-toggle='tab'>tab"+nexttab+"</a></li>");  //add tab content $(".tab-content").append("<div id='tab"+nexttab+"' class='tab-pane'>tab"+ nexttab+"content</div>");

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