dataTable Responsive

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.13/css/dataTables.bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.datatables.net/responsive/2.1.1/css/responsive.bootstrap.min.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://cdn.datatables.net/1.10.13/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/1.10.13/js/dataTables.bootstrap.min.js"></script>
<script src="https://cdn.datatables.net/responsive/2.1.1/js/dataTables.responsive.min.js"></script>
<script src="https://cdn.datatables.net/responsive/2.1.1/js/responsive.bootstrap.min.js"></script>
    <p>Click on Add option  button to add options in dropdown</p>
<button type="button" id="btn1">
Add option 

</button>
<br/>

<table class="table table-striped table-hover" id="myTable">
<thead>
<tr>
  <th>Indent No.</th>
  <th>Warehouse</th>
  <th>Item</th>
  <th>Make/Catno</th>
  <th>UOM</th>
  <th>Qty</th>
  <th>Qty P</th>
  <th>Sh Cl</th>
  <th>Date</th>
  <th>SortDate</th>
  <th>Rqt Dt</th>
  <th>Dropdown</th>
  <th>Cost Centre</th>
  <th>Remarks</th>
  <th>By</th>
  <th>Entry</th>
  <th></th>


  </tr>
</thead>

<tbody>

  <tr>

    <td>INDMSF/16-17/00003</td>

    <td>Furnace</td>
    <td>Bearing 22317 EW33J</td>

    <td></td>

    <td>no</td>
    <td>2.0</td>

    <td>2.0</td>
    <td></td>
    <td>31/08/16</td>
    <td>08/31/16</td>

    <td>31/08/16</td>
         <td><select id="ddlTest" class="ddlTest" style="width: 300px"></select></td>

    <td></td>

    <td></td>
    <td>Ashfaque</td>
    <td>Ayush Jhunjhunwala</td>
    <td><input class="btn btn-default btn-xs" name="155" type="submit" value="&gt;" /></td>
  </tr>
 </tbody>
</table>

JavaScript

$('#myTable').DataTable( {
    responsive: true
} );


	$(document).ready(function() {
    
 $("#btn1").click(function(){
        var ddl = $('.ddlTest');
ddl.append($("<option></option>").val('0').html('Selectvalue'));
    }); 
} );