Add sorting arrow on the all nested data tables with Jquery

would like to add sorting arrow on the table headers. We have got 3 nested data table.

var getTableHeader = $(".dataTable th");
[url=""]Jsfiddle code[/url]
console.log("table header is clicked");
$(this).find('span').toggleClass('ascArr descArr');

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It does not add on the 2 and 3.level datatable header.  Can anyone help me on this issue please ?
Yakup KAsked:
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Julian HansenCommented:
According to the Docs for Nested tables you need to set the bsort setting to true

var settings = {
  "iDisplayLength": 20,
  "bLengthChange": false,
  "bFilter": false,
  "bSort": true,  // <<===== MUST BE TRUE
  "bInfo": false

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Like Julian said with
"bSort": true, 

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this add the feature for all.
And if you want to disable it on some column you can use bSortable (i usually remove it from tool column, when there are only checkbox or in your case the arrow to open the child section)

$(document).ready( function() {
  $('#example').dataTable( {
   // for all
   "bSort": true,
   // not on the first column You can change 0 to any other column number
    "aoColumnDefs": [
      { "bSortable": false, "aTargets": [ 0 ] }
    ] } );
} );

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for more info
table sortings
multi sorting

To sort some data type like date or digits you will need to use a sort plugins

Also you will need some code adjustment if your data have HTML code.
Yakup KAuthor Commented:
Thanks very much for your answer. That's fixed now.
Julian HansenCommented:
You are welcome.
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