How to Sort elements of different type in single column in jquery data table

tarun25

I have a scenario to sort a column having multiple type of elements, drop-down list and string(HTML) type.
I want to sort that particular column containing drop-down list and HTML type of data.
This is what I Have tried using

"orderDataType": "dom-select" and "sType": 'html'

$.fn.dataTable.ext.order['dom-select'] = function (settings, col) { return this.api().column(col, { order: 'index' }).nodes().map(function (td, i) { return $('select', td).val(); }); }
But only the string is sorting.
The drop down list is not sorting.

Please give me suggestions