Hi,

Can you show the code you are using for the changing dataset variable?

After successfully received data from the server it's enough to update the body of your table, f.e:

        //Basic setup
        $('#dtBasicExample').DataTable();
        $('.dataTables_length').addClass('bs-select');
        //

       // saving your datatable to the variable
        let dataTable = $('#dtBasicExample');
        //saving datatable's body to the variable
        let dataTableBody = dataTable[0].childNodes[3];

        //After receiving data from the server 
        //you should process the data to the similar look 
        let updatedBody = `<tr>
          <td>Tiger Nixon</td>
          <td>System Architect</td>
          <td>Edinburgh</td>
          <td>61</td>
          <td>2011/04/25</td>
          <td>$320,800</td>
        </tr>
        <tr>
          <td>Garrett Winters</td>
          <td>Accountant</td>
          <td>Tokyo</td>
          <td>63</td>
          <td>2011/07/25</td>
          <td>$170,750</td>
        </tr>`;

         //sets the received and processed data as a body 
        const setNewBody = body => (dataTableBody.innerHTML = body);

        //
        fetch('...')
          .then(response => response.json())
          .then(() => setNewBody(updatedBody));

         //the code above should be replaced with:
         //then(data => processData(data))
         //then(res => setNewBody(res))

      });

Hope I could help.

Best regards.