jQuery append and remove dynamic table row, nothing happened

I can add many rows for a table. when i click "Add", nothing happened. i want to add many rows and remove rows. this my source code.

<script src="https://code.jquery.com/jquery-3.1.1.slim.js" integrity="sha256-5i/mQ300M779N2OVDrl16lbohwXNUdzL/R2aVUXyXWA="crossorigin="anonymous"></script>
    <input class="form-control" type="input" id="id_subtema" name="id_subtema" placeholder="Nama SUb Tema" required="" readonly="">
    <input class="form-control" type="number" id="jumlah_soal" name="jumlah_soal" placeholder="Jumlah Soal" required="">
        <input type="button" class="btn btn-primary form-control add-row" value="Add">

<table class="table table-bordered table-striped">
            <thead>
                <tr>
                    <th align="center" width="25">Pilih</th>
                    <th>Sub Tema</th>
                    <th>Jumlah Soal</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td><input type="checkbox" name="record"></td>
                    <td></td>
                    <td></td>
                </tr>
                @if($subtema_jadwal_count == 0)
                <tr>
                    <td colspan="3" align="center">Tambahkan Sub Tema Ujian</td>
                </tr>
                @endif
            </tbody>
        </table>
        <button type="button" class="delete-row">Delete Row</button>

<script type="text/javascript"> 
$(document).ready(function(){$(".add-row").click(function(){
            var id_subtema = $("#id_subtema").val();
            var jumlah_soal = $("#jumlah_soal").val();
            var markup = "<tr><td><input type='checkbox' name='record'></td><td>" + id_subtema + "</td><td>" + jumlah_soal + "</td></tr>";
            $("table tbody").append(markup);
        });

        // Find and remove selected table rows
        $(".delete-row").click(function(){
            $("table tbody").find('input[name="record"]').each(function(){
                if($(this).is(":checked")){
                    $(this).parents("tr").remove();
                }
            });
        });
    });</script>

but my source when running nothing happened. I need help, how to fix this problem.

via Chebli Mohamed