jQuery Datatables responsive example

HTML

<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<link rel="stylesheet" href="//cdn.datatables.net/1.10.1/css/jquery.dataTables.css">
<script src="//cdn.datatables.net/1.10.1/js/jquery.dataTables.min.js"></script>
<link rel="stylesheet" href="//cdn.datatables.net/responsive/1.0.0/css/dataTables.responsive.css">
<script src="//cdn.datatables.net/responsive/1.0.0/js/dataTables.responsive.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/css/bootstrap.css">
<table id="example" class="compact hover" cellspacing="0" width="100%">
        <thead>
            <tr>
                <th>Start date</th>
                <th>Salary</th>
                <th>Inner Table</th>
            </tr>
        </thead>
 
        <tbody>
            <tr>
                <td>2011/04/25</td>
                <td>$320,800</td>
                <td>
                    <table width="100%" class="table table-sm">
                      <thead>
                          <tr>
                              <th>Name</th>
                              <th>Buttons</th>

                          </tr>
                      </thead>
                        <tbody>
                            <tr>
                                <td>Tiger        Nixon</td>
                              <td>
                                  <input type="button" value="btn1">
                                  <input type="button" value="btn2">
                                  <input type="button" value="btn3">
                                </td>

                            </tr>
                            <tr>
                                <td>Garrett        Winters</td>
                                <td>
                                  <input type="button" value="btn1">
                                  <input type="button" value="btn2">
   ...

CSS

/* if this CSS is commented out, the table will not have the style-breaking issue,
but won't display correct number of spaces*/
table.dataTable td {
  white-space:pre;
}

JavaScript

$(document).ready(function() {
    $('#example').DataTable( {
        columnDefs: [
            { className: 'align-top', targets: '_all' }
        ],
    } );
} );