jQuery DataTables: How to expand/collapse all child rows - Responsive extension

Example for article at https://www.gyrocode.com/articles/jquery-datatables-how-to-expand-collapse-all-child-rows/

by dmheropro

HTML

<link rel="stylesheet" href="https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.1/datatables.min.css">
<script src="https://cdn.datatables.net/v/dt/dt-1.10.16/r-2.2.1/datatables.min.js"></script>


<button id="btn-show-all-children" type="button">Expand All</button>
<button id="btn-hide-all-children" type="button">Collapse All</button>
<hr>
<table id="example" class="display" cellspacing="0" width="100%">
    <thead>
        <tr>
            <th>Name</th>
            <th>Position</th>
            <th>Office</th>
            <th class="none">Age</th>
            <th class="none">Start date</th>
            <th class="none">Salary</th>
        </tr>
    </thead>
    <tfoot>
        <tr>
            <th>Name</th>
            <th>Position</th>
            <th>Office</th>
            <th>Age</th>
            <th>Start date</th>
            <th>Salary</th>
        </tr>
    </tfoot>
    <tbody>
        <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>
        <tr>
            <td>Ashton Cox</td>
            <td>Junior Technical Author</td>
            <td>San Francisco</td>
            <td>66</td>
            <td>2009/01/12</td>
            <td>$86,000</td>
        </tr>
        <tr>
            <td>Bradley Greer</td>
            <td>Software Engineer</td>
            <td>London</td>
            <td>41</td>
            <td>2012/10/13</td>
            <td>$132,000</td>
        </tr>

    </tbody>
</table>

JavaScript

$(document).ready(function (){
    var table = $('#example').DataTable({
        'responsive': true
    });

    // Handle click on "Expand All" button
    $('#btn-show-all-children').on('click', function(){
        // Expand row details
        table.rows(':not(.parent)').nodes().to$().find('td:first-child').trigger('click');
    });

    // Handle click on "Collapse All" button
    $('#btn-hide-all-children').on('click', function(){
        // Collapse row details
        table.rows('.parent').nodes().to$().find('td:first-child').trigger('click');
    });
});