    <div class="fs-10 fc-surf-t">
                        checkbox id and label for must have same value, i.e. menu1.
                    </div>

                    <details class="expandable mt-sm">
                        <summary class="fs-10 fc-surf-t">View Source</summary>
                        <div class="content">
                            <div class="dark-gist-container">
                                <script
                                    src="https://gist.github.com/skpaul/46e54babd290