<!-- BEGIN COPY / PASTE -->
        <div class="accordion" id="accordionExample">
            <div class="accordion-item">
                <h2 class="accordion-header" id="headingOne">
                    <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                        Accordion Item #1
                    </button>
                </h2>
                <div id="collapseOne" class="accordion-collapse collapse" aria-labelledby="headingOne" data-bs-parent="#accordionExample">
                    <div class="accordion-body">
                        This is the first item's accordion body.
                    </div>
                </div>
            </div>
        </div>

        <script>
            var collapseElement = document.getElementById('collapseOne');
            collapseElement.addEventListener('shown.bs.collapse', function () {
                console.log('Collapse has fully expanded.');
            });
        </script>
        <!-- END COPY / PASTE -->