Bootstrap手风琴咏叹调扩展不起作用

Question

我正在使用bootstrap 4手风琴。我希望作为初始状态让所有卡片都崩溃了。我将咏叹调扩大为假，但所有卡片都展开了。

<div id="accordion">
            <!-- ko foreach: $root.Addons() -->
            <div class="card">
                <div class="card-header" id="headingOne">
                    <h5 class="mb-0">
                        <button class="btn btn-link" data-toggle="collapse" aria-expanded="false" data-bind="text:name, attr: { 'data-target': '#collapsible' +  $index(),'aria-controls': 'collapsible' +  $index() }"></button>
                    </h5>
                </div>
                <div data-bind="attr: { id: 'collapsible' + $index() }" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
                    <div class="card-body">
                        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
                    </div>
                </div>
            </div>
            <!-- /ko -->
        </div>

我做错了什么？

Answer 1

您需要更新处于折叠状态的类。

1）在按钮元素中添加带collapsed的类btn btn-link

2）从div元素中的show中删除类collapse show

我已使用上述更改更新了代码。它应该使手风琴最初保持在折叠状态。

<div id="accordion">
            <!-- ko foreach: $root.Addons() -->
            <div class="card">
                <div class="card-header" id="headingOne">
                    <h5 class="mb-0">
                        <button class="btn btn-link collapsed" data-toggle="collapse" aria-expanded="false" data-bind="text:name, attr: { 'data-target': '#collapsible' +  $index(),'aria-controls': 'collapsible' +  $index() }"></button>
                    </h5>
                </div>
                <div data-bind="attr: { id: 'collapsible' + $index() }" class="collapse" aria-labelledby="headingOne" data-parent="#accordion">
                    <div class="card-body">
                        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
                    </div>
                </div>
            </div>
            <!-- /ko -->
        </div>