Bootstrap 手风琴 aria-expanded 不起作用答案

【问题标题】：Bootstrap accordion aria-expanded doesnt workBootstrap 手风琴 aria-expanded 不起作用
【发布时间】：2019-08-09 21:08:39
【问题描述】：

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折叠起来。我将 aria-expanded 设置为 false，但所有卡片都显示为已展开。

<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？

【问题讨论】：

标签： twitter-bootstrap knockout.js accordion

【解决方案1】：

您需要更新处于折叠状态的类。

1) 在按钮元素中添加类collapsed 和btn btn-link

2) 从 div 元素中的 collapse show 中删除类 show

我已使用上述更改更新了代码。它最初应该使手风琴处于折叠状态。

<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>

【讨论】：