bootstrap 手风琴默认显示在桌面上，默认隐藏在移动设备上

Question

我是引导程序的新手，所以我不确定我会怎么做。

我有一个简单的引导手风琴，就像在这个片段中一样。 它被分成多个手风琴，因为我希望它们能够彼此独立地展开和折叠。 （因为可以展开并显示所有项目或不显示所有项目，而不仅仅是一个展开而其他项目折叠）

我想禁用桌面上的展开和折叠，并确保显示每个项目。 但是在移动设备上，我只想显示第一个项目，默认情况下其他项目折叠。

任何关于我如何实现这一目标的建议将不胜感激。

 <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous"> <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script> <div id="accordion"> <div class="card"> <div class="card-header" id="heading1"> <button class="btn btn-default" data-toggle="collapse" data-target="#body1" aria-expanded="true" aria-controls="body1"> //heading </button> </div> <div id="body1" class="collapse show" aria-labelledby="heading1" data-parent="#accordion"> <div class="product card-body"> //content </div> </div> </div> </div> <div id="accordion"> <div class="card"> <div class="card-header" id="heading2"> <button class="btn btn-default" data-toggle="collapse" data-target="#body2" aria-expanded="true" aria-controls="body2"> //heading </button> </div> <div id="body2" class="collapse show" aria-labelledby="heading2" data-parent="#accordion"> <div class="product card-body"> //content </div> </div> </div> </div> <div id="accordion"> <div class="card"> <div class="card-header" id="heading3"> <button class="btn btn-default" data-toggle="collapse" data-target="#body3" aria-expanded="true" aria-controls="body3"> //heading </button> </div> <div id="body3" class="collapse show" aria-labelledby="heading3" data-parent="#accordion"> <div class="product card-body"> //content </div> </div> </div> </div>

Answer 1

我已经找到了解决方案，请查看下面

桌面版 CSS

.modified-accordion .card-header{ position: relative;}
.modified-accordion .card-header:after{ content: ''; position: absolute; width: 100%; 
 height: 100%; left: 0; top: 0;}
.modified-accordion .collapse:not(.show){ display: block;}

移动端 CSS

@media (max-width: 767px) {
.modified-accordion .collapse:not(.show){ display: none;}
.modified-accordion .card-header:after{ display: none;}
}

HTML 结构

<div class="accordion modified-accordion">
  <div class="card">
    <div class="card-header" id="headingOne">
      <h2 class="mb-0">
        <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">Collapsible Group Item #1</button>
      </h2>
    </div>

    <div id="collapseOne" class="collapse show" aria-labelledby="headingOne">
      <div class="card-body">Contect-1</div>
    </div>
  </div>
</div>

<div class="accordion modified-accordion">
  <div class="card">
    <div class="card-header" id="headingTwo">
      <h2 class="mb-0">
        <button class="btn btn-link collapsed" type="button" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">Collapsible Group Item #2</button>
      </h2>
    </div>
    <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo">
      <div class="card-body">Content-2</div>
    </div>
  </div>
</div>

<div class="accordion modified-accordion">
  <div class="card">
    <div class="card-header" id="headingThree">
      <h2 class="mb-0">
        <button class="btn btn-link collapsed" type="button" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree"> Collapsible Group Item #3</button>
      </h2>
    </div>
    <div id="collapseThree" class="collapse" aria-labelledby="headingThree">
      <div class="card-body">Content-3</div>
    </div>
  </div>
</div>