Question

我有一组卡片，这些卡片由我的网站上的一个按钮显示。当我显示卡片时，卡片（我要显示的信息）周围有灰色小边框。我想删除此边框，但是在CSS中设置border: none;并没有做到这一点。

仅供参考：我正在使用Bootstrap 4.3.1（通过CDN）。

代码：

    <div id="skills" class="showcase-buttons">
      <button type="button" class="btn btn-primary btn-block" 
        data-toggle="collapse" href="#skills-showcase" aria-expanded="false"
        aria-controls="skills-showcase">
        Skills
      </button>

      <!-- collapsible content (skills) -->
      <div id="skills-showcase" class="collapse showcase-content justified-text">
        <div class="row justify-content-around">
          <div class="col-md-4">
            <div id="computer-skills">
              <div class="card card-body">
                <h3>Computer</h3>
                <p>
                  We'll put some happy little leaves here and there. If we're going to
                  have animals around we all have to be concerned about them and take
                  care of them. As trees get older they lose their chlorophyll. This
                  present moment is perfect simply due to the fact you're experiencing
                  it. Let's make some happy little clouds in our world.
                </p>
              </div>
            </div>
          </div>
          <div class="col-md-4">
            <div id="design-skills">
              <div class="card card-body">
                <h3>Design</h3>
                <p>
                  Put it in, leave it alone. Just let go - and fall like a little
                  waterfall. The more we do this - the more it will do good things to
                  our heart. Nature is so fantastic, enjoy it. Let it make you happy.
                  Trees grow in all kinds of ways. They're not all perfectly straight.
                  Not every limb is perfect. There are no limits in this world.
                </p>
              </div>
            </div>
          </div>
          <div class="col-md-4">
            <div id="problem-solving-skills">
              <div class="card card-body">
                <h3>Problem Solving</h3>
                <p>
                  If these lines aren't straight, your water's going to run right out of
                  your painting and get your floor wet. And I will hypnotize that just a
                  little bit. You need the dark in order to show the light. We don't
                  really know where this goes - and I'm not sure we really care. I get
                  carried away with this brush cleaning.
                </p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>

图片：

Answer 1

可能是您的缓存未清除。如果没有，您可以尝试一下，看看是否能解决问题：

.card {
    border: 0;
}

或：

<div class="card border-0">...</div>

Answer 2

我删除了技能按钮周围的边框和灰线，发生在单击事件上。

.card.card-body{ border:none; }

 .btn-primary.focus, .btn-primary:focus { box-shadow:unset !important;}
 
 .btn.focus, .btn:focus{ box-shadow:unset !important;}

<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="skills" class="showcase-buttons">
      <button type="button" class="btn btn-primary btn-block" 
        data-toggle="collapse" href="#skills-showcase" aria-expanded="false"
        aria-controls="skills-showcase">
        Skills
      </button>

      <!-- collapsible content (skills) -->
      <div id="skills-showcase" class="collapse showcase-content justified-text">
        <div class="row justify-content-around">
          <div class="col-md-4">
            <div id="computer-skills">
              <div class="card card-body">
                <h3>Computer</h3>
                <p>
                  We'll put some happy little leaves here and there. If we're going to
                  have animals around we all have to be concerned about them and take
                  care of them. As trees get older they lose their chlorophyll. This
                  present moment is perfect simply due to the fact you're experiencing
                  it. Let's make some happy little clouds in our world.
                </p>
              </div>
            </div>
          </div>
          <div class="col-md-4">
            <div id="design-skills">
              <div class="card card-body">
                <h3>Design</h3>
                <p>
                  Put it in, leave it alone. Just let go - and fall like a little
                  waterfall. The more we do this - the more it will do good things to
                  our heart. Nature is so fantastic, enjoy it. Let it make you happy.
                  Trees grow in all kinds of ways. They're not all perfectly straight.
                  Not every limb is perfect. There are no limits in this world.
                </p>
              </div>
            </div>
          </div>
          <div class="col-md-4">
            <div id="problem-solving-skills">
              <div class="card card-body">
                <h3>Problem Solving</h3>
                <p>
                  If these lines aren't straight, your water's going to run right out of
                  your painting and get your floor wet. And I will hypnotize that just a
                  little bit. You need the dark in order to show the light. We don't
                  really know where this goes - and I'm not sure we really care. I get
                  carried away with this brush cleaning.
                </p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>

移除可折叠式引导卡的边界

2 个答案: