Bootstrap 4添加悬停框阴影问题

时间：2019-10-17 03:38:00

标签： html css bootstrap-4

我使用了bootstrap 4，我试图将列表悬停添加到某些框阴影选项中，但是它出现在所有文本和图像中，您可以在代码段之后看到它的问题，

任何人都知道如何正确添加

这是我的 css代码 

.my-lst :hover{
/*  transform: scale(1.04);*/
 cursor: pointer;
box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);

}

谢谢

.my-lst :hover{
/*  transform: scale(1.04);*/
 cursor: pointer;
box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);

}
<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>



<main role="main" class="container">


  <div class="my-3 p-3 bg-white my-lst  rounded shadow-sm">
  
    <div class="media text-muted border-bottom  pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125 border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst  border-bottom pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst pt-3 border-bottom">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    
  </div>
</main>

6 个答案:

答案 0 :(得分：2)

请在lst之后删除空格，
.my-lst：hover

代码将是这种类型，
.my-lst:hover

答案 1 :(得分：1)

检查它是否仅在添加类“ my-lst”的地方起作用。

.my-lst:hover{
/*  transform: scale(1.04);*/
 cursor: pointer;
box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);

}
<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>



<main role="main" class="container">


  <div class="my-3 p-3 bg-white my-lst  rounded shadow-sm">
  
    <div class="media text-muted border-bottom  pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125 border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst  border-bottom pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst pt-3 border-bottom">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    
  </div>
</main>

答案 2 :(得分：1)

my-lst类在您的HTML代码中多次显示，这意味着您的所有CSS都将应用于my-lst的所有实例。在需要悬停效果的容器中添加标签，然后在CSS中而不是在类中调用该标签。

答案 3 :(得分：1)

选择器.my-lst :hover面向:hover的所有后代的.my-lst伪类。它不仅针对<div>类media-body，还针对它的<strong>和<a>子级。

要仅定位框，您要寻找 direct 后代选择器（ child combinator ）>：

.my-lst > :hover {
  /*  transform: scale(1.04);*/
  cursor: pointer;
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
}
<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>



<main role="main" class="container">


  <div class="my-3 p-3 bg-white my-lst  rounded shadow-sm">

    <div class="media text-muted border-bottom  pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125 border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst  border-bottom pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst pt-3 border-bottom">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>

  </div>
</main>

答案 4 :(得分：1)

在代码段中对此进行检查

.my-lst:hover{
/*  transform: scale(1.04);*/
 cursor: pointer;
box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);

}
<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>



<main role="main" class="container">


  <div class="my-3 p-3 bg-white my-lst  rounded shadow-sm">
  
    <div class="media text-muted my-lst  border-bottom  pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125 border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst  border-bottom pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst pt-3 border-bottom">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    
  </div>
</main>

答案 5 :(得分：1)

您需要删除类名和pseudu-class之间的空格。

.my-lst :hover 到.my-lst:hover 

.my-lst:hover {
  /*  transform: scale(1.04);*/
  cursor: pointer;
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.16), 0 2px 10px 0 rgba(0, 0, 0, 0.12);
}
<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>



<main role="main" class="container">


  <div class="my-3 p-3 bg-white my-lst  rounded shadow-sm">

    <div class="media text-muted border-bottom  pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125 border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst  border-bottom pt-3">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>
    <div class="media text-muted my-lst pt-3 border-bottom">
      <svg class="bd-placeholder-img mr-2 rounded" width="32" height="32" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 32x32"><title>Placeholder</title><rect width="100%" height="100%" fill="#007bff"/><text x="50%" y="50%" fill="#007bff" dy=".3em">32x32</text></svg>
      <div class="media-body pb-3 mb-0 small lh-125  border-gray">
        <div class="d-flex justify-content-between align-items-center w-100">
          <strong class="text-gray-dark">Full Name</strong>
          <a href="#">Follow</a>
        </div>
        <span class="d-block">@username</span>
      </div>
    </div>

  </div>
</main>

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