Question

此代码用于部分内容折叠，但不适用于引导程序4。我在做什么错了？

#module {
  width: 500px;
}

#module p.collapse[aria-expanded="false"] {
  display: block;
  height: 40px !important;
  overflow: hidden;
}

#module p.collapsing[aria-expanded="false"] {
  height: 40px !important;
}

#module a.collapsed:after {
  content: '+ Show More';
}

#module a:not(.collapsed):after {
  content: '- Show Less';
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 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/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

<div id="module" class="container">
  <h3>Bacon Ipsum</h3>
  <p class="collapse" id="collapseExample" aria-expanded="false">Bacon ipsum dolor amet doner picanha tri-tip biltong leberkas salami meatball tongue filet mignon landjaeger tail. Kielbasa salami tenderloin picanha spare ribs, beef ribs strip steak jerky cow. Pork chop chicken ham hock beef ribs turkey jerky. Shoulder
    beef capicola doner, tongue tail sausage short ribs andouille. Rump frankfurter landjaeger t-bone, kielbasa doner ham hock shankle venison. Cupim capicola kielbasa t-bone, ball tip chicken andouille venison pork chop doner bacon beef ribs kevin shankle.
    Short loin leberkas tenderloin ground round shank, brisket strip steak ham hock ham.
  </p>
  <a role="button" class="collapsed" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample"></a>
</div>

Answer 1

在互联网上搜索了几个小时之后，我终于发现，要使以上代码与Bootstrap 4兼容，我们只需要对CSS进行如下修改：

#module {
  width: 500px;
}

#module a.collapsed:after {
  content: '+ Show More';
}

#module a:not(.collapsed):after {
  content: '- Show Less';
}

#module #collapseExample.collapse:not(.show) {
  display: block;
  /* height = lineheight * no of lines to display */
  height: 4.5em;
  overflow: hidden;
}

#module #collapseExample.collapsing {
  height: 4.5em;
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 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/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

<div id="module" class="container">
  <h3>Bacon Ipsum</h3>
  <p class="collapse" id="collapseExample" aria-expanded="false">Bacon ipsum dolor amet doner picanha tri-tip biltong leberkas salami meatball tongue filet mignon landjaeger tail. Kielbasa salami tenderloin picanha spare ribs, beef ribs strip steak jerky cow. Pork chop chicken ham hock beef ribs turkey jerky. Shoulder
    beef capicola doner, tongue tail sausage short ribs andouille. Rump frankfurter landjaeger t-bone, kielbasa doner ham hock shankle venison. Cupim capicola kielbasa t-bone, ball tip chicken andouille venison pork chop doner bacon beef ribs kevin shankle.
    Short loin leberkas tenderloin ground round shank, brisket strip steak ham hock ham.
  </p>
  <a role="button" class="collapsed" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample"></a>
</div>

Answer 2

我建议保持简洁，将一部分文本放在单独的段落中。这将使您可以非常精确地控制显示的文本。任何一种可编程的解决方案都将取决于字数，标点符号或仅按指定长度截断文本。

#module {
  width: 500px;
}

#module a.collapsed:after {
  content: '+ Show More';
}

#module a:not(.collapsed):after {
  content: '- Show Less';
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" 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/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

<div id="module" class="container">
  <h3>Bacon Ipsum</h3>
  <p class="excerpt">Bacon ipsum dolor amet doner picanha tri-tip biltong leberkas salami meatball tongue filet mignon landjaeger tail. Kielbasa salami tenderloin picanha spare ribs, beef ribs strip steak jerky cow. Pork chop chicken ham hock beef ribs turkey jerky.</p>
  <p class="collapse" id="collapseExample" aria-expanded="false"> Shoulder beef capicola doner, tongue tail sausage short ribs andouille. Rump frankfurter landjaeger t-bone, kielbasa doner ham hock shankle venison. Cupim capicola kielbasa t-bone, ball tip chicken andouille venison pork chop doner bacon beef ribs kevin
    shankle. Short loin leberkas tenderloin ground round shank, brisket strip steak ham hock ham.
  </p>
  <a role="button" class="collapsed" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample"></a>
</div>

Answer 3

这就是我以前用来部分展开和关闭的内容。这完全适用于Bootstrap4。您可以在此处下载示例HTML / CSS / JavaScript代码段：

https://iiiji.com/accordion-partial-collapse-expand-demo-template-bootstrap/

.partialcollapse .collapse {
    display: block;
    height: 120px !important;
    overflow: hidden;
}
.partialcollapse .collapsing {
    height: inherit!important;
}
.partialcollapse .collapse.show {
    height: auto !important;
} 
.partialcollapse .collapse+button:after {
    content: '+ Show More';
}
.partialcollapse .show+button:after, .partialcollapse .collapsing+button:after {
    content: '- Show Less';
}

<div class="accordion partialcollapse" id="partialcollapse">
  <div id="collapse-one" class="collapse" aria-labelledby="headingOne" data-parent="#partialcollapse">
    <h4>Accordion Title</h4>
    <p>Accordion content goes here</p>
  </div>
  <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#collapse-one" aria-expanded="true" aria-controls="collapse-one"> </button>
</div>

我们可以在引导程序4中使用局部折叠概念吗？

3 个答案: