引导折叠/展开具有不同折叠状态的多个目标答案

【问题标题】：Bootstrap collapse/expand multiple targets with different collapse states引导折叠/展开具有不同折叠状态的多个目标
【发布时间】：2021-05-19 06:41:57
【问题描述】：

在引导文档中，有一个如何切换单个和多个目标的示例，请参阅https://getbootstrap.com/docs/4.0/components/collapse/?#multiple-targets。

单击“切换第一个元素”然后单击“切换两个元素”时，两个元素的状态不匹配，例如一个倒塌另一个没有。

如何实现在单击“切换两个元素”时折叠/显示两个/多个元素，无论元素之前的状态如何。

【问题讨论】：

标签： javascript html css twitter-bootstrap

【解决方案1】：

所以在Dealish Teppes 提示之后，我想出了这个解决方案。请注意删除数据目标并在“切换两者”按钮上添加 id。

var toggle_all = $('#toggle_all')
toggle_all.on('click', function(event) {
  if (toggle_all.attr("aria-expanded") === 'false') {
    $('.multi-collapse').collapse('show')
    toggle_all.attr('aria-expanded', 'true');
  } else {
    $('.multi-collapse').collapse('hide')
    toggle_all.attr('aria-expanded', 'false');
  }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.0/jquery.min.js"></script>
<!doctype html>
<html lang="en">

<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

  <title>Bootstrap Card Example</title>
</head>

<body>
  <p>
    <a class="btn btn-primary" data-toggle="collapse" href="#multiCollapseExample1" role="button" aria-expanded="false" aria-controls="multiCollapseExample1">Toggle first element</a>
    <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#multiCollapseExample2" aria-expanded="false" aria-controls="multiCollapseExample2">Toggle second element</button>
    <button id="toggle_all" class="btn btn-primary" type="button" data-toggle="collapse" aria-expanded="false" aria-controls="multiCollapseExample1 multiCollapseExample2">Toggle both elements</button>
  </p>
  <div class="row">
    <div class="col">
      <div class="collapse multi-collapse" id="multiCollapseExample1">
        <div class="card card-body">
          Some placeholder content for the first collapse component of this multi-collapse example. This panel is hidden by default but revealed when the user activates the relevant trigger.
        </div>
      </div>
    </div>
    <div class="col">
      <div class="collapse multi-collapse" id="multiCollapseExample2">
        <div class="card card-body">
          Some placeholder content for the second collapse component of this multi-collapse example. This panel is hidden by default but revealed when the user activates the relevant trigger.
        </div>
      </div>
    </div>
  </div>

  <!-- Optional JavaScript -->
  <!-- jQuery first, then Popper.js, then Bootstrap JS -->
  <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>

</html>

【讨论】：