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html - 为 Bootstrap 4 模态标题添加字幕

问题描述

我正在使用从 Bootstrap (4.4)示例创建的简单模式窗口。

它包括一个模态标题 div：

<div class="modal-header">
    <h5 class="modal-title">Modal title</h5>
    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
      <span aria-hidden="true">&times;</span>
    </button>
</div>

我想在 h5 下方添加一个字幕，但我不知道“modal-header”类如何将此 div 定义为 flex。

我所有的尝试都以这个 h5 标题旁边的内容结束。

标签： htmlcssbootstrap-4flexboxbootstrap-modal

解决方案

它很容易

弹性列

只需在模态标题上添加flex-column类。但在这种情况下，您需要通过绝对位置调整关闭按钮，使其父级相对。

<div class="modal-header flex-column position-relative">
    <h5 class="modal-title">Modal title</h5>
    <button type="button" class="close position-absolute" data-dismiss="modal" aria-label="Close" style="top: 10px;right: 10px;">
     <span aria-hidden="true">&times;</span>
    </button>
</div>

还要检查工作示例。

.close {
  top: 10px;right: 10px; 
}
.modal-header {padding-right: 30px;}
<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>Modal Example</h2>
  <!-- Button to Open the Modal -->
  <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
    Open modal
  </button>

  <!-- The Modal -->
  <div class="modal" id="myModal">
    <div class="modal-dialog">
      <div class="modal-content">
      
        <!-- Modal Header -->
        <div class="modal-header flex-column position-relative">
        <h5 class="modal-title">Modal title 1Modal title 1Modal title 1Modal title 1Modal title 1Modal title 1Modal title 1Modal title 1Modal title 1Modal title 1</h5>
<h5 class="modal-title">Modal title 2</h5>
        <button type="button" class="close position-absolute" data-dismiss="modal" aria-label="Close">
         <span aria-hidden="true">&times;</span>
        </button>
    </div>
        
        <!-- Modal body -->
        <div class="modal-body">
          Modal body..
        </div>
        
        <!-- Modal footer -->
        <div class="modal-footer">
          <button type="button" class="btn btn-danger" data-dismiss="modal">Close</button>
        </div>
        
      </div>
    </div>
  </div>
  
</div>

</body>
</html>

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