Bootstrap中如何将下拉菜单精准定位在文本框右侧（折叠面板场景）

需求：在Bootstrap折叠面板（accordion）的按钮内，实现flex横向布局的文本框+右侧下拉菜单，下拉菜单需对齐到折叠面板的右侧边缘（参考示意图）。

修改后的完整代码 #

<html>
<head>
  <style>
    .accordion {
      margin: 30px;
    }
    
    .accordion-button.collapsed {
      border-bottom: #ccc 1px solid;
    }
    
    .accordion-body {
      border-left: #673ab744 1px solid;
      border-bottom: #673ab744 1px solid;
      border-right: #673ab744 1px solid;
    }
    
    .flx-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    /* 调整下拉菜单定位，对齐到面板右侧 */
    .accordion-item .dropdown-menu {
      right: 0;
      left: auto;
    }
  </style>
</head>
<body>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Zenh87qX5JnK2Jl0vWa8Ck2rdkQ2Bzep5IDxbcnCeuOxjzrPF/et3URy9Bv1WTRi" crossorigin="anonymous">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-OERcA2EqjJCMA+/3y+gxIOqMEjwtxJY7qPCqsdltbNJuaOe923+mo//f6V8Qbsw3" crossorigin="anonymous"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js"></script>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@48,400,0,0">

  <div class="accordion accordion-flush" id="accordionFlushExample">
    <div class="accordion-item">
      <h2 class="accordion-header" id="flush-headingOne">
        <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseOne" aria-expanded="false" aria-controls="flush-collapseOne">
          <div class="flx-row">          
            <div>
              <input type="textbox" value="Accordion Item #1">
            </div>
            <div class="btn-group">
              <button type="button" class="btn btn-sm dropdown-toggle" data-bs-toggle="dropdown" aria-expanded="false"> More </button>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Export</a></li>
                <li><a class="dropdown-item" href="#">Duplicate</a></li>
                <li><a class="dropdown-item tdelete" href="#">Delete</a></li>
              </ul>
            </div>
          </div>
          <div class="mt-2">
            <span>Desc goes here</span><br>
            <span>Desc goes here</span>
          </div>
        </button>
      </h2>
      <div id="flush-collapseOne" class="accordion-collapse collapse" aria-labelledby="flush-headingOne" data-bs-parent="#accordionFlushExample">
        <div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the first item's accordion body.</div>
      </div>
    </div>
    <div class="accordion-item">
      <h2 class="accordion-header" id="flush-headingTwo">
        <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseTwo" aria-expanded="false" aria-controls="flush-collapseTwo">
          Accordion Item #2
        </button>
      </h2>
      <div id="flush-collapseTwo" class="accordion-collapse collapse" aria-labelledby="flush-headingTwo" data-bs-parent="#accordionFlushExample">
        <div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the second item's accordion body. Let's imagine this being filled with some actual content.</div>
      </div>
    </div>
  </div>

  <script type="text/javascript">
    $(".tdelete").off().on('click', function(event) {
      if (confirm(`Are you sure to delete the workflow ${$(this).closest('.accordion-button').find('input').val()}?`) == true) {
        $(this).closest('.accordion-item').remove();
      }
      event.preventDefault();
      event.stopPropagation();
    });
  </script>
</body>
</html>

关键修改点说明 #

• 移除了.accordion-button的display: inline!important，恢复按钮默认的块级布局，确保内部flex容器能占满宽度
• 给.flx-row添加width: 100%和align-items: center，让文本框和下拉按钮在同一行垂直居中，且占满按钮宽度
• 调整下拉菜单的定位：通过.accordion-item .dropdown-menu设置right: 0; left: auto;，强制下拉菜单对齐到折叠面板的右侧边缘
• 重构按钮内部的描述文本结构，用mt-2类添加间距，避免原有的<br>导致布局混乱
• 修正了删除按钮的jQuery选择器，优化了获取输入框值的逻辑，提升代码健壮性

内容的提问来源于stack exchange，提问作者Code Guy