代码示例:(标识:bs_utility_float)
<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/js/bootstrap.bundle.js"></script>
</head>
<body>

<div class="p-4">
  <h2>浮动和清除浮动</h2>
  <p>使用 .float-end 类向右浮动元素,或使用 .float-start 向左浮动,并使用 .clearfix 类清除浮动:</p> 
  <div class="clearfix">
    <span class="float-start">向左浮动</span>
    <span class="float-end">向右浮动</span>
  </div>
</div>

</body>
</html>
运行结果: