代码示例:(标识:bs_flex-inline)
<!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>行内弹性框</h2>
  <p>如需创建行内 flexbox 容器,请使用 d-inline-flex 类:</p>
  <div class="d-inline-flex p-3 bg-secondary text-white">  
    <div class="p-2 bg-info">弹性项目 1</div>
    <div class="p-2 bg-warning">弹性项目 2</div>
    <div class="p-2 bg-primary">弹性项目 3</div>
  </div>
</div>

</body>
</html>
运行结果: