html运行实例（bs_navbar_brand

代码示例：（标识：bs_navbar_brand_2）
<!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>

<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">
      <img src="/static/demo/images/avatar.png" alt="Logo" style="width:40px;" class="rounded-pill">
    </a>
  </div>
</nav>

<div class="container-fluid mt-3">
  <h3>品牌 / 标志</h3>
  <p>如果将 .navbar-brand 类与图像一起使用时，Bootstrap 5 将自动设置图像样式，在垂直方向适应导航栏。</p>
</div>

</body>
</html>