​x
 
<!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 href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
​
<div class="container mt-3">
  <h1>关闭图标</h1>
  <p>请使用 .btn-close 类可设置关闭图标的样式。通常用于警告框和模态。</p>
  <div class="clearfix">
    <button type="button" class="close">&times;</button>
  </div>
</div>
​
</body>
</html>
​