代码示例:(标识:bs_form_textarea)
<!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>Textarea</h2>
  <p>也可以使用 .form-control 类来设置 textarea 的样式:</p>
  <form action="/index/demo/form_current.html">
    <div class="mb-3 mt-3">
      <label for="comment">Comments:</label>
      <textarea class="form-control" rows="5" id="comment" name="text">
运行结果: