编程教程示范演示-小库网

Bootstrap 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
  <script src="https://cdn.staticfile.net/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://cdn.staticfile.net/popper.js/1.15.0/umd/popper.min.js"></script>
  <script src="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>

<div class="container">
  <h2>表单控件: select</h2>
  <p>以下表单包含了两个下拉菜单 (select 列表):</p>
  <form>
    <div class="form-group">
      <label for="sel1">单选下拉菜单:</label>
      <select class="form-control" id="sel1">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
      </select>
      <br>
      <label for="sel2">多选下拉菜单(按住 shift 键，可以选取多个选项):</label>
      <select multiple class="form-control" id="sel2">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
      </select>
    </div>
  </form>
</div>