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<!DOCTYPE html> <html> <head> <title>Bootstrap5 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container mt-3"> <h2>下拉菜单</h2> <p>在 Bootstrap5 中下拉菜单 select 元素可以使用 .form-select 类来渲染 :</p> <form action=""> <label for="sel1" class="form-label">单选下拉菜单：</label> <select class="form-select" id="sel1" name="sellist1"> <option>1</option> <option>2</option> <option>3</option> <option>4</option> </select> <br> <label for="sel2" class="form-label">多选下拉菜单：</label> <select multiple class="form-select" id="sel2" name="sellist2"> <option>1</option> <option>2</option> <option>3</option> <option>4</option> <option>5</option> </select> <button type="submit" class="btn btn-primary mt-3">Submit</button> </form> </div> </body> </html>
运行结果：