点击运行
<!DOCTYPE html> <html> <head> <title>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.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>表单控件: input</h2> <p>以下实例使用两个 input 元素，一个是 text，一个是 password ：</p> <form> <div class="form-group"> <label for="usr">用户名:</label> <input type="text" class="form-control" id="usr"> </div> <div class="form-group"> <label for="pwd">密码:</label> <input type="password" class="form-control" id="pwd"> </div> </form> </div> </body> </html>
运行结果
