源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://apps.bdimg.com/libs/jquerymobile/1.4.5/jquery.mobile-1.4.5.min.css"> <script src="https://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script> <script src="https://apps.bdimg.com/libs/jquerymobile/1.4.5/jquery.mobile-1.4.5.min.js"></script> </head> <body> <div data-role="page"> <div data-role="main" class="ui-content"> <form method="post" action="demoform.asp"> <p>在输入框中输入内容，查看输入框右侧是否出现 X 图标：</p> <label for="fname">姓名</label> <input type="text" name="fname" id="fname" data-clear-btn="true"> </form> </div> </div> </body> </html>
运行结果