源代碼
點擊運行
<!DOCTYPE html> <html> <head> <title>Bootstrap 實例</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/4.1.0/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/1.12.5/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.1.0/js/bootstrap.min.js"></script> </head> <body> <nav class="navbar navbar-expand-sm bg-dark navbar-dark"> <form class="form-inline"> <div class="input-group"> <span class="input-group-addon">@</span> <input type="text" class="form-control" placeholder="Username"> </div> </form> </nav> <br> <div class="container"> <h3>導航表單</h3> <p> .input-group-addon 類用於在輸入框前添加小標籤。</p> </div> </body> </html>
運行結果