Question

我使用bootstrap编写导航栏的代码，但代码没有显示网页上的切换按钮。这是我的代码：

<!DOCTYPE html>

<head>
  <title>Bootstrap</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container-fluid">
    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    </button>

  </div>
</nav>



</body>
</html>

无法使用引导程序在导航选项卡中看到切换按钮（带条）

0 个答案: