Question

嗨，我有一个导航栏，它一旦展开就不会折叠。

如果任何人都可以看一下我的代码并给我一些建议，那将对我有很大帮助。

  <nav class="navbar navbar-expand-lg navbar-light bg-light border-bottom">
    <button class="btn btn-primary" id="menu-toggle">Show Rooms</button>

    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav ml-auto mt-2 mt-lg-0">
        <li class="nav-item active">
          {% if session['username'] %}
          <a id='change_username_btn' class="nav-link" href="#">{{ session['username'] }} <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href= "{{ url_for('logout') }}">Log Out</a>
        </li>

          {% else %}
          <li class="nav-item active">
              <a data-toggle="modal" data-target="#exampleModalCenter" id='change_username_btn' class="nav-link" href="#">Click Here to Enter Username<span class="sr-only">(current)</span></a>
          </li>

          {% endif %}
      </ul>
    </div>
  </nav>

Answer 1

您的代码有一个简单的问题。您正尝试折叠响应式导航栏，以使其无法正常折叠。您必须删除navbar-collapse类以防止响应。

尝试一下（我没有更改您的设计）：

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet"/>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>

 <nav class="navbar navbar-expand-lg navbar-light bg-light border-bottom">
    <button class="btn btn-primary" id="menu-toggle">Show Rooms</button>

     <button type="button" class="navbar-toggler collapsed" data-toggle="collapse" data-target="#navbarSupportedContent" aria-expanded="false" aria-controls="navbar">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse" id="navbarSupportedContent">
      <ul class="navbar-nav">
        <li class="nav-item">
          <a id='change_username_btn' class="nav-link" href="#">Name <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href= "{{ url_for('logout') }}">Log Out</a>
        </li>

      </ul>
    </div>
  </nav>

</body>
</html>

展开后导航栏切换不会折叠

1 个答案: