Bootstrap 4 个标签未换行

Question

问题发生在 alpha 6 而不是 alpha 5

在 bootstrap 中，3 个标签将换行到下一行，因此它们可以在较小的屏幕尺寸上使用。

在 Bootstrap 4 中，它们不会缠绕和戳出屏幕的一侧。这是 Bootstrap 4 文档中的示例。

我如何让它像 bootstrap 3 中那样包装？

#viewport
{
  width: 200px;
  border: 1px solid #000;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">

<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>

<div id="viewport">
<!-- Nav tabs -->
<ul class="nav nav-tabs" role="tablist">
  <li class="nav-item">
    <a class="nav-link active" data-toggle="tab" href="#home" role="tab">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#profile" role="tab">Profile</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#messages" role="tab">Messages</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#settings" role="tab">Settings</a>
  </li>
</ul>

<!-- Tab panes -->
<div class="tab-content">
  <div class="tab-pane active" id="home" role="tabpanel">...</div>
  <div class="tab-pane" id="profile" role="tabpanel">...</div>
  <div class="tab-pane" id="messages" role="tabpanel">...</div>
  <div class="tab-pane" id="settings" role="tabpanel">...</div>
</div>

</div>

（黑色轮廓显示小视口。在以前的版本中，选项卡会换行，因此所有内容都在黑线内可见）

Answer 1

似乎是您使用的 Bootstrap4 版本特有的问题：

#viewport
{
  width: 200px;
  border: 1px solid #000;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha/css/bootstrap.min.css" crossorigin="anonymous">

<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha/js/bootstrap.min.js" crossorigin="anonymous"></script>

<div id="viewport">
<!-- Nav tabs -->
<ul class="nav nav-tabs" role="tablist">
  <li class="nav-item">
    <a class="nav-link active" data-toggle="tab" href="#home">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#profile">Profile</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#messages">Messages</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" data-toggle="tab" href="#settings">Settings</a>
  </li>
</ul>

<!-- Tab panes -->
<div class="tab-content">
  <div class="tab-pane active" id="home" role="tabpanel">...</div>
  <div class="tab-pane" id="profile" role="tabpanel">...</div>
  <div class="tab-pane" id="messages" role="tabpanel">...</div>
  <div class="tab-pane" id="settings" role="tabpanel">...</div>
</div>

</div>

Answer 2

与其他组件一样，导航选项卡现在是 flexbox。只需使用 flex-wrap.

<ul class="nav nav-tabs flex-wrap" role="tablist">
        <li class="nav-item">
            <a class="nav-link active" data-toggle="tab" href="#home" role="tab">Home</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" data-toggle="tab" href="#profile" role="tab">Profile</a>
        </li>
        ...
</ul>

http://www.codeply.com/go/hGPyyOv76W

我不认为它是 "issue"，而是 "by design"。

另一种可能更具响应性的方法是使用 flex-column，但仅限于 xs 宽度。这种方式是垂直堆叠而不是环绕。

<ul class="nav nav-tabs flex-column flex-md-row" role="tablist">
         <li class="nav-item">
                    <a class="nav-link active" data-toggle="tab" href="#home" role="tab">Home</a>
         </li>
         <li class="nav-item">
                    <a class="nav-link" data-toggle="tab" href="#profile" role="tab">Profile</a>
         </li>
         ...
</ul>

Demo

Answer 3

对于 Bootstart 4.1.3，不要忘记包含 popper.js 例如

<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>

目前 W3school example 缺少 aria-controls。这个例子对我有用：

<div class="container">
  <h2>Navigation Tabs</h2>
  <p>Turn the nav menu into navigation tabs with the .nav nav-tabs class. Add the active class to the active/current link. If you want the tabs to be togglable, see the last example on the tutorial page.</p>
  <ul class="nav nav-tabs" id="myTab" role="tablist">
  <li class="nav-item">
    <a class="nav-link active" id="homes-tab" data-toggle="tab" href="#homes" role="tab" aria-controls="homes" aria-selected="true">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" id="profiles-tab" data-toggle="tab" href="#profiles" role="tab" aria-controls="profiles" aria-selected="false">Profile</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" id="contacts-tab" data-toggle="tab" href="#contacts" role="tab" aria-controls="contacts" aria-selected="false">Contact</a>
  </li>
</ul>
<div class="tab-content" id="myTabContent">
  <div class="tab-pane fade show active" id="homes" role="tabpanel" aria-labelledby="homes-tab">home</div>
  <div class="tab-pane fade" id="profiles" role="tabpanel" aria-labelledby="profiles-tab">profile</div>
  <div class="tab-pane fade" id="contacts" role="tabpanel" aria-labelledby="contacts-tab">contact</div>
</div>

Answer 4

如果您将 popper.js、id 和 aria-controls 添加为 documented，它似乎可以工作：

#viewport
{
  width: 200px;
  border: 1px solid #000;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">

<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>

<div id="viewport">
<!-- Nav tabs -->
<ul class="nav nav-tabs" role="tablist">
  <li class="nav-item">
    <a class="nav-link active" id="home-tab" data-toggle="tab" href="#home" role="tab" aria-controls="home" aria-selected="true">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" id="profiles-tab" data-toggle="tab" href="#profile" role="tab" aria-controls="profile" aria-selected="false">Profile</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" id="messages-tab" data-toggle="tab" href="#messages" role="tab" aria-controls="messages" aria-selected="false">Messages</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" id="settings-tab" data-toggle="tab" href="#settings" role="tab" aria-controls="settings" aria-selected="false">Settings</a>
  </li>
</ul>

<!-- Tab panes -->
<div class="tab-content">
  <div class="tab-pane active" id="home" role="tabpanel" aria-labelledby="home-tab">home</div>
  <div class="tab-pane" id="profile" role="tabpanel" aria-labelledby="profile-tab">profile</div>
  <div class="tab-pane" id="messages" role="tabpanel" aria-labelledby="messages-tab">messages</div>
  <div class="tab-pane" id="settings" role="tabpanel" aria-labelledby="settings-tab">settings</div>
</div>

</div>

Bootstrap 4 个标签未换行

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