Bootstrap 4默认选项卡窗格活动淡入功能不起作用

Question

在研究动态导航标签的过程中,我决定在用户​​点击他们选择的标签时添加淡入效果.

当模态首次加载时,html的以下行使故障显示HOME选项卡.

<div id="home" class="tab-pane active">

以上工作正常,但......

如果我用以下的html代码替换上面的代码...

<div id="home" class="tab-pane active fade in">

当模态首次加载时,div home 不会淡入.它仅在用户单击其他选项卡然后返回HOME选项卡时才起作用.

我的问题是,这种行为是否正常？

<!-- 1. BOOTSTRAP v4.0.0         CSS !-->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<!-- 2. GOOGLE JQUERY JS v3.2.1  JS !-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- 3. BOOTSTRAP v4.0.0         JS !-->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<!-- Toggleable / Dynamic Tabs -->

<nav class="nav nav-tabs nav-justified">
<a class="nav-item nav-link active" data-toggle="tab" href="#home">Home</a>
<a class="nav-item nav-link" data-toggle="tab" href="#menu1">Menu 1</a>
<a class="nav-item nav-link" data-toggle="tab" href="#menu2">Menu 2</a>
<a class="nav-item nav-link disabled" data-toggle="tab" href="#menu3">Disabled</a>
</nav>

<div class="tab-content">
<div id="home" class="tab-pane active fade in">
<h3>HOME</h3>
<p>Some content in menu HOME.</p>
</div>
<div id="menu1" class="tab-pane fade">
<h3>Menu 1</h3>
<p>Some content in menu 1.</p>
</div>
<div id="menu2" class="tab-pane fade">
<h3>Menu 2</h3>
<p>Some content in menu 2.</p>
</div>
<div id="menu3" class="tab-pane fade">
<h3>Menu 3</h3>
<p>Some content in menu 3.</p>
</div>
</div>

Answer 1

使用fade show而不是fade in在tab-content类中

参考 https://getbootstrap.com/docs/4.0/components/navs/?#javascript-behavior

这是在bootstrap 4上解决它的方法.但是在bootstrap 3中,你的代码应该正常工作.

bootstrap的相关问题3. Bootstrap选项卡 - 活动类不能处理页面加载

<!-- 1. BOOTSTRAP v4.0.0         CSS !-->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<!-- 2. GOOGLE JQUERY JS v3.2.1  JS !-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- 3. BOOTSTRAP v4.0.0         JS !-->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<!-- Toggleable / Dynamic Tabs -->

<nav class="nav nav-tabs nav-justified">
  <a class="nav-item nav-link active" data-toggle="tab" href="#home">Home</a>
  <a class="nav-item nav-link" data-toggle="tab" href="#menu1">Menu 1</a>
  <a class="nav-item nav-link" data-toggle="tab" href="#menu2">Menu 2</a>
  <a class="nav-item nav-link disabled" data-toggle="tab" href="#menu3">Disabled</a>
</nav>

<div class="tab-content">
  <div id="home" class="tab-pane fade show active">
    <h3>HOME</h3>
    <p>Some content in menu HOME.</p>
  </div>
  <div id="menu1" class="tab-pane fade">
    <h3>Menu 1</h3>
    <p>Some content in menu 1.</p>
  </div>
  <div id="menu2" class="tab-pane fade">
    <h3>Menu 2</h3>
    <p>Some content in menu 2.</p>
  </div>
  <div id="menu3" class="tab-pane fade">
    <h3>Menu 3</h3>
    <p>Some content in menu 3.</p>
  </div>
</div>