Bootstrap导航栏显示为垂直而非水平

Question

我正在使用CodePen进行项目工作，我正在使用引导来创建导航栏。但由于某种原因，它垂直显示而不是水平显示。即使我复制并粘贴W3Schools示例和Bootstrap website中的代码。我不知道还有什么要做。请帮忙。

---

这是W3Schools的示例代码：

<nav class="navbar navbar-default"> 
     <div class="container-fluid"> 
     <div class="navbar-header"> 
      <a class="navbar-brand" href="#">WebSiteName</a> 
     </div> 
     <ul class="nav navbar-nav"> 
      <li class="active"><a href="#">Home</a></li> 
      <li><a href="#">Page 1</a></li> 
      <li><a href="#">Page 2</a></li> 
      <li><a href="#">Page 3</a></li> 
     </ul> 
     </div> 

---

这是从引导网站示例代码：

<nav class="navbar navbar-default"> 
     <div class="container-fluid"> 
<!-- Brand and toggle get grouped for better mobile display --> 
<div class="navbar-header"> 
    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> 
    <span class="sr-only">Toggle navigation</span> 
    <span class="icon-bar"></span> 
    <span class="icon-bar"></span> 
    <span class="icon-bar"></span> 
    </button> 
    <a class="navbar-brand" href="#">Brand</a> 
</div> 

<!-- Collect the nav links, forms, and other content for toggling --> 
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> 
    <ul class="nav navbar-nav"> 
    <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li> 
    <li><a href="#">Link</a></li> 
    <li class="dropdown"> 
     <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a> 
     <ul class="dropdown-menu"> 
     <li><a href="#">Action</a></li> 
     <li><a href="#">Another action</a></li> 
     <li><a href="#">Something else here</a></li> 
     <li role="separator" class="divider"></li> 
     <li><a href="#">Separated link</a></li> 
     <li role="separator" class="divider"></li> 
     <li><a href="#">One more separated link</a></li> 
     </ul> 
    </li> 
    </ul> 
    <form class="navbar-form navbar-left"> 
    <div class="form-group"> 
     <input type="text" class="form-control" placeholder="Search"> 
    </div> 
    <button type="submit" class="btn btn-default">Submit</button> 
    </form> 
    <ul class="nav navbar-nav navbar-right"> 
    <li><a href="#">Link</a></li> 
    <li class="dropdown"> 
     <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a> 
     <ul class="dropdown-menu"> 
     <li><a href="#">Action</a></li> 
     <li><a href="#">Another action</a></li> 
     <li><a href="#">Something else here</a></li> 
     <li role="separator" class="divider"></li> 
     <li><a href="#">Separated link</a></li> 
     </ul> 
    </li> 
    </ul> 
</div><!-- /.navbar-collapse --> 

---

两者都不起作用。是的，我已经三次检查了我的<link>和<script>标签。

编辑：here is my CodePen

Answer 1

首先像你正在使用引导3标记的意见，并要链接到两个引导3 4删除引导4 CSS。然后，你需要有与类的collapse navbar-collapse股利所以只需添加这是有nav就像ID股利如下：

<nav class="navbar navbar-inverse"> 
    <div class="container-fluid"> 

    <div class="navbar-header"> 
     <a class="navbar-brand" href="#about"> 
     <span style="font-family: 'Source Code Pro', Monospace; color:green"><i class="fa fa-code"></i>Ryan</span></a> 
    </div> 
    <div class="collapse navbar-collapse" id="nav"> 
    <ul class="nav navbar-nav"> 
     <li><a href="#about">About</a></li> 
     <li><a href="#portfolio">Portfolio</a></li> 
     <li><a href="#contact">Contact</a></li> 
    </ul> 
    </div> 
    </div> 
</nav> 

您可能要崩溃按钮添加到导航栏标题为否则你的链接不会显示在移动宽度，所以它看起来像：

<nav class="navbar navbar-inverse"> 
    <div class="container-fluid"> 
    <div class="navbar-header"> 
     <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#nav" aria-expanded="false"> 
     <span class="sr-only">Toggle navigation</span> 
     <span class="icon-bar"></span> 
     <span class="icon-bar"></span> 
     <span class="icon-bar"></span> 
     </button> 
     <a class="navbar-brand" href="#about"> 
     <span style="font-family: 'Source Code Pro', Monospace; color:green"><i class="fa fa-code"></i>Ryan</span> 
     </a> 
    </div> 
    <div class="collapse navbar-collapse" id="nav"> 
    <ul class="nav navbar-nav"> 
     <li><a href="#about">About</a></li> 
     <li><a href="#portfolio">Portfolio</a></li> 
     <li><a href="#contact">Contact</a></li> 
    </ul> 
    </div> 
    </div> 
</nav> 

Answer 2

正如有人说的 - 从加载CSS文件中删除的自举4，它会工作