Navbar是垂直而不是水平的

Question

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
<div id="navigation">
   <nav class="navbar navbar-default">
      <ul class="nav navbar-nav">
         <li class="nav-item"><a class="nav-link" href="/">Home</a></li>
         <li class="nav-item"><a class="nav-link" href="/browse">Browse</a></li>
         <li class="nav-item"><a class="nav-link" href="/create">Create</a></li>
         <li class="nav-item"><a class="nav-link" href="/review">Review</a></li>
         <li class="nav-item"><a class="nav-link" href="/help">Help</a></li>
      </ul>
      <form class="form-inline">
         <a href="#" onclick="signOut();">Sign out</a>
         <div id="my-signin2">
            <!-- google oauth stuff -->
         </div>
      </form>
   </nav>
</div>

为什么这显示一个垂直列表而不是水平列表？

Answer 1

我删除了navbar-nav类，并再次水平。我最好的猜测是，Navbar-NAV类具有与navbar-default样式相关的一些CSS。

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
<div id="navigation">
   <nav class="navbar navbar-default">
      <ul class="nav">
         <li class="nav-item"><a class="nav-link" href="/">Home</a></li>
         <li class="nav-item"><a class="nav-link" href="/browse">Browse</a></li>
         <li class="nav-item"><a class="nav-link" href="/create">Create</a></li>
         <li class="nav-item"><a class="nav-link" href="/review">Review</a></li>
         <li class="nav-item"><a class="nav-link" href="/help">Help</a></li>
      </ul>
      <form class="form-inline">
         <a href="#" onclick="signOut();">Sign out</a>
         <div id="my-signin2">
            <!-- google oauth stuff -->
         </div>
      </form>
   </nav>
</div>

Answer 2

您没有包含jQuery <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>，并确保将navbar ul包裹在容器 - 流体中，如所示。这样，当调整大小时，它将响应迅速，并垂直对齐小型视口：

<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/3.2.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div id="navigation">
   <nav class="navbar navbar-default">
   <div class="container-fluid">
      <ul class="nav navbar-nav">
         <li class="nav-item"><a class="nav-link" href="/">Home</a></li>
         <li class="nav-item"><a class="nav-link" href="/browse">Browse</a></li>
         <li class="nav-item"><a class="nav-link" href="/create">Create</a></li>
         <li class="nav-item"><a class="nav-link" href="/review">Review</a></li>
         <li class="nav-item"><a class="nav-link" href="/help">Help</a></li>
      </ul>
      <form class="form-inline">
         <a href="#" onclick="signOut();">Sign out</a>
         <div id="my-signin2">
            <!-- google oauth stuff -->
         </div>
      </form>
      </div>
   </nav>
</div>

Answer 3

您可以删除背景。

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
<div id="menu-outer">
<div id="table">
   <nav class="navbar navbar-default horizontal-list">
      <ul class="nav navbar-nav">
         <li class="nav-item"><a class="nav-link" href="/">Home</a></li>
         <li class="nav-item"><a class="nav-link" href="/browse">Browse</a></li>
         <li class="nav-item"><a class="nav-link" href="/create">Create</a></li>
         <li class="nav-item"><a class="nav-link" href="/review">Review</a></li>
         <li class="nav-item"><a class="nav-link" href="/help">Help</a></li>
      </ul>
      <form class="form-inline">
         <a href="#" onclick="signOut();">Sign out</a>
         <div id="my-signin2">
            <!-- google oauth stuff -->
         </div>
      </form>
   </nav>
</div>
</div>
<style>
    #menu-outer {
    height: 84px;
    background: url(images/bar-bg.jpg) repeat-x;
}
.table {
    display: table;   /* Allow the centering to work */
    margin: 0 auto;
}
ul#horizontal-list {
    min-width: 696px;
    list-style: none;
    padding-top: 20px;
    }
    ul#horizontal-list li {
        display: inline;
    }
</style>

Answer 4

从我看到的问题中，列表是列表，ul和li将列出垂直列表。如果需要水平，则需要一些CSS或一些样式。

尝试添加类似的内容：

<html>
<head>
<style>
ul li {
    display:inline;
}
</style>
</head>
<body>
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-    beta.2/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-    beta.2/js/bootstrap.min.js"></script>
<div id="navigation">
   <nav class="navbar navbar-default">
  <ul class="nav navbar-nav">
     <li class="nav-item"><a class="nav-link" href="/">Home</a></li>
     <li class="nav-item"><a class="nav-link" href="/browse">Browse</a></li>
     <li class="nav-item"><a class="nav-link" href="/create">Create</a></li>
     <li class="nav-item"><a class="nav-link" href="/review">Review</a></li>
     <li class="nav-item"><a class="nav-link" href="/help">Help</a></li>
  </ul>
  <form class="form-inline">
     <a href="#" onclick="signOut();">Sign out</a>
     <div id="my-signin2">
        <!-- google oauth stuff -->
     </div>
  </form>
  </nav>
  </div>
  </body>
</html>