Bootstrap Navbar列表项/链接未显示 [英] Bootstrap Navbar list items/links not showing
问题描述
我正在学习使用Bootstrap并使用组件，特别是导航栏.
I am learning to use Bootstrap and playing with components, specifically the navbar.
我的链接/列表项未显示.我已经直接从Bootstrap复制了代码. 我希望有人可以解释一下我所缺少的内容.
My links/list items aren't showing. I have copied code directly from Bootstrap. I'm hoping someone could please explain what I'm missing.
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<title>NavBar</title>
<!-- bootstrap css -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/css/bootstrap.min.css" integrity="sha384-y3tfxAZXuh4HwSYylfB+J125MxIs6mR5FOHamPBG064zB+AFeWH94NdvaCBm8qnd" crossorigin="anonymous">
</head>
<body>
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
<div class="navbar-nav">
<a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#">Features</a>
<a class="nav-item nav-link" href="#">Pricing</a>
<a class="nav-item nav-link disabled" href="#">Disabled</a>
</div>
</div>
</nav>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/js/bootstrap.min.js" integrity="sha384-vZ2WRJMwsjRMW/8U7i6PWi6AlO1L79snBrmgiDpgIWJ82z8eA5lenwvxbMV1PAh7" crossorigin="anonymous">
</script>
</body>
推荐答案
在 Bootstrap 4 中，需要navbar-expand-*类来显示水平导航栏，否则它将折叠成移动状态.
In Bootstrap 4, the navbar-expand-* class is needed to show the horizontal navbar, otherwise it will collapse into it's mobile state.
确保您已在Codepen中正确引用为 https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css
Make sure you've referenced it properly in the Codepen as https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css
Or ，使用Codeply，它将包括所有与您相关的库: Codeply上的Bootstrap 4
Or, use Codeply, and it will include the all the relevant libraries for you: Bootstrap 4 on Codeply
以下是带有 Bootstrap 4.0.0 的导航栏: http://www.codeply.com/go/SmEyy7rg5S
Here's the Navbar with Bootstrap 4.0.0: http://www.codeply.com/go/SmEyy7rg5S
<nav class="navbar navbar-expand-md navbar-light bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
<div class="navbar-nav">
<a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
<a class="nav-item nav-link" href="#">Features</a>
<a class="nav-item nav-link" href="#">Pricing</a>
<a class="nav-item nav-link disabled" href="#">Disabled</a>
</div>
</div>
</nav>
这篇关于Bootstrap Navbar列表项/链接未显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
