将固定顶部元素放在另一个引导程序4之上 [英] place fixed-top elements above one another bootstrap 4
问题描述
我试图让用户了解如何启用javascript以更好地使用网站，我希望使用bootstrap将消息放在导航栏上方，而是将它们相互堆叠。不介意我如何形容这一点。
I'm trying to let users get informed to enable javascript for better use of the website to I want the message placed above the navigation bar using bootstrap, but instead, they stack upon one another. Don't mind how I describe this.
我希望它们以这种方式放置：
I want them to be placed in this manner:
但它们以这种方式叠加在一起：
But they stack on top of each other this way:
使用Bootstrap 4，请提出任何意见吗？
Using Bootstrap 4, please any ideas?
以下是代码的部分内容
<html>
...
<body>
<noscript class='bg-danger text-light py-2 text-center d-block fixed-top mb-4' style='z-index: 9999;'>Enable javascript to use App better.</noscript>
<header class='navbar fixed-top navbar-expand-lg navbar-light bg-light'>
<div class='container'>
...
</div>
</header>
...
</body>
</html>
推荐答案
在下面的代码中 div 部分：
<div class='bg-danger text-light py-2 text-center mb-0'>Enable javascript to enhance this App.</div>
需要替换为 noscript 。 div只是为了方便测试/可见性。
would need to be replaced with noscript. The div is just for easy testing/visibility.
为了使整个过程正常运行，你可以将所有内容移动到一个带有 fixed-top <的div中/ code> class然后添加你的 noscript 行，然后是navbar代码。
To make the whole thing work, you move everything into a div with the fixed-top class and then add your noscript line followed by the navbar code.
然后你还需要添加类似 style =margin-top：120px;的内容主容器将跟随 fixed-top div来推送主要内容。
Then you'll also need to add something like style="margin-top: 120px;" to the main container that would follow the fixed-top div to push the main content down.
点击运行代码摘要按钮下方并展开到整页：
Click the "run code snippet" button below and expand to full page:
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<div class="fixed-top">
<div class='bg-danger text-light py-2 text-center mb-0'>Enable javascript to enhance this App.</div>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</div>
</nav>
</div>
<p style="margin-top: 120px;">first line of text</p>
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