Question

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，而是将它们堆叠在一起。不要介意我如何形容这一点。

我希望他们以这种方式放置： I want them to be placed in this manner.

但是他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，请提出任何想法？

这是代码的某些部分

<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>

Answer 1

在div部分下面的代码中：

<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。

要使整个工作正常，您可以使用fixed-top类将所有内容移动到div中，然后添加noscript行，然后添加导航条代码。

然后，您还需要将style="margin-top: 120px;"之类的内容添加到主容器中，该容器将跟随fixed-top div以推送主要内容。

点击下面的“运行代码段”按钮，然后展开到整页：

<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>

将固定顶部元素放在另一个引导程序4

1 个答案: