[英]how to make overlay navigation bar in bootstrap
我只是在学习前端。 当它到达超小页面时,我无法制作覆盖导航栏而不是下拉菜单。 所以这就是我所做的:
function openNav() { document.getElementById("navbarSupportedContent").style.height = "100%"; } function closeNav() { document.getElementById("navbarSupportedContent").style.height = "0%"; }
#navbarSupportedContent { height: 0; width: 100%; position: fixed; z-index: 1; top: 0; left: 0; background-color: rgb(0,0,0); background-color: rgba(0,0,0, 0.9); overflow-x: hidden; transition: 0.5s; } #overlay-content { position: relative; top: 25%; width: 100%; text-align: center; margin-top: 30px; } #navbarSupportedContent a { padding: 8px; text-decoration: none; font-size: 36px; color: #818181; display: block; transition: 0.3s; }
<html lang="en"> <head> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous"> </head> <body> <nav class="navbar navbar-expand-lg navbar-light bg-white"> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation" onclick="openNav()"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarSupportedContent"> <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a> <ul class="navbar-nav ml-auto" id="overlay-content"> <li class="nav-item pr-5"> <a class="nav-link" href="#">About</a> </li> <li class="nav-item pr-5"> <a class="nav-link" href="#">Products</a> </li> <li class="nav-item pr-5"> <a class="nav-link" href="#">Contacts</a> </li> </ul> </div> </nav> <script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script> </body> </html>
当我尝试按下按钮时,它变得特别小,覆盖下降但它没有达到百分之一百的页面,它突然又上升了。 有人可以帮助我吗?
提前致谢 !
发生这种情况是因为您将 Bootstrap 核心功能和您的习惯混为一谈。
只需删除 Bootstrap 的Collapse类,因为您已经编写了 javascript 代码来实现您所需要的。
添加CSS这一行:
@media (min-width: 992px) {
.navbar-expand-lg .navbar-toggler {
display: block;
}
}
由于 Bootstrap 4 媒体查询将隐藏与 class 匹配的元素,用于大于 992 像素的屏幕。
然后从 HTML 中删除所有与崩溃相关的 class:
<nav class="navbar navbar-expand-lg navbar-light bg-white">
<button class="navbar-toggler" type="button" onclick="openNav()">
<span class="navbar-toggler-icon"></span>
</button>
<div class="" id="navbarSupportedContent">
<a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
<ul class="navbar-nav ml-auto" id="overlay-content">
<li class="nav-item pr-5">
<a class="nav-link" href="#">About</a>
</li>
<li class="nav-item pr-5">
<a class="nav-link" href="#">Products</a>
</li>
<li class="nav-item pr-5">
<a class="nav-link" href="#">Contacts</a>
</li>
</ul>
</div>
</nav>
这是一支带电工作的笔: https://codepen.io/alezuc/pen/dyYGobJ
希望这可以帮助!
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.