Bootstrap4 导航栏切换无法正常工作
[英]Bootstrap4 navbar toggle not working correctly
问题描述
我在切换导航栏按钮时遇到了一些问题。 它没有正确切换。 当我按下按钮时，切换背景显示和立即消失。 这是我的代码和小提琴文件：
https://jsfiddle.net/85uyhbv6/
<!-- Navigation -->
<nav class="navbar navbar-expand-lg navbar-dark sticky-top bg-custom">
<div class="container-fluid">
<a class="navbar-brand" href="#">Brand</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 text-center" id="navbarSupportedContent">
<ul class="navbar-nav navbar-center">
<li class="nav-item active">
<a class="nav-link" href="#top-img">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#games-tag">Games</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#team-tag">Team</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">About Us</a>
</li>
</ul>
</div>
</div>
</nav>
.bg-gray{
background-color: #b8b8b8;
}
.bg-custom{
background-color: #170c37;
}
.navbar-brand{
font-family: roboto-thin;
font-weight: bold;
font-size: 28px;
}
.navbar-dark .navbar-nav .nav-link{
font-family: roboto-thin;
font-weight: 700;
font-size: 16px;
}
.navbar-dark .navbar-nav .nav-item{
margin: 0 15px;
}
.navbar-center{
position: absolute;
left: 50%;
transform: translatex(-50%)
}
我认为 position absolute 是导致问题的原因，但没有它我无法正确地将项目居中。 感谢您的帮助。
2 个解决方案
解决方案1
1 2020-08-21 11:28:18
删除position: absolute; 在.navbar-center class 中插入position: relative;
.bg-gray{ background-color: #b8b8b8; }.bg-custom{ background-color: #170c37; }.navbar-brand{ font-family: roboto-thin; font-weight: bold; font-size: 28px; }.navbar-dark.navbar-nav.nav-link{ font-family: roboto-thin; font-weight: 700; font-size: 16px; }.navbar-dark.navbar-nav.nav-item{ margin: 0 15px; }.navbar-center{ /*position: absolute;*/ position: relative; left: 50%; transform: translatex(-50%) }
<head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <link href="../static/css/style.css" rel="stylesheet"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> </head> <body> <!-- Navigation --> <nav class="navbar navbar-expand-lg navbar-dark sticky-top bg-custom"> <div class="container-fluid"> <a class="navbar-brand" href="#">Brand</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 text-center" id="navbarSupportedContent"> <ul class="navbar-nav navbar-center"> <li class="nav-item active"> <a class="nav-link" href="#top-img">Home <span class="sr-only">(current)</span></a> </li> <li class="nav-item"> <a class="nav-link" href="#games-tag">Games</a> </li> <li class="nav-item"> <a class="nav-link" href="#team-tag">Team</a> </li> <li class="nav-item"> <a class="nav-link" href="#">About Us</a> </li> </ul> </div> </div> </nav> </body>
解决方案2
1 已采纳 2020-08-21 11:30:32
如果您从.navbar-center中删除 css，那么它将按预期工作，并且不会对菜单项的 alignment 产生任何影响，默认情况下它们居中对齐。
要么
只需添加min-height: 160px; 在 class .collapse.show上，它将起作用。
这是工作示例：
.collapse.show { min-height: 160px; }.bg-gray{ background-color: #b8b8b8; }.bg-custom{ background-color: #170c37; }.navbar-brand{ font-family: roboto-thin; font-weight: bold; font-size: 28px; }.navbar-dark.navbar-nav.nav-link{ font-family: roboto-thin; font-weight: 700; font-size: 16px; }.navbar-dark.navbar-nav.nav-item{ margin: 0 15px; }.navbar-center{ position: absolute; left: 50%; transform: translatex(-50%) }
<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> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous"> <!-- Navigation --> <nav class="navbar navbar-expand-lg navbar-dark sticky-top bg-custom"> <div class="container-fluid"> <a class="navbar-brand" href="#">Brand</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 text-center" id="navbarSupportedContent"> <ul class="navbar-nav navbar-center"> <li class="nav-item active"> <a class="nav-link" href="#top-img">Home <span class="sr-only">(current)</span></a> </li> <li class="nav-item"> <a class="nav-link" href="#games-tag">Games</a> </li> <li class="nav-item"> <a class="nav-link" href="#team-tag">Team</a> </li> <li class="nav-item"> <a class="nav-link" href="#">About Us</a> </li> </ul> </div> </div> </nav>
Bootstrap导航栏切换按钮无法正常工作（内置HTML）
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