<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://cdn.jsdelivr.net/npm/jquery@3.4.1/dist/jquery.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
<script>
// Bootstrap4鼠标悬浮显示二级菜单,鼠标移除隐藏二级菜单,
$(document).ready(function(){
var $dropdownLi = $('li.dropdown');
$dropdownLi.mouseover(function() {
$(this).children(".dropdown-menu").addClass('show');
}).mouseout(function() {
$(this).children(".dropdown-menu").removeClass('show');
});
});
</script>
<style>
@media (min-width: 992px){
.navbar-container{
width: 1024px;
display: flex;
margin: auto;
}
.navbar-expand-lg .navbar-nav .dropdown-menu {
margin-top: -2px;
}
}
</style>
<title>Bootstrap4鼠标悬浮显示二级菜单,鼠标移除隐藏二级菜单</title>
</head>
<body>
<nav class="navbar navbar-expand-lg fixed-top navbar-dark bg-dark ">
<div class="navbar-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">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item dropdown active">
<a class="nav-link dropdown-toggle nav1" href="#" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Link
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item active " href="#">LinkAction</a>
<a class="dropdown-item" href="#">LinkAnother action</a>
<!-- <div class="dropdown-divider"></div> -->
<a class="dropdown-item" href="#">LinkSomething else here</a>
</div>
</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" href="#" tabindex="-1" aria-disabled="false">Disabled</a>
</li>
</ul>
<div class="form-inline my-2 my-lg-0">
<button type="button" class="btn" style="color:#FFF" >登陆</button>
<button type="button" class="btn" style="color:#FFF">注册</button>
</div>
</div>
</div>
</nav>
</body>
</html>
最后修改于 2020-04-30 14:24:44
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