我想从这里在布局中使用Bootstrap navbar mega菜单下拉列表：
https://bootstrap-menu.com/detail-megamenu.html
我下载了代码并将其放到布局中，但是当我单击它时，大型菜单既没有展开，也没有任何反应。在Chrome检查区域中，Aria扩展始终为aria扩展=“ false”。我想念什么？
_Layout.cshtml
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>@ViewData["Title"] - ECommerce.Web</title>
<link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
<link rel="stylesheet" href="~/css/site.css" />
<!-- jQuery -->
<script src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
crossorigin="anonymous"></script>
<!-- Bootstrap files (jQuery first, then Popper.js, then Bootstrap JS) -->
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.bundle.min.js" type="text/javascript"></script>
<style type="text/css">
@@media all and (min-width: 992px) {
.navbar {
padding-top: 0;
padding-bottom: 0;
}
.navbar .has-megamenu {
position: static !important;
}
.navbar .megamenu {
left: 0;
right: 0;
width: 100%;
padding: 20px;
}
.navbar .nav-link {
padding-top: 1rem;
padding-bottom: 1rem;
}
}
</style>
</head>
<body class="bg-light">
<header>
<nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
<div class="container">
<a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">ECommerce.Web</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".navbar-collapse" aria-controls="navbarSupportedContent"
aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="navbar-collapse collapse d-sm-inline-flex flex-sm-row-reverse">
<ul class="navbar-nav flex-grow-1">
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
</li>
</ul>
</div>
</div>
</nav>
</header>
<!-- ========================= SECTION CONTENT ========================= -->
<div class="container">
<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
<a class="navbar-brand" href="#">Brand</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#main_nav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="main_nav">
<ul class="navbar-nav">
<li class="nav-item active"> <a class="nav-link" href="#">Home </a> </li>
<li class="nav-item"><a class="nav-link" href="#"> About </a></li>
<li class="nav-item"><a class="nav-link" href="#"> Services </a></li>
<li class="nav-item dropdown has-megamenu">
<a class="nav-link dropdown-toggle" href="#" data-toggle="dropdown"> Mega menu </a>
<div class="dropdown-menu megamenu" role="menu">
<div class="row">
<div class="col-md-3">
<div class="col-megamenu">
<h6 class="title">Title Menu One</h6>
<ul class="list-unstyled">
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
</ul>
</div> <!-- col-megamenu.// -->
</div><!-- end col-3 -->
<div class="col-md-3">
<div class="col-megamenu">
<h6 class="title">Title Menu Two</h6>
<ul class="list-unstyled">
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
</ul>
</div> <!-- col-megamenu.// -->
</div><!-- end col-3 -->
<div class="col-md-3">
<div class="col-megamenu">
<h6 class="title">Title Menu Three</h6>
<ul class="list-unstyled">
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
</ul>
</div> <!-- col-megamenu.// -->
</div>
<div class="col-md-3">
<div class="col-megamenu">
<h6 class="title">Title Menu Four</h6>
<ul class="list-unstyled">
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
<li><a href="#">Custom Menu</a></li>
</ul>
</div> <!-- col-megamenu.// -->
</div><!-- end col-3 -->
</div><!-- end row -->
</div> <!-- dropdown-mega-menu.// -->
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item"><a class="nav-link" href="#"> Menu item </a></li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" data-toggle="dropdown"> Dropdown </a>
<ul class="dropdown-menu dropdown-menu-right">
<li><a class="dropdown-item" href="#"> Submenu item 1</a></li>
<li><a class="dropdown-item" href="#"> Submenu item 2 </a></li>
</ul>
</li>
</ul>
</div> <!-- navbar-collapse.// -->
</nav>
</div><!-- container // -->
<div class="container">
<main role="main" class="pb-3">
@RenderBody()
</main>
</div>
<footer class="border-top footer text-muted">
<div class="container">
© 2020 - ECommerce.Web - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
</div>
</footer>
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
<script src="~/js/site.js" asp-append-version="true"></script>
@RenderSection("Scripts", required: false)
</body>
</html>
<script type="text/javascript">
/// some script
// jquery ready start
$(document).ready(function () {
// jQuery code
//////////////////////// Prevent closing from click inside dropdown
$(document).on('click', '.dropdown-menu', function (e) {
e.stopPropagation();
});
}); // jquery end
</script>
您可以尝试在中删除以下代码<head></head>：
<!-- jQuery -->
<script src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
crossorigin="anonymous"></script>
<!-- Bootstrap files (jQuery first, then Popper.js, then Bootstrap JS) -->
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.bundle.min.js" type="text/javascript"></script>
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我来说两句