我试图让顶部菜单导航栏在他们打开主页时透明，并且当他们开始向下滚动时，将有它的背景色。
这是我的代码:
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<body data-spy="scroll" data-target="#my-navbar">
<!-- Navbar -->
<nav class="navbar navbar-custom navbar-fixed-top top-nav-collapse" id="my-navbar" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a href="" class="navbar-brand">Health&Wellness</a>
</div>
<!-- Navbar Header-->
<div class="collapse navbar-collapse" id="navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="#health_product">Health Product</a>
</li>
<li><a href="#blog">Blog</a>
</li>
<li><a href="#slim_product">Slim Product</a>
</li>
<li><a href="#video">Video</a>
</li>
<li><a href="#skin_product">Skin Product</a>
</li>
<li><a href="#contact_us">Contact us</a>
</li>
</ul>
</div>
</div>
<!-- End Container-->
</nav>
<!-- End navbar-->
</body>最佳答案
你需要 JS 来做到这一点
$(window).scroll(function() {
if ($(".navbar").offset().top > 50) {
$(".navbar-fixed-top").addClass("top-nav-collapse");
} else {
$(".navbar-fixed-top").removeClass("top-nav-collapse");
}
});.navbar-custom.top-nav-collapse {
background: black;
padding: 0;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
<body data-spy="scroll" data-target="#my-navbar">
<!-- Navbar -->
<nav class="navbar navbar-custom navbar-fixed-top" id="my-navbar" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a href="" class="navbar-brand">Health&Wellness</a>
</div>
<!-- Navbar Header-->
<div class="collapse navbar-collapse" id="navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="#health_product">Health Product</a>
</li>
<li><a href="#blog">Blog</a>
</li>
<li><a href="#slim_product">Slim Product</a>
</li>
<li><a href="#video">Video</a>
</li>
<li><a href="#skin_product">Skin Product</a>
</li>
<li><a href="#contact_us">Contact us</a>
</li>
</ul>
</div>
</div>
<!-- End Container-->
</nav>
<!-- End navbar-->
<div>
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Fusce sit amet metus gravida, mollis metus quis, consectetur erat. Aliquam rhoncus semper hendrerit. Vivamus vitae lectus diam. Suspendisse sit amet lacinia arcu. Donec tempus semper dolor eget lacinia. Cras eleifend aliquam accumsan. Duis nec nisi pellentesque, iaculis tortor eu, laoreet velit. Nam non diam semper, iaculis risus lobortis, tristique leo. Sed et elit non mi sollicitudin suscipit ut in tortor. </div>
</body>关于html - Bootstrap 3 菜单导航栏在向下滚动时改变颜色，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38273273/