如何更改打开的引导程序下拉选项的背景颜色。这是代码:
<nav class="navbar navbar-toggleable-sm navbar-inverse bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar6">
<span class="navbar-toggler-icon"></span>
</button>
<a href="#" class="navbar-brand">Title </a>
<div class="navbar-collapse collapse justify-content-stretch" id="navbar6">
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="#">About<span class="sr-only">Home</span></a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Services
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<a class="dropdown-item" href="#">Design</a>
<a class="dropdown-item" href="#">Development</a>
<a class="dropdown-item" href="#">Consulting</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact</a>
</li>
</ul>
</div>
</nav>
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在引导程序 3 中,我在以下帮助下对其进行了更改:
.navbar-default .navbar-nav > .open > a,
.navbar-default …Run Code Online (Sandbox Code Playgroud)