bootstrap3：使导航栏链接带有下划线

Question

我正在Bootstrap 3网站上工作，我想在边框的帮助下使导航栏中的链接变得暗淡，如下所示：

但目前看来是这样的：

我尝试了“底部填充”属性，但这无济于事。
我的html：

    <nav class="navbar navbar-default navbar-fixed-top">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand navbar-left" href="/index.html"><img class="nav-logo" src="/images/xcellent-logo/logo.png"></a>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <ul class="nav navbar-nav nav-underline">
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Services<span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="stuff">stuff</a></li>
            <li><a  href="stuff">stuff</a></li>
            <li><a href="stuff">stuff</a></li>
            <li><a  href="stuff">stuff</a></li>
            <li><a  href="stuff">stuff</a></li>
          </ul>
        </li>
        <li><a  href="stuff">stuff</a></span></li>
        <li><a  href="stuff">stuff</a></span></li>
        <li><a  href="stuff">stuff</a></span></li>             
      </ul>
    </div><!--/.nav-collapse -->
  </div>
</nav>  

我尝试过的CSS：

.nav-underline a {
border-bottom: transparent solid 2px;
padding-bottom: 40px;
}
.nav-underline a:hover {
border-bottom: $white solid 2px;
}

有没有办法做到这一点？ 谢谢你的帮助！

Answer 1

只需将锚的填充移到li即可。 这是相同的自定义CSS。

.navbar-nav.nav-underline>li>a {
  padding: 0px;
}

.navbar-nav.nav-underline>li {
  padding: 15px;
}

下面是工作示例：

 .nav-underline a { border-bottom: transparent solid 2px; padding-bottom: 40px; } .nav-underline a:hover { border-bottom: red solid 2px; } .navbar-nav.nav-underline>li>a { padding: 0px; } .navbar-nav.nav-underline>li { padding: 15px; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" /> <nav class="navbar navbar-default navbar-fixed-top"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand navbar-left" href="/index.html"><img class="nav-logo" src="/images/xcellent-logo/logo.png"></a> </div> <div id="navbar" class="navbar-collapse collapse"> <ul class="nav navbar-nav nav-underline"> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Services<span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="stuff">stuff</a></li> <li><a href="stuff">stuff</a></li> <li><a href="stuff">stuff</a></li> <li><a href="stuff">stuff</a></li> <li><a href="stuff">stuff</a></li> </ul> </li> <li><a href="stuff">stuff</a></span> </li> <li><a href="stuff">stuff</a></span> </li> <li><a href="stuff">stuff</a></span> </li> </ul> </div> <!--/.nav-collapse --> </div> </nav>