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부트 스트랩 3을 사용하여 Navbar를 만들었습니다. 선택할 때 음영 처리하는 방법이 궁금합니다. 다 그렇지 않으면 잘 작동합니다. JavaScript가 필요하다고 생각하지만 구현 방법을 모르겠습니다.선택한 부트 스트랩에 음영을 추가하는 중 3 Navbar
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<div style="font-family:Webdings;">
<%= link_to "lalala", root_path, class: 'navbar-brand' %>
</div>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse navbar-ex1-collapse">
<ul class="nav navbar-nav">
<li><%= link_to "laaa", lal_path %></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">lala<b class="caret"></b></a>
<ul class="dropdown-menu">
<li><%= link_to "lala", laa_path %></li>
<li><%= link_to "lalala", lala_path %></li>
<li><%= link_to "lalala", lala_path %></li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li>
<a href="https:lalala" class="twitter-follow-button" data-show-count="false" data-show-screen-name="false">Follow @lalala</a>
</li>
<li>
<div class="fb-like" data-href="lalala" data-width="600" data-layout="button_count" data-show-faces="true" data-send="false"></div>
</li>
<li><%= link_to "lala", contact_path %></li>
<li><%= link_to "lalalala", register_path %></li>
</ul>
</div><!-- /.navbar-collapse -->
</nav>