javascript - 使用 css 更改所选菜单项的颜色

Question

我想使用 css 样式突出显示当前打开的页面。这是我的 html 代码

<ul class="nav" id="nav">
  <li id="home">
    <a href="home.html" data-id="home" target="ifrm">Home</a>
    <ul>
     <li><a href="item1.html" target="ifrm">item1</a></li>
     <li><a href="item2.html" target="ifrm">item2</a></li>
     <li><a href="item3.html" target="ifrm">item3</a></li>
    </ul>
  </li>
  <li id="skill"><a href="skill.html" data-id="skill" target="ifrm">Skill</a></li>
  <li id="research"><a href="research.html" data-id="research"    target="ifrm">Research</a></li>
  <li id="link"><a href="link.html" data-id="link" target="ifrm">Link</a></li>
</ul>
<iframe name="ifrm"></iframe>

应该只是更改菜单列表的字体和背景颜色，女巫页面正在 iframe 中加载。

Answer 1

$(function(){
   $('li a').click(function(){
     $('li a').each(function(a){
       $( this ).removeClass('selectedclass')
     });
     $( this ).addClass('selectedclass');
   });
  
  $('ul a').click(function(){
     $('ul a').each(function(a){
      $( this ).removeClass('selectedclass')
     });
     $( this ).addClass('selectedclass');
   });
});

li a.selectedclass
{
  color:red;
  background-color:blue;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="nav" id="nav">
          <li id="home"><a href="home.html" data-id="home" target="ifrm">Home</a>
		  <ul>
						<li ><a href="item1.html" target="ifrm">item1</a></li>
						<li ><a	href="item2.html" target="ifrm">item2</a></li>
						<li ><a href="item3.html" target="ifrm">item3</a></li>

		  </ul>
		  
		  </li>
          <li id="skill"><a href="skill.html" data-id="skill" target="ifrm">Skill</a></li>
          <li id="research"><a href="research.html" data-id="research"    target="ifrm">Research</a></li>
          <li id="link"><a href="link.html" data-id="link" target="ifrm">Link</a></li>
        </ul>

<iframe name="ifrm"></iframe>

您需要先定义一个具有所需样式的类，然后单击 anchor 标记从所有类中删除该类，然后将其添加到单击的 anchor 标记中。