使用CSS更改所選菜單項的顏色

Question

我想使用css樣式突出顯示當前正在打開的頁面。這是我的html代碼

<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>

只能更改菜單​​列表的字體和背景顏色，巫婆頁面正在iframe中加載。

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> 

您需要首先定義一個具有所需樣式的類，然后單擊錨標記，將其從所有類中刪除，然后將其添加到單擊的錨標記中。

Answer 2

將此代碼添加到文件中

<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script type="text/javascript">
    $("a").click(function(){
        $("a").css("color","BLUE"); // change this color to default one
        $( this ).css( "color", "RED" ); 
    });
</script>