[英]How can I change dropdown menu active background color with Bootstrap 4?
[英]How can I change bootstrap 3 dropdown background color after click?
問題是當我單擊下拉文本 go 黑色時,我需要將其更改為白色。 當我刪除#tab 顏色時,我將更改為#9e9e9d。
#tab{ 顏色:黑色 }
#tab:hover {
color: white;
}
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="index.html" id="tab">HOME</a></li>
<li><a href="Beverages.html" id="tab">MENU</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#" id="tab">PROMOTION <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Gift Cards</a></li>
<li><a href="#">Christmas Bundle</a></li>
</ul>
</li>
<li><a href="About.html" id="tab">ABOUT</a></li>
<li><a href="Faq.html" id="tab">FAQ</a></li>
</ul>
</div>
我在jquery
上給出了一個解決方案,因為你提到了bootstrap
。 該解決方案使用方法toggleClass()
。
有必要嗎?
$('.dropdown').on('click', function() { $(this).toggleClass('a_color_active'); $('.dropdown-menu').toggleClass('ul_color_active'); });
.dropdown { background-color: pink; }.dropdown-menu { display: none; }.dropdown a, .dropdown-menu a { color: unset; }.dropdown.a_color_active { background-color: black; color: white; }.dropdown-menu.ul_color_active { display: block; background-color: black; color: white; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" href="#" id="tab">PROMOTION <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="#">Gift Cards</a></li> <li><a href="#">Christmas Bundle</a></li> </ul> </li>
第二:
$('.dropdown').on('click', function() { $(this).toggleClass('a_color_active'); $('.dropdown-menu').toggleClass('ul_color_active'); });
.nav.navbar-nav a { color: black; }.nav.navbar-nav a:hover { color: white; }.dropdown-menu { display: none; }.nav.navbar-nav a, .dropdown-menu a { color: unset; }.dropdown.a_color_active { background-color: black; color: white; }.dropdown-menu.ul_color_active { display: block; background-color: black; color: white; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div class="collapse navbar-collapse" id="myNavbar"> <ul class="nav navbar-nav"> <li><a href="index.html" id="tab">HOME</a></li> <li><a href="Beverages.html" id="tab">MENU</a></li> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" href="#" id="tab">PROMOTION <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="#">Gift Cards</a></li> <li><a href="#">Christmas Bundle</a></li> </ul> </li> <li><a href="About.html" id="tab">ABOUT</a></li> <li><a href="Faq.html" id="tab">FAQ</a></li> </ul> </div>
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