单击时，我正在尝试更改引导导航选项卡的字体颜色。我可以使用css将未选择的导航选项卡的字体颜色更改为绿色；李>a、 但是css块导航选项卡>li.active>a似乎无法更改所选选项卡的颜色。请提供帮助。
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<style>
.nav-tabs>li>a{
color:green;
}
.nav-tabs>li.active>a{
color:green;
}
</style>
</head>
<body>
<ul class="nav nav-tabs">
<li class="nav-item">
<a class="nav-link active"
href="#id1"
data-toggle="tab">one</a>
</li>
<li class="nav-item">
<a href="#id2"
class="nav-link"
data-toggle="tab">two</a>
</li>
</ul>
</body>
您的选择器不正确。.active类位于锚标记中。您已在li中给出
更改
.nav-tabs>li.active>a{
color:green;
}
至
.nav-tabs > li > a.active {
color:green;
}
要为活动状态着色，必须覆盖引导程序样式，如下所示：.nav-tabs a.nav-link.active
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<style>
.nav-tabs>li>a{
color:green;
}
.nav-tabs a.nav-link.active {
color: red;
}
</style>
<body>
<ul class="nav nav-tabs">
<li class="nav-item">
<a class="nav-link active"
href="#id1"
data-toggle="tab">one</a>
</li>
<li class="nav-item">
<a href="#id2"
class="nav-link"
data-toggle="tab">two</a>
</li>
</ul>而不是
.nav-tabs>li.active>a{
color:green;
}
您可以使用以下代码更改所选选项卡的颜色
.nav-tabs .nav-link.active{
color:red; /*color you want*/
}