如何在引导程序中更改活动选项卡的颜色

Question

我想创建一个带有选项卡的搜索框，但问题是当我按下选项卡时，活动选项卡没有显示文本，因为我将颜色设置为白色。我想要那个；当我按下选项卡时，活动选项卡显示蓝色文本，所有其他选项卡显示蓝色背景的白色文本。我用了引导程序。

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>
<ul class="nav nav-tabs" style="margin-left: 20px;" id="myTab" role="tablist" >
<li class="nav-item" style="background-color:#0080FF; ">
<a class="nav-link active " id="home-tab" data-toggle="tab" href="#home" role="tab" aria-controls="home" aria-selected="true" style="color: white; ">Home</a>
</li>
<li class="nav-item" style="background-color:#0080FF; ">
<a class="nav-link" id="profile-tab" data-toggle="tab" href="#profile" role="tab" aria-controls="profile" aria-selected="false" style="color:white ;">Profile</a>
</li>
<li class="nav-item" style="background-color:#0080FF; ">
<a class="nav-link" id="contact-tab" data-toggle="tab" href="#contact" role="tab" aria-controls="contact" aria-selected="false" style="color:white ;">Contact</a>
</li>
</ul>
<div class="tab-content" id="myTabContent" >
<div class="tab-pane fade show active" id="home" role="tabpanel" aria-labelledby="home-tab" >...</div>
<div class="tab-pane fade" id="profile" role="tabpanel" aria-labelledby="profile-tab">...</div>
<div class="tab-pane fade" id="contact" role="tabpanel" aria-labelledby="contact-tab">...</div>
</div>

这是我的代码：

Answer 1

你不应该使用内联css，因为这不是最后的手段。我重构你的代码&编辑css如下。

这只是特异性值的问题。你可以参考这个https://css-tricks.com/specifics-on-css-specificity/

.nav-tabs .nav-item .nav-link {
background-color: #0080FF;
color: #FFF;
}
.nav-tabs .nav-item .nav-link.active {
color: #0080FF;
}
.tab-content {
border: 1px solid #dee2e6;
border-top: transparent;
padding: 15px;
}
.tab-content .tab-pane {
background-color: #FFF;
color: #0080FF;
min-height: 200px;
height: auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" />
<div class="col-md-11">
<ul class="nav nav-tabs" id="myTab" role="tablist">
<li class="nav-item">
<a class="nav-link active " id="home-tab" data-toggle="tab" href="#home" role="tab" aria-controls="home" aria-selected="true">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" id="profile-tab" data-toggle="tab" href="#profile" role="tab" aria-controls="profile" aria-selected="false">Profile</a>
</li>
<li class="nav-item">
<a class="nav-link" id="contact-tab" data-toggle="tab" href="#contact" role="tab" aria-controls="contact" aria-selected="false">Contact</a>
</li>
</ul>
<div class="tab-content" id="myTabContent">
<div class="tab-pane fade show active" id="home" role="tabpanel" aria-labelledby="home-tab">The standard Lorem Ipsum passage, used since the 1500s "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris
nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est
laborum." Section 1.10.32 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC "Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis
et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem
ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam,
nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"</div>
<div class="tab-pane fade" id="profile" role="tabpanel" aria-labelledby="profile-tab">...</div>
<div class="tab-pane fade" id="contact" role="tabpanel" aria-labelledby="contact-tab">...</div>
</div>
</div>

Answer 2

您可以随时通过css修改导航列表。使用这个css代码，这样就可以使用a标记来更改颜色及其背景色。使用li标记仅设置背景，使用a标记设置文本的颜色是不合适的。您总是可以将bg颜色和文本的颜色组合成一个标签。此外，在html中使用内联css也是不可取的。

CSS代码

ul.nav-tabs li.nav-item {display:block;vertical-align:top;width:100%;}
ul.nav-tabs li.nav-item a.nav-link {width:100%;display:block;background-color:#0080FF;color:#fff;text-decoration:none;}
ul.nav-tabs li.nav-item a.nav-link:active,.nav-item a.nav-link:hover {color:red;background-color:red;}

Answer 3

使用此样式更改引导中活动选项卡的颜色

ul.nav li.active a {color:red;} 

您正在使用活动类进行标记。但是bootsrap为

标记提供了活动类。

这一切都取决于您的引导程序版本。