html - Bootstrap 3下拉菜单更改子菜单焦点的背景

Question

我已经更改了 Bootstrap 菜单的背景颜色，但是当子菜单（单击下拉项时打开的菜单）处于焦点时（即我的鼠标结束时，列表中主下拉项的背景颜色正在更改）它）。

这是悬停时的下拉菜单（按预期运行）：

这是当我将鼠标悬停在单击下拉菜单时打开的子菜单上时的下拉菜单（背景颜色不是我想要的；我希望背景颜色保持不变）：

这是HTML：

<li class="dropdown">
    <a href="#" class="dropdown-toggle" data-toggle="dropdown">
        Dropdown <b class="caret"></b>
    </a>
    <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li class="dropdown-header">Nav header</li>
        <li><a href="#">Separated link</a></li>
        <li><a href="#">One more separated link</a></li>
    </ul>
</li>

和CSS：

.navbar-mainnav  {
    background-color: #883333;
    background-image: none;
}

.navbar-mainnav a, .navbar-mainnav a:hover {
    color: #FFFFFF;
}

.navbar-mainnav .navbar-nav > .active > a, .navbar-nav > .active > a:hover, .navbar-nav > .active > a:focus {
    color: #ffffff;
    background-color:transparent;
}

.navbar-mainnav .nav > li > a:hover, .mainnav > li.dropdown.open  {
  background-image: none;
  background-color: #B54646;
}

.navbar-mainnav .dropdown-menu > li > a:hover, .navbar-mainnav .dropdown-menu > li > a:focus {
  background-color: white;
  background-image: none;
  filter: none;
}

.navbar-mainnav .dropdown-menu > li > a:hover {
  background-color: #CC6666;
  background-image: none;
}

Answer 1

只要把这个 css 我认为这是有效的

.navbar .nav li.dropdown.open > .dropdown-toggle, .navbar .nav li.dropdown.active > .dropdown-toggle, .navbar .nav li.dropdown.open.active > .dropdown-toggle {
background-color: #B54646;
}

Answer 2

也许试试这个？请发布一个 jsfiddle，以便我们确保它有效。

.navbar-default .navbar-nav > li:hover {
  background: #your-background-color;
  color: #your-text-color;
}

Answer 3

您需要设置.open类的锚标记子项的样式，以及:hover像:focus这样的状态：

.navbar-mainnav .nav .open>a, 
.navbar-mainnav .nav .open>a:focus, 
.navbar-mainnav .nav .open>a:hover {
  background: #B54646;
  color: #fff;
}

在整页中运行代码片段，看看它是如何工作的。

.navbar-mainnav  {
    background-color: #883333;
    background-image: none;
}

.navbar-mainnav a, .navbar-mainnav a:hover {
    color: #FFFFFF;
}

.navbar-mainnav .navbar-nav > .active > a, .navbar-nav > .active > a:hover, .navbar-nav > .active > a:focus {
    color: #ffffff;
    background-color:transparent;
}

.navbar-mainnav .nav > li > a:hover, .mainnav > li.dropdown.open  {
  background-image: none;
  background-color: #B54646;
}

.navbar-mainnav .dropdown-menu > li > a:hover, .navbar-mainnav .dropdown-menu > li > a:focus {
  background-color: white;
  background-image: none;
  filter: none;
}

.navbar-mainnav .dropdown-menu > li > a:hover {
  background-color: #CC6666;
  background-image: none;
}

.navbar-mainnav .nav .open>a, 
.navbar-mainnav .nav .open>a:focus, 
.navbar-mainnav .nav .open>a:hover {
  background: #B54646;
  color: #fff;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>

<nav class="navbar navbar-mainnav">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Brand</a>
    </div>

    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
        <li><a href="#">Link</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">One more separated link</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

Answer 4

这是一个工作小提琴：https ://jsfiddle.net/Lindow/yvyvg1ja/4/

要防止背景在下拉菜单中更改，请单击使用：

.navbar-default .navbar-nav > .open > a, .navbar-default .navbar-nav > .open > a:focus, .navbar-default .navbar-nav > .open > a:hover {
    background-color: #CC6666;
}