引导：悬停子菜单显示

Question

我想显示悬停在引导3.0中的子菜单。

以下简单的代码行正在为我工​​作。

ul.nav li.dropdown:hover > ul.dropdown-menu { 
    display: block;  
} 

这将显示菜单，当我将鼠标悬停在父元素上方之前，但在将鼠标移动到它消失的元素之前。

我必须点击顶部导航，使其不会消失。

请给我一个解决方案，我可以如何解决它。

Answer 1

您可以在整页使用下列jQuery脚本这个

$('ul.nav li.dropdown').hover(function() { 
    $(this).find('.dropdown-menu').stop(true, true).delay(200).fadeIn(500); 
}, function() { 
    $(this).find('.dropdown-menu').stop(true, true).delay(200).fadeOut(500); 
}); 

检查更新如下片段

$('ul.nav li.dropdown').hover(function() { 
 
    $(this).find('.dropdown-menu').stop(true, true).delay(200).fadeIn(500); 
 
}, function() { 
 
    $(this).find('.dropdown-menu').stop(true, true).delay(200).fadeOut(500); 
 
});

/* bootstrap dropdown hover menu*/ 
 

 
body { 
 
    font-family: 'PT Sans', sans-serif; 
 
    font-size: 13px; 
 
    font-weight: 400; 
 
    color: #4f5d6e; 
 
    position: relative; 
 
    background: rgb(26, 49, 95); 
 
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(26, 49, 95, 1)), color-stop(10%, rgba(26, 49, 95, 1)), color-stop(24%, rgba(29, 108, 141, 1)), color-stop(37%, rgba(41, 136, 151, 1)), color-stop(77%, rgba(39, 45, 100, 1)), color-stop(90%, rgba(26, 49, 95, 1)), color-stop(100%, rgba(26, 49, 95, 1))); 
 
    filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#1a315f', endColorstr='#1a315f', GradientType=0); 
 
} 
 

 
.body-wrap { 
 
    min-height: 700px; 
 
} 
 

 
.body-wrap { 
 
    position: relative; 
 
    z-index: 0; 
 
} 
 

 
.body-wrap:before, 
 
.body-wrap:after { 
 
    content: ''; 
 
    position: absolute; 
 
    top: 0; 
 
    left: 0; 
 
    right: 0; 
 
    z-index: -1; 
 
    height: 260px; 
 
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(26, 49, 95, 1)), color-stop(100%, rgba(26, 49, 95, 0))); 
 
    background: linear-gradient(to bottom, rgba(26, 49, 95, 1) 0%, rgba(26, 49, 95, 0) 100%); 
 
    filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#1a315f', endColorstr='#001a315f', GradientType=0); 
 
} 
 

 
.body-wrap:after { 
 
    top: auto; 
 
    bottom: 0; 
 
    background: linear-gradient(to bottom, rgba(26, 49, 95, 0) 0%, rgba(26, 49, 95, 1) 100%); 
 
    filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#001a315f', endColorstr='#1a315f', GradientType=0); 
 
} 
 

 
nav { 
 
    margin-top: 60px; 
 
    box-shadow: 5px 4px 5px #000; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<!-- Latest compiled and minified CSS --> 
 
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css"> 
 

 
<!-- Optional theme --> 
 
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap-theme.min.css"> 
 

 
<div class="body-wrap"> 
 
    <div class="container"> 
 
    <nav class="navbar navbar-inverse" role="navigation"> 
 
     <div class="container-fluid"> 
 
     <div class="navbar-header"> 
 
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> 
 
      <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> 
 

 
     <!-- Collect the nav links, forms, and other content for toggling --> 
 
     <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> 
 
      <ul class="nav navbar-nav"> 
 
      <li class="active"><a href="#">Link</a></li> 
 
      <li><a href="#">Link</a></li> 
 
      <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><a href="#">Separated link</a></li> 
 
       <li class="divider"></li> 
 
       <li><a href="#">One more separated link</a></li> 
 
       </ul> 
 
      </li> 
 
      </ul> 
 

 
      <ul class="nav navbar-nav navbar-right"> 
 
      <li><a href="#">Link</a></li> 
 
      <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><a href="#">Separated link</a></li> 
 
       </ul> 
 
      </li> 
 
      </ul> 
 
     </div> 
 
     <!-- /.navbar-collapse --> 
 
     </div> 
 
     <!-- /.container-fluid --> 
 
    </nav> 
 
    </div> 
 
</div>