【发布时间】：2015-09-23 23:00:47
【问题描述】：
我想在我的网页上使用以下下拉菜单：
HTML：
<div id="mn-wrapper">
<div class="mn-sidebar">
<div class="mn-toggle"><i class="fa fa-bars"></i></div>
<div class="mn-navblock">
<ul class="mn-vnavigation">
<li class="dropdown-submenu active">
<a tabindex="-1" href="#">Client Advice</a>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">Pre-advice</a></li>
<li><a href="#">Strategy & Technical</a></li>
<li><a href="#">Research</a></li>
<li class="dropdown-submenu active">
<a href="#">APL & Products</a>
<ul class="dropdown-menu parent">
<li style=" border-bottom: 1px solid #ccc;">
<a href="#">Approved Product List
<span aria-hidden="true" class="glyphicon glyphicon-plus pull-right"></span>
<span aria-hidden="true" class="glyphicon glyphicon-minus pull-right" style="display:none;"></span>
</a>
<ul class="child">
<li style="padding:10px 15px; color:white;">Platforms</li>
<li style="padding: 10px 15px; color:white;">Managed Funds</li>
<li style="padding: 10px 15px; color:white;">Wealth Protection</li>
<li style="padding: 10px 15px; color:white;">Listed Securities</li>
<li style="padding: 10px 15px; color:white;">Wealth Protection</li>
<li style="padding: 10px 15px; color:white;">Listed Securities</li>
<li style="padding: 10px 15px; color:white;">Listed Securities</li>
</ul>
</li>
<li style=" border-bottom: 1px solid #ccc;"><a href="#">Model Portfolios</a></li>
<li style=" border-bottom: 1px solid #ccc;"><a href="#">Non-approved Products</a></li>
</ul>
</li>
<li><a href="#">Implementation</a></li>
<li><a href="#">Review</a></li>
<li><a href="#">Execution Only</a></li>
</ul>
</li>
<li><a href="#">Personal Development</a></li>
<li><a href="#">Practice</a></li>
<li><a href="#">News</a></li>
</ul>
</div>
<div class="bottom-mn">
<ul class="mn-vnavigation">
<li>
<a href="#">My Favourite</a>
</li>
<li>
<a href="#">Most Popular</a>
</li>
</ul>
</div>
</div>
<div class="container" id="mn-cont">
<div class="cnt-mcont">
<h1>Title Page</h1>
</div>
</div>
</div>
CSS：
html{
height:100%;
}
body{
height:50%;
position: relative;
}
.dropdown-submenu {
border-bottom: 1px solid #ccc;
}
#mn-wrapper {
display: table;
width: 100%;
position: absolute;
height: 100%;
}
.mn-sidebar {
display: table-cell;
position: relative;
vertical-align: top;
padding-bottom: 49px;
background: #272930;
width: 216px;
z-index: 2;
}
#mn-cont {
display: table-cell;
vertical-align: top;
position: relative;
padding: 0;
}
.container {
margin-right: auto;
}
.cnt-mcont {
background-color: #F6F6F6;
color: inherit;
font-size: 13px;
font-weight: 200;
line-height: 21px;
padding: 15px 30px 30px 30px;
margin-top: 0;
height: 101vh;
}
.mn-sidebar .mn-toggle {
display: none;
padding: 10px 0;
text-align: center;
cursor: pointer;
}
.mn-vnavigation {
margin: 0 0 0 0;
padding: 0;
border-top: 1px solid #1a1c20;
border-bottom: 1px solid #2f323a;
}
.mn-vnavigation li a {
border-top: 1px solid #32353e;
border-bottom: 1px solid #1a1c20;
display: block;
padding: 14px 18px 13px 15px;
color: #fff;
text-decoration: none;
font-size: 12px;
font-weight: 300;
text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
white-space: nowrap;
}
.dropdown-submenu >
.dropdown-menu {
top: 0;
left: 100%;
margin-top: -6px;
margin-left: -1px;
height: 101vh;
width: 216px;
background: #272930;
}
.dropdown-submenu:hover >
.dropdown-menu {
display: block;
}
.dropdown-submenu > a:after {
display: block;
content: " ";
float: right;
width: 0;
height: 0;
border-color: transparent;
border-style: solid;
border-width: 5px 0 5px 5px;
border-left-color: #ccc;
margin-top: 5px;
margin-right: -10px;
}
.dropdown-submenu:hover > a:after {
border-left-color: #fff;
}
.dropdown-submenu.pull-left {
float: none;
}
.dropdown-submenu.pull-left > .dropdown-menu {
left: -100%;
margin-left: 10px;
-webkit-border-radius: 6px 0 6px 6px;
-moz-border-radius: 6px 0 6px 6px;
border-radius: 6px 0 6px 6px;
}
ul {
list-style: none;
}
ul.dropdown-menu.parent {
margin-top: -1px;
}
.bottom-mn {
bottom:0px;
position:absolute;
width:100%;
}
JS：
$('.child').hide(); //Hide children by default
$('.parent').children().click(function () {
event.preventDefault();
$(this).children('.child').slideToggle('slow');
$(this).find('span').toggle();
});
http://codepen.io/MaGiO/pen/YXXzeJ
但是，当我将鼠标悬停在任何列表项上并打开另一个子列表时，我不希望黑色部分延伸到屏幕末尾，我希望当我将鼠标悬停在一个列表项上时，一个新的列表只延伸到最后一个列表项应该出现。我对此有何改变？
另外，当我尝试在 CSS 的 .mn-sidebar 中使用 margin-left 时，下拉菜单会向右移动，但在第一个列表项之前（在下拉菜单之外）会出现一个项目符号，这是为什么呢发生？我希望下拉菜单显示在右侧。
【问题讨论】：
-
如果以下答案对您有帮助，请接受它
标签： javascript html css