CSS -当单击子菜单时，保持父菜单展开和子菜单突出显示
CSS - Keep the parent expanded and sub menu highlighted when clicked on the submenu.
我有一个CSS垂直菜单和子菜单。我在ASP中添加了这个。Net应用程序在母版页。每次菜单点击都会导航到不同的aspx页面。当单击展开的父菜单中的任何子菜单时，该页被重定向到相应的aspx页面，但是父菜单再次折叠，并且不再保留突出显示的子菜单。我希望父菜单展开和子菜单点击是高度。
(function($) {
$(document).ready(function() {
$('#cssmenu li.has-sub>a').on('click', function() {
$(this).removeAttr('href');
var element = $(this).parent('li');
if (element.hasClass('open')) {
element.removeClass('open');
element.find('li').removeClass('open');
element.find('ul').slideUp();
}
else {
element.addClass('open');
element.children('ul').slideDown();
element.siblings('li').children('ul').slideUp();
element.siblings('li').removeClass('open');
element.siblings('li').find('li').removeClass('open');
element.siblings('li').find('ul').slideUp();
}
});
});
})(jQuery);
<div id="cssmenu" >
<ul >
<li class="highlight">
<a id="upload" href="Upload.aspx" ><span>Upload</span></a>
</li>
<li >
<a id="home" href="Home.aspx" ><span>Home</span></a>
</li>
<li>
<a href='Configurable Parameters.aspx'><span>configurable Parameters</span></a>
</li>
<li class='active has-sub'>
<a href='#'><span>Input</span></a>
<ul>
<li class='last'>
<a href="#"><span>Data - QRM</span></a>
</li>
<li class='last'>
<a href="DMSwaps.aspx"><span>Data Murex - Swaps</span></a>
</li>
<li class='last'>
<a href="DMMRates.aspx"><span>Data Murex - Market rates</span></a>
</li>
<li class='last'>
<a href="#"><span>Data - Previous Months</span></a>
</li>
</ul>
</li>
<li class='active has-sub'>
<a href='#'><span>DF Rate</span></a>
<ul>
<li class='last'>
<a href='#'><span>DF Rate - Prospective</span></a>
</li>
<li class='last'>
<a href='#'><span>DF Rate - RetroProspective</span></a>
</li>
</ul>
</li>
<li><a href='#'><span>Designation</span></a></li>
<li class='active has-sub'>
<a href='#'><span>Regression Analysis</span></a>
<ul>
<li class='last'>
<a href='#'><span>Regression Test Prospective</span></a>
</li>
<li class='last'>
<a href='#'><span>Regression Test - RetroProspective</span></a>
</li>
</ul>
</li>
<li class='active has-sub'><a href='#'><span>Fair Valuation</span></a>
<ul>
<li class='last'><a href='#'><span>benchmark calculation hedged item</span></a>
</li>
<li class='last'><a href='#'><span>Test Result</span></a> </li>
<li class='last'><a href='#'><span>Delta FV</span></a> </li>
</ul>
</li>
<li class='active has-sub'><a href='#'><span>Amortisation</span></a>
<ul>
<li class='last'><a href='#'><span>Amortisation</span></a> </li>
<li class='last'><a href='#'><span>Reverse Amortisation</span></a> </li>
<li class='last'><a href='#'><span>Amortisation, if hedge is ineffective</span></a>
</li>
</ul>
</li>
<li class='active has-sub'><a href='#'><span>Output</span></a>
<ul>
<li class='last'><a href='#'><span>Accounting Entries</span></a> </li>
<li class='last'><a href='#'><span>Infor Next Period</span></a> </li>
</ul>
</li>
<li><a href='#'><span>Reports</span></a> </li>
</ul>
</div>
#cssmenu {
position: relative;
margin: 0;
font-family: 'Roboto Condensed';
line-height: 1;
width: 250px;
}
.align-right {
float: right;
}
#cssmenu ul {
margin: 0;
padding: 0;
list-style: none;
display: block;
}
#cssmenu ul li {
position: relative;
margin: 0;
padding: 0;
}
#cssmenu ul li a {
text-decoration: none;
cursor: pointer;
}
#cssmenu > ul > li > a {
color: #00802b;
text-transform: uppercase;
display: block;
padding: 20px;
border-top: 1px solid #00802b;
border-left: 1px solid #000000;
border-right: 1px solid #000000;
background:url("../images/img04.gif") ;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
letter-spacing: 1px;
font-size: 14px;
font-weight: 650;
-webkit-transiton: all 0.25s ease-in;
-moz-transition: all 0.25s ease-in;
-ms-transition: all 0.25s ease-in;
-o-transition: all 0.25s ease-in;
transition: all 0.25s ease-in;
position: relative;
}
#cssmenu > ul > li:first-child > a {
border-top-left-radius: 3px;
border-top-right-radius: 3px;
}
#cssmenu > ul > li:last-child > a {
border-bottom-left-radius: 3px;
border-bottom-right-radius: 3px;
border-bottom: 1px solid #000000;
}
#cssmenu > ul > li:hover > a,
#cssmenu > ul > li.open > a,
#cssmenu > ul {
background-image: url(../images/content_grey.jpg);
color: white; nu_button.jpg) repeat-x;
}
#cssmenu ul > li.has-sub > a::after {
content: "";
position: absolute;
display: block;
width: 0;
height: 0;
border-top: 13px solid #00802b;
border-botom: 13px solid transparent;
border-left: 125px solid transparent;
border-right: 125px solid transparent;
left: 0;
bottom: -13px;
bottom: 0px;
z-index: 1;
opacity: 0;
-webkit-transition: all .2s ease;
-moz-transition: all .2s ease;
-ms-transition: all .2s ease;
-o-transition: all .2s ease;
transition: all .2s ease;
}
#cssmenu ul > li.has-sub > a::before {
content: "";
position: absolute;
display: block;
width: 0;
height: 0;
border-top: 13px solid #151515;
border-botom: 13px solid transparent;
border-left: 125px solid transparent;
border-right: 125px solid transparent;
left: 0;
bottom: -12px;
bottom: -1px;
z-index: 3;
opacity: 0;
-webkit-transition: all .2s ease;
-moz-transition: all .2s ease;
-ms-transition: all .2s ease;
-o-transition: all .2s ease;
transition: all .2s ease;
}
#cssmenu ul > li.has-sub::after {
content: "";
display: block;
position: absolute;
width: 0;
height: 0;
border: 7px solid transparent;
border-top-color: #dddddd;
z-index: 2;
right: 20px;
top: 24.5px;
pointer-events: none;
}
#cssmenu ul > li:hover::after,
#cssmenu ul > li.active::after,
#cssmenu ul > li.open::after {
border-top-color: #dddddd;
}
#cssmenu ul > li.has-sub.open > a::after {
opacity: 1;
bottom: -13px;
}
#cssmenu ul > li.has-sub.open > a::before {
opacity: 1;
bottom: -12px;
}
#cssmenu ul ul {
display: none;
}
#cssmenu ul ul li {
border-left: 1px solid #ccc;
border-right: 1px solid #ccc;
}
#cssmenu ul ul li a {
background: white;
display: block;
position: relative;
font-size: 15px;
padding: 14px 20px;
border-bottom: 1px solid #dddddd;
color: #777777;
font-weight: 300;
-webkit-transition: all 0.25s ease-in;
-moz-transition: all 0.25s ease-in;
-ms-transition: all 0.25s ease-in;
-o-transition: all 0.25s ease-in;
transition: all 0.25s ease-in;
}
#cssmenu ul ul li:first-child > a {
padding-top: 18px;
}
#cssmenu ul ul ul li {
border: 0;
}
#cssmenu ul ul li:hover > a,
#cssmenu ul ul li.open > a,
#cssmenu ul ul li.active > a {
background: #e4e4e4;
color: #666666;
}
#cssmenu ul ul > li.has-sub > a::after {
border-top: 13px solid #dddddd;
}
#cssmenu ul ul > li.has-sub > a::before {
border-top: 13px solid #e4e4e4;
}
#cssmenu ul ul ul li a {
padding-left: 30px;
}
#cssmenu ul ul > li.has-sub::after {
top: 18.5px;
border-width: 6px;
border-top-color: #777777;
}
#cssmenu ul ul > li:hover::after,
#cssmenu ul ul > li.active::after,
#cssmenu ul ul > li.open::after {
border-top-color: #666666;
}
问题是，当您重新加载页面时，您对DOM所做的所有更改都会丢失。一种选择是，在页面加载时，根据当前路径检查所有a元素的href属性。如果有匹配，那么您可以应用"打开"逻辑。代码大致如下:
$(document).ready(function(){
$('a').each(function(){
if($(this).attr('href') == location.pathname.substr(1))
{
//apply your 'open' logic here
}
});
//....Other code
});
*注意:这段代码的工作原理，如果你的链接只是相对路径没有查询字符串，没有领先的/字符(这是他们如何出现在你的问题)。如果它们是绝对的，有查询字符串，或者有领先的/，您将不得不在我的答案中进行普通$(this).attr('href') == location.pathname.substr(1)比较之前做一些字符串处理。
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