CSS + HTML下拉菜单重叠问题 [英] CSS + HTML dropdown menu overlapping issue
问题描述
我的下拉菜单子项与父元素重叠有问题。请检查我的小提琴以了解问题:
HTML代码:
< div id =main_category_menu>
< ul id =menu>
< li>
< a href =#>类别< / a>
< div class =menu-container>
< h3>文字在这里< / h3>
物品数量:tralala< hr />
< ul class =menu_category>
< li class =menu_subcategory>
< a href =browse.php?id = 76>
广告(0)
< / a>
< / li>
< li class =menu_subcategory>
< a href =browse.php?id = 76>
Blalala(0)
< / a>
< / li>
< li class =menu_subcategory>
< a href =browse.php?id = 76>
超级威震天(0)
< / a>
< / li>
< / ul>
< / div>
< / li>
< / ul>
< / div>
CSS code:
#main_category_menu {
width:100%;
}
#menu ul,#menu li {
line-height:22px;
text-align:left;
font-size:14px;
}
#menu {
list-style:none;
宽度:100%;
margin:0 auto;
height:45px;
padding:5px 30px;
}
#menu li {
float:left;
display:block;
职位:亲属;
text-align:center;
padding:4px 10px;
margin:7px 30px 0 0;
border:none;
}
#menu li:hover {
border:1px solid#b7b7b7;
border-bottom:none;
padding:4px 9px;
背景:黄色;
border-radius:5px 5px 0 0;
-moz-border-radius:5px 5px 0 0;
-webkit-border-radius:5px 5px 0 0;
z-index:10;
}
#menu li a {
font-size:14px;
颜色:#444444;
display:block;
outline:0;
text-decoration:none;
}
#menu li:悬停{b $ b color:#161616;
}
#menu .menu-container {
margin:0px auto;
float:left;
位置:绝对;剩余
:-999em;
text-align:left;
padding:10px 5px;
border:1px solid#b7b7b7;
background-color:#ffffff;
border-radius:0 5px 5px 5px;
-moz-border-radius:0 5px 5px 5px;
-webkit-border-radius:0 5px 5px 5px;
}
#menu .menu-container {
width:280px;
背景:透明网址('logo.gif')不重复右下;
}
#menu li:hover .menu-container {
top:auto;
left:-1px;
}
#menu p,#menu h2,#menu h3,#menu ul li {
line-height:21px;
font-size:12px;
text-align:left;
}
#menu p {
line-height:18px;
margin-bottom:10px;
颜色:#F2E8E8;
}
#menu h3,#menu h2 {
font-size:11px;
margin:7px 0 14px 0;
padding-bottom:5px;
text-transform:大写;
颜色:#999999;
}
#menu li:hover div a {
color:#666666;
font-size:11px;
padding-left:6px;
}
#menu li:hover div a:hover {
color:#FAFAFA;
背景:#99DE00;
}
#menu li ul {
list-style:none;
padding:0;
margin-bottom:12px;
}
#menu li ul li {
float:none;
font-size:12px;
line-height:24px;
保证金:0;
padding:0;
职位:亲属;
text-align:left;
宽度:100%;
}
#menu li ul li:hover {
background:none;
border:中等none;
保证金:0;
padding:0;
}
我需要这样的:
结果图示例
试图添加z-index;但它不适合我。任何建议都会受到欢迎。
谢谢! :)
这个问题与堆栈命令有关。
<由于 li
包含 .menu-container
和 li
已经有一个堆栈上下文, .menu-container
会在其中创建一个子上下文,并且永远不会显示在其下面。您需要做的是从堆叠订单中取出 li
,然后给 .menu-container
一个负值 z-index
,它显示在它下面。但是,如果 li
的祖先不在堆栈上下文中,那么您的 .menu-container
可能会显示在页面下方内容。因此,你可能应该有一个 li
的父项,并且有一个 z-index
和相应的位置来放置堆叠顺序。
我不知道IE6 / IE7能否正常工作。
这是一个分叉的JSFiddle,用于显示更改。( li
不再有一个 z-index
和 .menu-container
现在有一个负值 z-index
;同时父元素 ul#menu
现在放入堆栈顺序中,以便 .menu-container
不会显示在页面内容下面)
I have a problem with dropdown menu children overlapping parent element. Please check my fiddle to understand the problem: Fiddle example
HTML code:
<div id="main_category_menu">
<ul id="menu">
<li>
<a href="#">Category</a>
<div class="menu-container">
<h3>Text goes here</h3>
Items count: tralala<hr/>
<ul class="menu_category">
<li class="menu_subcategory">
<a href="browse.php?id=76">
Advertising(0)
</a>
</li>
<li class="menu_subcategory">
<a href="browse.php?id=76">
Blalala(0)
</a>
</li>
<li class="menu_subcategory">
<a href="browse.php?id=76">
Super megatron(0)
</a>
</li>
</ul>
</div>
</li>
</ul>
</div>
CSS code:
#main_category_menu{
width: 100%;
}
#menu ul, #menu li {
line-height:22px;
text-align:left;
font-size:14px;
}
#menu {
list-style:none;
width:100%;
margin:0 auto;
height:45px;
padding:5px 30px;
}
#menu li {
float:left;
display:block;
position:relative;
text-align:center;
padding:4px 10px;
margin:7px 30px 0 0;
border:none;
}
#menu li:hover {
border:1px solid #b7b7b7;
border-bottom: none;
padding:4px 9px;
background: yellow;
border-radius:5px 5px 0 0;
-moz-border-radius:5px 5px 0 0;
-webkit-border-radius:5px 5px 0 0;
z-index: 10;
}
#menu li a {
font-size:14px;
color: #444444;
display:block;
outline:0;
text-decoration:none;
}
#menu li:hover a {
color:#161616;
}
#menu .menu-container{
margin:0px auto;
float:left;
position:absolute;
left:-999em;
text-align:left;
padding:10px 5px;
border:1px solid #b7b7b7;
background-color: #ffffff;
border-radius:0 5px 5px 5px;
-moz-border-radius:0 5px 5px 5px;
-webkit-border-radius:0 5px 5px 5px;
}
#menu .menu-container {
width:280px;
background: transparent url('logo.gif') no-repeat right bottom;
}
#menu li:hover .menu-container{
top:auto;
left:-1px;
}
#menu p, #menu h2, #menu h3, #menu ul li {
line-height:21px;
font-size:12px;
text-align:left;
}
#menu p {
line-height:18px;
margin-bottom:10px;
color:#F2E8E8;
}
#menu h3, #menu h2 {
font-size:11px;
margin:7px 0 14px 0;
padding-bottom:5px;
text-transform:uppercase;
color: #999999;
}
#menu li:hover div a {
color: #666666;
font-size: 11px;
padding-left: 6px;
}
#menu li:hover div a:hover {
color: #FAFAFA;
background:#99DE00;
}
#menu li ul {
list-style:none;
padding:0;
margin-bottom:12px;
}
#menu li ul li {
float: none;
font-size: 12px;
line-height: 24px;
margin: 0;
padding: 0;
position: relative;
text-align: left;
width: 100%;
}
#menu li ul li:hover {
background: none;
border: medium none;
margin: 0;
padding: 0;
}
I need this to be like: Result image example
Tried to adding z-index; but it doesn't work for my. Any suggestion would be appriciated. Thanks! :)
The issue is with stack(ing) order.
Since li
contains .menu-container
and li
has a stacking context already, .menu-container
creates a sub-context within it and can never be shown below it. What you need to do is take li
out of stacking order, and then give .menu-container
a negative z-index
for it show up below it. However, if no ancestor of li
is in a stacking context, your .menu-container
may show up below the page content. Thus, you should probably have a parent of li
have a z-index
and accompanying position to put it in stacking order.
I am not sure if this works correctly on IE6/IE7 or not.
Here is a forked JSFiddle showing the changes. (li
no longer has a z-index
and .menu-container
now has a negative z-index
; also the parent ul#menu
is now put into stacking order so that .menu-container
does not show up below page content)
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