多级导航菜单不显示第3级 [英] Multilevel Nav Menu not showing 3rd level
问题描述
我的菜单的第三级在悬停在第二级时不显示。我知道这是因为 overflow:hidden
的样式是在第二级 ul
,但是,如果我使 overflow:visible
,则 max-height
的过渡效果无法正常工作。我试着用 overflow-x:visible
制作 overflow-y:hidden
但添加了一个水平滚动条,您需要向右滚动以查看第三级菜单。如果你能解决这个问题,我有另一个问题,一个赏金,我只得到了1个不好的答案:
我的jsFiddle 和以下相关代码:
#menu li> ul {
position:absolute;
top:auto;
left:0;
width:180px;
max-height:0;
box-shadow:1px 2px 10px rgba(100,100,100,0.3);
visibility:hidden;
z-index:99999;
overflow:hidden;
-webkit-transition:max-height 0.2s ease,visibility 0s linear 0.5s;
-moz-transition:max-height 0.2s ease,visibility 0s linear 0.5s;
-o-transition:max-height 0.2s ease,visibility 0s linear 0.5s;
-ms-transition:max-height 0.2s ease,visibility 0s linear 0.5s;
transition:max-height 0.2s ease,visibility 0s linear 0.5s;
background:inherit!important;
}
#menu ul li:hover> ul {
visibility:visible;
max-height:216px;
transition-delay:0s;
}
#menu li> ul> li> ul {
position:absolute;
top:0!important;
left:180px!important;
width:180px;
overflow:hidden;
box-shadow:1px 2px 10px rgba(100,100,100,0.3);
visibility:hidden;
}
html:
< nav id =menu>
< ul id =main-nav>
< li id =port>< a href =portfolio.html> Portfolio< / a>
< ul>
< li id =regular>< a href =#> Regular< / a>
< ul>
< li id =4col>< a href =#> 4列< / a>
< / li>
< / ul>
< / li>
< / ul>
< / li>
< li id =aboutclass =parent menu-item>< a href =>关于< / a&
< / li>
< / ul>
< / nav>
解决方案添加 overflow:visible
,当悬停在 ul
元素。在这样做时,转换仍然会发生,因为溢出在悬停在元素之前是隐藏的。
#menu ul li > ul:hover {
overflow:visible;
}
the third level of my menu doesn't show up when hovering the 2nd level. I know that this is because overflow:hidden
is styled on the 2nd level ul
, however, if I make overflow:visible
then the transition effect with max-height
doesn't work properly. I have tried making overflow-y:hidden
with overflow-x:visible
and that does allow the transition to still work but adds a horizontal scroll bar that you need to scroll to the right to see the 3rd level menu. If you can solve this, i have another question with a bounty on it that I have only gotten 1 poor answer on: BOUNTY QUESTION
My jsFiddle and the relevant code below:
#menu li > ul {
position:absolute;
top:auto;
left:0;
width:180px;
max-height:0;
box-shadow:1px 2px 10px rgba(100, 100, 100, 0.3);
visibility: hidden;
z-index:99999;
overflow:hidden;
-webkit-transition: max-height 0.2s ease, visibility 0s linear 0.5s;
-moz-transition: max-height 0.2s ease, visibility 0s linear 0.5s;
-o-transition: max-height 0.2s ease, visibility 0s linear 0.5s;
-ms-transition: max-height 0.2s ease, visibility 0s linear 0.5s;
transition: max-height 0.2s ease, visibility 0s linear 0.5s;
background: inherit !important;
}
#menu ul li:hover > ul {
visibility: visible;
max-height: 216px;
transition-delay: 0s;
}
#menu li > ul > li > ul {
position:absolute;
top:0 !important;
left:180px !important;
width:180px;
overflow:hidden;
box-shadow:1px 2px 10px rgba(100, 100, 100, 0.3);
visibility:hidden;
}
html:
<nav id="menu">
<ul id="main-nav">
<li id="port"><a href="portfolio.html">Portfolio</a>
<ul>
<li id="regular"><a href="#">Regular</a>
<ul>
<li id="4col"><a href="#">4 columns</a>
</li>
</ul>
</li>
</ul>
</li>
<li id="about" class="parent menu-item"><a href="">About</a>
</li>
</ul>
</nav>
解决方案 Add overflow:visible
when hovering over the ul
element. In doing so, the transition will still take place because the overflow is hidden prior to hovering over the element.
#menu ul li > ul:hover {
overflow:visible;
}
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