[英]How to change background colour of individual list items of a nested list upon hover (and to full menu width)
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type='text/css' media='all'>
#menu {width: 50%;}
.high {background: #0F0;}
.list-item :hover {background: #000;}
/* non essential styles */
.list-item a{text-decoration: none;}
.list-item :hover a{color: #FFF;}
</style>
</head>
<body>
<div id="menu" >
<ul>
<li class="list-item">
<div class="level-0 high" id="P0">
<a href="#">P0</a>
</div>
<ul>
<li class="list-item">
<div class="level-1" id="C0-P0">
<a href="#">C0-P0</a>
</div>
</li>
<li class="list-item">
<div class="level-1" id="C1-P0">
<a href="#">C1-P0</a>
</div>
</li>
</ul>
</li>
<li class="list-item">
<div class="level-0" id="P1">
<a href="#">P1</a>
</div>
<ul>
<li class="list-item">
<div class="level-1" id="C0-P1">
<a href="#">C0-P1</a>
</div>
</li>
<li class="list-item">
<div class="level-1" id="C1-P1">
<a href="#">C1-P1</a>
</div>
</li>
</ul>
</li>
</ul>
</div>
</body>
Structure: 结构体:
P0 P0
__ C0-P0 __ C0-P0
__ C1-P0 __ C1-P0
P1 P1
__ C0-P1 __ C0-P1
__ C1-P1 __ C1-P1
Currently I am unable to select and change background (upon hover) of Child items individually. 目前,我无法单独选择和更改子项的背景(悬停时)。
However if I try to use first-child
selectors - I am able to select each list item individually. 但是,如果我尝试使用
first-child
选择器,则可以单独选择每个列表项。 But - 但是-
then the parent's selections are limited to only the anchor width and not the full menu width. 那么父级的选择将仅限于锚点宽度,而不是整个菜单宽度。
It's not really clear what you're asking but there should not be a space between :hover
and the element. 目前还不清楚您要问什么,但是
:hover
和element之间不应有空格。
It should be .list-item:hover {...}
not .list-item :hover {...}
它应该是
.list-item:hover {...}
而不是.list-item :hover {...}
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