我想将一些使用id标记的项目更改为一个单独的类,以便在我的CSS中我可以使用.sortsubmenu
而不是#sortsongmenu
,#sortartistmenu
来引用它们,等
问题在于,当我将其中一个从id更改为类时,它会弄乱格式化。在下面的图片中,关于songsubmenu和artistsubmenu的所有内容都是完全相同的,只有使用id识别的songsubmenu和使用class识别的artistsubmenu。
#topbar {
background-color: #222;
}
#topbar_wrapper {
width: 100%;
margin: 0 auto;
text-align: left;
}
#mainmenu {
list-style-type: none;
padding: 0px;
margin: 0px;
position: relative;
min-width: 200px;
}
#mainmenu li {
display: inline-block;
width: 200px;
}
#mainmenu li:hover {
background-color: #333;
}
#mainmenu li a {
color: #CCC;
display: block;
padding: 15px;
text-decoration: none;
}
#mainmenu li:hover > ul {
display: block;
}
#sortmenu {
display: none;
position: absolute;
background-color: #333;
border: 5px solid #222;
border-top: 0;
margin-left: -5px;
}
#sortmenu > li {
display: block;
position: relative;
}
#sortmenu li a:hover {
color: #699;
}
#sortmenu li:hover ul {
display: inline-block;
}
#sortsongmenu, .sortsubmenu {
display: none;
position: absolute;
background-color: #333;
border: 5px solid #222;
border-left: 0px;
text-align: right;
top: 0;
left: 100%;
width: 100px;
}
#sortsongmenu li, .sortsubmenu li {
display: inline;
}
#sortsongmenu li a:hover, .sortsubmenu li a:hover {
color: #DB7093;
}

<div id="topbar">
<div id="topbar_wrapper">
<ul id="mainmenu">
<li><a href="#">Home</a>
</li>
<li>
<a href="#">Search</a>
</li>
<li>
<a href="#">Sort By ▼</a>
<ul id="sortmenu">
<li><a href='#'>Song</a>
<ul id="sortsongmenu">
<li><a href='#'>A to Z</a>
</li>
<li>
<a href='#'>Z to A</a>
</li>
</ul>
</li>
<li>
<a href='#'>Artist</a>
<ul class="sortsubmenu">
<li><a href='#'>A to Z</a>
</li>
<li>
<a href='#'>Z to A</a>
</li>
</ul>
</li>
<li>
<a href='#'>Album</a>
</li>
<li>
<a href='#'>Genre</a>
</li>
<li>
<a href='#'>BPM</a>
</li>
<li>
<a href='#'>Release Date</a>
</li>
</ul>
</li>
<li>
<a href="#">Add Song</a>
</li>
<li>
<a href="#">Contact Us</a>
</li>
</ul>
</div>
</div>
&#13;
答案 0 :(得分:1)
#mainmenu li
规则阻碍了你。它没有被基于类的选择器覆盖,就像基于id的选择器一样。
只保留立即后代的定位/大小,即更改:
#mainmenu li {
到
#mainmenu > li {
一切都很顺利。
#topbar {
background-color: #222;
}
#topbar_wrapper {
width: 100%;
margin: 0 auto;
text-align: left;
}
#mainmenu {
list-style-type: none;
padding: 0px;
margin: 0px;
position: relative;
min-width: 200px;
}
#mainmenu > li {
display: inline-block;
width: 200px;
}
#mainmenu li:hover {
background-color: #333;
}
#mainmenu li a {
color: #CCC;
display: block;
padding: 15px;
text-decoration: none;
}
#mainmenu li:hover > ul {
display: block;
}
#sortmenu {
display: none;
position: absolute;
background-color: #333;
border: 5px solid #222;
border-top: 0;
margin-left: -5px;
}
#sortmenu > li {
display: block;
position: relative;
}
#sortmenu li a:hover {
color: #699;
}
#sortmenu li:hover ul {
display: inline-block;
}
#sortsongmenu,
.sortsubmenu {
display: none;
position: absolute;
background-color: #333;
border: 5px solid #222;
border-left: 0px;
text-align: right;
top: 0;
left: 100%;
width: 100px;
}
#sortsongmenu li,
.sortsubmenu li {
display: inline;
}
#sortsongmenu li a:hover,
.sortsubmenu li a:hover {
color: #DB7093;
}
&#13;
<div id="topbar">
<div id="topbar_wrapper">
<ul id="mainmenu">
<li><a href="#">Home</a>
</li>
<li>
<a href="#">Search</a>
</li>
<li>
<a href="#">Sort By ▼</a>
<ul id="sortmenu">
<li><a href='#'>Song</a>
<ul id="sortsongmenu">
<li><a href='#'>A to Z</a>
</li>
<li>
<a href='#'>Z to A</a>
</li>
</ul>
</li>
<li>
<a href='#'>Artist</a>
<ul class="sortsubmenu">
<li><a href='#'>A to Z</a>
</li>
<li>
<a href='#'>Z to A</a>
</li>
</ul>
</li>
<li>
<a href='#'>Album</a>
</li>
<li>
<a href='#'>Genre</a>
</li>
<li>
<a href='#'>BPM</a>
</li>
<li>
<a href='#'>Release Date</a>
</li>
</ul>
</li>
<li>
<a href="#">Add Song</a>
</li>
<li>
<a href="#">Contact Us</a>
</li>
</ul>
</div>
</div>
&#13;