CSS实战-下拉菜单

1. 下拉菜单

<div class="dropdown-menu">
<span class="dropdown-menu-btn">标记</span>
<div class="dropdown-menu-content">
<p><a href="javascript: " onclick="addTag('标签1')">tag1</a></p>
<p><a href="javascript: " onclick="addTag('标签2')">tag2</a></p>
</div>
</div>

.dropdown-menu {
position: relative;
display: inline-block;
margin: 0px 10px;
}
.dropdown-menu:hover {
opacity: 0.8; filter:alpha(opacity=80);
}
.dropdown-menu >  .dropdown-menu-btn {
display: inline-block;
vertical-align: middle;
background-color: #009688;
color: #fff;
white-space: nowrap;
text-align: center;
border: none;
border-radius: 2px;
cursor: pointer;
height: 30px;
line-height: 30px;
padding: 0 10px;
font-size: 12px;
}
.dropdown-menu-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 60px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
padding: 6px 12px;
white-space: nowrap;
}
.dropdown-menu:hover .dropdown-menu-content {
display: block;
}
.dropdown-menu-content > p {
margin: 5px;
}
.dropdown-menu-content > p > a {
color: black;
cursor: pointer;
}
.dropdown-menu-content > p > a:hover {
color: #018074;
font-weight: bold;
}