实现效果:
实现代码
ht ML
<nav class="dropdownmenu">
<ul>
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<li><a href="http://HdhCmsTestjochaho测试数据/word PR ess/about-pr IT esh-badge/">jb51</a></li>
<li><a href=" # ">Articles on HTML5 & am p; CSS3</a>
<ul id="s ub menu">
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</ul>
</nav>
CSS3
.dropdownmenu ul, .dropdownmenu li {
m arg in: 0;
padding: 0;
}
.dropdownmenu ul {
background: gray;
list-style: none;
width: 100%;
}
.dropdownmenu li {
float: left;
position: relative;
width:auto;
}
.dropdownmenu a {
background: #30A6E6;
color: #FFFFFF;
dis play : block;
font: bold 12px/20px sans-serif;
padding: 10px 25px;
text-align: center ;
text-decoration: none;
- webkit -transition: all .25s ease;
-moz-transition: all .25s ease;
-ms-transition: all .25s ease;
-o-transition: all .25s ease;
transition: all .25s ease;
}
.dropdownmenu li:hover a {
background: #000000;
}
#submenu {
left: 0;
opacity: 0;
position: absolute;
top: 35px;
visibility: hidden;
z-index: 1;
}
li:hover ul#submenu {
opacity: 1;
top: 40px; /* adjust this as PE r top nav padding top & bottom comes */
visibility: visible;
}
#submenu li {
float: none;
width: 100%;
}
#submenu a:hover {
background: # DF 4B05;
}
#submenu a {
background-color:#000000;
}
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