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    今天给大家分享的是关于css怎样实现水平排列菜单的内容，水平菜单比较常见，很多网站都会设计和使用水平菜单，下文介绍的是用CSS3写的简单的水平菜单效果，对新手学习和了解CSS3制作网页特效有一定的帮助，感兴趣的朋友接下来跟随小编一起看看吧。

    实现效果：

    实现代码

    html

<nav class="dropdownmenu">
  <ul>
    <li><a href="http://www.jochaho.com/wordpress/">脚本之家</a></li>
    <li><a href="http://www.jochaho.com/wordpress/about-pritesh-badge/">jb51</a></li>
    <li><a href="#">Articles on HTML5 & CSS3</a>
      <ul id="submenu">
        <li><a href="http://www.jochaho.com/wordpress/difference-between-svg-vs-canvas/">Difference between SVG vs. Canvas</a></li>
        <li><a href="http://www.jochaho.com/wordpress/new-features-in-html5/">New features in HTML5</a></li>
        <li><a href="http://www.jochaho.com/wordpress/creating-links-to-sections-within-a-webpage/">Creating links to sections within a webpage</a></li>
      </ul>
    </li>
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    <li><a href="http://www.jochaho.com/wordpress/about-pritesh-badge/">Contact Us</a></li>
  </ul>
</nav>

    CSS3

.dropdownmenu ul, .dropdownmenu li {
	margin: 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;
	display: 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 per top nav padding top & bottom comes */
	visibility: visible;
}
#submenu li {
	float: none;
	width: 100%;
}
#submenu a:hover {
	background: #DF4B05;
}
#submenu a {
	background-color:#000000;
}

    以上就是用css做水平排列菜单的介绍了，上述示例具有一定的借鉴价值，有需要的朋友可以参考学习，希望对大家学习CSS有帮助，想要了解更多CSS实现菜单的内容，大家可以继续浏览群英网络其他相关的文章。

文本转载自脚本之家