本篇内容介绍了“用jquery和css3实现的响应式二级导航菜单”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
之前分享了很多纯css的导航菜单，今天给大家分享一款基于jquery和css3的响应式二级导航菜单，这款导航是传统的基于顶部，鼠标经过的时候显示二级导航，还采用了当前流行的响应式设计。效果图如下：
实现的代码。
html代码：
XML/HTML Code复制内容到剪贴板
<div id="header">
<div class="logo">
<a href="#">Responsive Nav</a>
</div>
<nav>
<form class="search" action="search.php">
<input name="q" placeholder="Search..." type="search">
</form>
<ul>
<li><a href="">Home</a> </li>
<li><a href="">About</a>
<ul class="mega-dropdown">
<li class="row">
<ul class="mega-col">
<li><a href="#">About</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
<li><a href="#">Contact</a></li>
</ul>
<ul class="mega-col">
<li><a href="#">Help</a></li>
<li><a href="#">Pricing</a></li>
<li><a href="#">Team</a></li>
<li><a href="#">Services</a></li>
</ul>
<ul class="mega-col">
<li><a href="#">Coming Soon</a></li>
<li><a href="#">404 Error</a></li>
<li><a href="#">Search</a></li>
<li><a href="#">Author Page</a></li>
</ul>
<ul class="mega-col">
<li><a href="#">Full Width</a></li>
<li><a href="#">Right Column</a></li>
<li><a href="#">Left Column</a></li>
<li><a href="#">Maintenance</a></li>
</ul>
</li>
</ul>
</li>
<li class="dropdown"><a href="">Contact</a>
<ul>
<li><a href="#">About Version</a></li>
<li><a href="#">About Version</a></li>
<li><a href="#">Contact Us</a></li>
<li><a href="#">Contact Us</a></li>
</ul>
</li>
<li><a href="">Portfolio</a> </li>
<li><a href="">Team</a> </li>
</ul>
</nav>
</div>
css3代码：
CSS Code复制内容到剪贴板
*, *:before, *:after
{
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
margin: 0;
padding: 0;
}
body
{
background: #bdc3c7;
line-height: 1.5;
font-family: sans-serif;
text-transform: uppercase;
font-size: 16px;
color: #fff;
}
a
{
text-decoration: none;
color: #fff;
}
#header
{
background: #1E262D;
width: 100%;
position: relative;
}
#header:after
{
content: "";
clear: both;
display: block;
}
.search
{
float: rightright;
padding: 30px;
}
input
{
border: none;
padding: 10px;
border-radius: 20px;
}
.logo
{
float: left;
padding: 26px 0 26px;
}
.logo a
{
font-size: 28px;
display: block;
padding: 0 0 0 20px;
}
nav
{
float: rightright;
}
nav > ul
{
float: left;
position: relative;
}
nav li
{
list-style: none;
float: left;
}
nav .dropdown
{
position: relative;
}
nav li a
{
float: left;
padding: 35px;
}
nav li a:hover
{
background: #2C3E50;
}
nav li ul
{
display: none;
}
nav li:hover ul
{
display: inline;
}
nav li li
{
float: none;
}
nav .dropdown ul
{
position: absolute;
left: 0;
top: 100%;
background: #fff;
padding: 20px 0;
border-bottom: 3px solid #34495e;
}
nav .dropdown li
{
whitewhite-space: nowrap;
}
nav .dropdown li a
{
padding: 10px 35px;
font-size: 13px;
min-width: 200px;
}
nav .mega-dropdown
{
width: 100%;
position: absolute;
top: 100%;
left: 0;
background: #fff;
overflow: hidden;
padding: 20px 35px;
border-bottom: 3px solid #34495e;
}
nav li li a
{
float: none;
color: #333;
display: block;
padding: 8px 10px;
border-radius: 3px;
font-size: 13px;
}
nav li li a:hover
{
background: #bdc3c7;
background: #FAFBFB;
}
.mega-col
{
width: 25%;
float: left;
}
#menu-icon
{
position: absolute;
rightright: 0;
top: 50%;
margin-top: -12px;
margin-right: 30px;
display: none;
}
#menu-icon span
{
border: 2px solid #fff;
width: 30px;
margin-bottom: 5px;
display: block;
-webkit-transition: all .2s;
transition: all .1s;
}
@media only screen and (max-width: 1170px)
{
nav > ul > li > a
{
padding: 35px 15px;
}
}
@media only screen and (min-width: 960px)
{
nav
{
display: block !important;
}
}
@media only screen and (max-width: 959px)
{
nav
{
display: none;
width: 100%;
clear: both;
float: none;
max-height: 400px;
overflow-y: scroll;
}
#menu-icon
{
display: inline;
top: 45px;
cursor: pointer;
}
#menu-icon.active .first
{
transform: rotate(45deg);
-webkit-transform: rotate(45deg);
margin-top: 10px;
}
#menu-icon.active .second
{
transform: rotate(135deg);
-webkit-transform: rotate(135deg);
position: relative;
top: -9px;
}
#menu-icon.active .third
{
display: none;
}
.search
{
float: none;
}
.search input
{
width: 100%;
}
nav
{
padding: 10px;
}
nav ul
{
float: none;
}
nav li
{
float: none;
}
nav ul li a
{
float: none;
padding: 8px;
display: block;
}
#header nav ul ul
{
display: block;
position: static;
background: none;
border: none;
padding: 0;
}
#header nav a
{
color: #fff;
padding: 8px;
}
#header nav a:hover
{
background: #fff;
color: #333;
border-radius: 3px;
}
#header nav ul li li a:before
{
content: "- ";
}
.mega-col
{
width: 100%;
}
}
js代码：
JavaScript Code复制内容到剪贴板
$('#header').prepend('<div id="menu-icon"><span class="first"></span><span class="second"></span><span class="third"></span></div>');
$('#menu-icon').on('click', function () {
window.CP.stopExecutionOnTimeout(1);
$('nav').slideToggle();
$(this).toggleClass('active');
}); //@ sourceURL=pen.js
“用jquery和css3实现的响应式二级导航菜单”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注编程网网站，小编将为大家输出更多高质量的实用文章！
