css3和jquery实现的可折叠导航菜单适合放在手机网页的导航菜单

之前为大家介绍了好几款css3导航，今天为大家在介绍的是一款适合放在手机网页的导航菜单。点击列表图标以下拉式的形式显示菜单，单击关闭，动画关闭。效果相当不错。效果图如下：
 



这个实例由css3和依赖于jquery插件。下面是实现代码

html代码：

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代码如下:

<nav class="nav" role="navigation" style="height: 195px;">
<ul class="nav-items">
<li><a target=_blank href="http://www.w2bc.com">home</a></li>
<li><a target=_blank href="http://www.w2bc.com">about</a></li>
<li><a target=_blank href="http://www.w2bc.com">clients</a></li>
<li><a target=_blank href="http://www.w2bc.com">contact us</a></li>
</ul>
</nav>
<header style="-webkit-transform: translate3d(0px, 195px, 0px);">
<button class="menu-button-target active" data-ic-class="button-trigger">
<span class="menu-button"></span>
</button>
example header
</header>
<section>
<article>
</article>
<article>
</article>
<article>
</article>
<article>
</article>
<article>
</article>
</section>

css3代码：

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代码如下:

*
{
box-sizing: border-box;
}
body
{
font-family: "helveticaneue-light" , "helvetica neue light" , "helvetica neue" , helvetica, arial, "lucida grande" , sans-serif;
font-weight: 300;
}
nav
{
position: fixed;
-webkit-transform: translate3d(0, 0, 0);
left: 0;
transition: all 0.4s ease;
width: 100%;
background: #34495e;
height: 0;
overflow: hidden;
transition-delay: 0.25s;
}
.active nav
{
transition-delay: 0s;
}
nav ul
{
width: 95%;
margin: 0 auto;
}
nav ul li
{
padding: 5px;
border-bottom: 1px solid white;
}
nav ul li:nth-child(1) a
{
transition-delay: 0.1s;
}
nav ul li:nth-child(2) a
{
transition-delay: 0.15s;
}
nav ul li:nth-child(3) a
{
transition-delay: 0.2s;
}
nav ul li:nth-child(4) a
{
transition-delay: 0.25s;
}
nav ul li:last-child
{
border: none;
}
nav ul li a
{
transition: all 0.2s cubic-bezier(0.455, 0.03, 0.515, 0.955);
position: relative;
display: block;
text-decoration: none;
color: white;
font-size: 18px;
padding: 10px;
-webkit-transform: translate3d(100px, 0, 0);
opacity: 0;
}
.active nav ul li a
{
-webkit-transform: translatex(0);
opacity: 1;
}
header
{
transition: all 0.4s ease;
-webkit-transform: translate3d(0, 0, 0);
left: 0;
width: 100%;
position: fixed;
background: #27ae60;
color: white;
padding: 20px;
text-align: center;
font-size: 20px;
transition-delay: 0.25s;
}
.active header
{
transition-delay: .08s;
}
section
{
background: #f5f5f5;
padding-top: 80px;
}
article
{
background: white;
height: 500px;
width: 95%;
border-radius: 3px;
margin: 0 auto 20px auto;
border: 1px solid #e4e4e4;
}
.menu-button-target
{
background: transparent;
border: none;
outline: none;
cursor: pointer;
position: absolute;
z-index: 200;
left: 10px;
height: 50px;
top: 50%;
margin-top: -23px;
webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
.menu-button-target.active .menu-button
{
transition: background .2s ease;
background-color: transparent;
}
.menu-button-target.active .menu-button:before, .menu-button-target.active .menu-button:after
{
transition: top .3s ease, -webkit-transform .3s .2s ease;
}
.menu-button-target.active .menu-button:before
{
top: 0;
-webkit-transform: rotate(45deg);
}
.menu-button-target.active .menu-button:after
{
top: 0;
-webkit-transform: rotate(-45deg);
}
.menu-button
{
position: relative;
top: 50%;
left: 0;
display: block;
width: 40px;
height: 4px;
margin-top: -2px;
background-color: white;
border-radius: 10px;
transition: background .2s .2s;
}
.menu-button:before, .menu-button:after
{
content: "";
display: block;
position: absolute;
width: 100%;
height: 100%;
left: 0;
background-color: white;
transition: top .3s .2s ease, -webkit-transform .3s ease;
border-radius: 10px;
-webkit-transform-origin: 50% 50%;
}
.menu-button:before
{
top: -10px;
-webkit-transform: rotate(0deg);
}
.menu-button:after
{
top: 10px;
-webkit-transform: rotate(0deg);
}

js代码：

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代码如下:

var $menutrigger = $('[data-ic-class="button-trigger"]'),
$menuoverlay = $('[data-ic-class="overlay"]'),
$menuitem = $('.menu-item'),
activeclass = 'active',
$nav = $('nav'),
$navulheight = $('.nav-items').outerheight(),
navopen = false,
$header = $('header');
var istouch = false;
if ($('html').hasclass('touch')) {
istouch = true;
}
function menufunction() {
$menutrigger.toggleclass(activeclass);
if (!navopen) {
$nav.height($navulheight);
navopen = true;
$('body').addclass('active');
$header.css('transform', 'translate3d(0, ' + $navulheight + 'px, 0)');
} else {
$nav.height(0);
$header.css('transform', 'translate3d(0, 0, 0)');
navopen = false;
$('body').removeclass('active');
}
}
if (istouch) {
$menutrigger.on('touchstart', function () {
menufunction();
});
}
if (!istouch) {
$menutrigger.on('click', function () {
menufunction();
});
}