自定义样式-menubutton
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        Output
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    <!doctype html>
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>自定义样式-menubutton</title>
<style type="text/css">
body{
    background: #fff;
}
.nav-menu {
outline: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
.nav-menu a {
    text-decoration: none;
}
.nav-menu a, .nav-menu a:link, .nav-menu a:visited {
    color: #333;
}
.nav-menu a:hover, .nav-menu .nav-menuitem-hover a, .nav-menu a:active {
    text-decoration: none;
    color: #F96400;
}
.horizonal {
    background-color: #f0f0f0;
    border: 1px solid #dcdcdc;
    height: 33px;
    _overflow: hidden;
    *zoom: 1;
}
.nav-menu .nav-menuitem {
    white-space: nowrap;
}
.nav-menu .nav-menuitem .title {
    display: block;
    font-size: 14px;
    font-weight: bold;
    height: 33px;
    line-height: 33px;
    padding: 0 30px;
}
.nav-menu .nav-menuitem span.title {
    padding: 0 20px 0 12px;
}
.horizonal .nav-menuitem {
    float: left;
}
.nav-menu .nav-menuitem-hover a.title {
    border-top: 2px solid #F96400;
    margin-top: -1px;
    line-height: 31px;
    background-color: #e4e4e4;
    background-image: -moz-linear-gradient(-90deg, #e9e9e9, #dedede);
    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0, #e9e9e9), color-stop(1, #dedede));
    filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#e9e9e9', EndColorStr='#dedede');
    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorStr='#e9e9e9', EndColorStr='#dedede')";
}
.nav-menu .nav-menuitem-hover span.title {
    background: #f5f5f5;
    padding-bottom: 1px;
}
.nav-menu .nav-submenu {
    position: relative;
    z-index: 10000;
}
.nav-menu .nav-submenu .nav-submenu-arrow {
    position: absolute;
    top: 46%;
    top: 40% \9;
    right: 6px;
    width: 0;
    height: 0;
    border-width: 4px 4px 0 4px;
    border-style: solid dashed dashed dashed;
    border-color: #666 transparent transparent transparent;
    font-size: 0;
    line-height: 0;
    /*//goo.gl/jb0w0*/
    -webkit-transform-style: preserve-3d;
    -webkit-transition: -webkit-transform 0.2s ease-in;
    -moz-transition: -moz-transform 0.2s ease-in;
    -o-transition: -o-transform 0.2s ease-in;
    transition: transform 0.2s ease-in;
    padding: 0;
}
.nav-menu .nav-submenu-hover .nav-submenu-arrow {
    -moz-transform: rotate(180deg);
    -moz-transform-origin: 50% 30%;
    -webkit-transform: rotate(180deg);
    -webkit-transform-origin: 50% 30%;
    -o-transform: rotate(180deg);
    -o-transform-origin: 50% 50%;
    transform: rotate(180deg);
    transform-origin: 50% 30%;
    filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=2);
}
.nav-popupmenu {
    background-color: #f5f5f5;
    border: 1px solid #CBCBCB;
    position: absolute;
    z-index: 99;
    left: -9999px;
    top: -9999px;
}
.nav-popupmenu .nav-menuitem a {
    display: block;
    padding-left: 12px;
    height: 30px;
    line-height: 30px;
}
.nav-popupmenu .nav-menuitem-hover a {
    background: #fff;
    font-weight: bold;
}
.nav-popupmenu-hidden {
    visibility: hidden;
}
.nav-menuitem-content {
    display: inline;
}
</style>
<script src="//g.alicdn.com/kissy/k/5.0.1/seed.js" data-config="{combine:true}"></script>
</head>
<body>
<h1>自定义样式-menubutton</h1>
<p>模拟 mouse trigger menubutton</p>
<div id="context" style="width: 200px;margin-left:50px;">
</div>
<script type="text/javascript">
    require(['menu', 'separator', 'node'], function (Menu, Separator, $) {
        var context = $("#context");
        var b, bb;
        var sb = new Menu.PopupMenu({
            prefixCls:"nav-",
            // boolean,是否鼠标脱离菜单后自动隐藏全部下拉菜单
            autoHideOnMouseLeave:true,
            width:150,
            align:{
                offset:[-1, -1],
                points:['tl', 'tl']
            }
        });
        sb.addChild(new Menu.Item({
            prefixCls:"nav-",
            content:"<a>我要买</a>"}));
        sb.addChild(new Menu.Item({
            prefixCls:"nav-",
            content:"<a>我要卖</a>"}));
        sb.addChild(new Separator({
            prefixCls:"nav-"
        }));
        var sb2 = new Menu.PopupMenu({
            prefixCls:"nav-",
            width:90,
            // boolean,是否鼠标脱离菜单后自动隐藏全部下拉菜单
            autoHideOnMouseLeave:true,
            children:[
                new Menu.Item({
                    prefixCls:"nav-",
                    content:"<a>旺铺</a>"})
            ],
            // bug elStyle 无效
            elStyle:{
                color:"red"
            }
        });
        sb2.addChild(new Menu.Item({
            prefixCls:"nav-",
            content:"<a>装修</a>"}));
        var b2 = new Menu.SubMenu({
            prefixCls:"nav-",
            content:"<a>卖家中心</a>",
            menu:sb2
        });
        sb.addChild(b2);
        b = new Menu.SubMenu({
            prefixCls:"nav-",
            content:"<span class='title' style='width:58px'>淘宝网</span>",
            menu:sb
        });
        var menu = new Menu({
            prefixCls:"nav-",
            width:90,
            elCls:"horizonal",
            render:'#context',
            children:[b]
        });
        menu.render();
        menu.on("click", function (e) {
            S.log(e.target.get("content"));
        });
    });
</script>
</body>
</html> 
         
		