首页 > 编程语言 > jQuery实现二级导航菜单的示例
2020
10-10

jQuery实现二级导航菜单的示例

实用JQ实现导航二级菜单效果，导航菜单在网站中非常常见，有的网站可能会出现三级菜单及多级菜单模式，下面我们来简单的实现一个二级菜单的效果。

部分效果截图：

整体代码：

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<!DOCTYPE html> 
<html> 
    <head> 
        <meta charset="UTF-8"> 
        <title>导航菜单案例</title> 
        <style> 
            *{ 
                padding: 0; 
                margin: 0; 
            } 
            ul,li{ 
                list-style: none; 
            } 
            a{ 
                text-decoration: none; 
            } 
            nav{ 
                width: 1140px; 
                height: 40px; 
                margin: 0 auto; 
                border:solid 1px #CCC; 
                position: relative;
   
            } 
            nav ul li{ 
                width: 150px; 
                line-height: 40px; 
                float: left; 
            } 
            nav ul li a{ 
                display: block; 
                width: 100%; 
                float: left; 
                color: #444; 
                font-size: 14px; 
                text-align: center; 
            } 
            nav>ul>li:hover{ 
                background: #f5f5f5; 
            } 
            nav ul li ul{ 
                display: none; 
                width: 150px; 
                position: absolute; 
                background-color: #f5f5f5; 
                overflow: hidden; 
                top:41px; 
            } 
            nav ul li ul li{ 
                float: left; 
                border-bottom: solid 1px #CCC; 
            } 
            nav ul li ul li:last-child{ 
                border: none; 
            } 
            nav>ul>li>ul>li:hover a{ 
                background-color: #444; 
                color: #FFF; 
            } 
        </style> 
    </head> 
    <body> 
        <br /> 
        <br /> 
        <nav> 
            <ul> 
                <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 首页">首页</a></li> 
                <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 联系我们">联系我们</a></li> 
                <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 在线留言">在线留言</a></li> 
                <li> 
                    <a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 新闻资讯">新闻资讯</a> 
                    <ul> 
                        <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 国内资讯">国内资讯</a></li> 
                        <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 国内资讯">国内资讯</a></li> 
                    </ul> 
                </li> 
                <li> 
                    <a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 产品中心">产品中心</a> 
                    <ul> 
                        <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 除雪机">除雪机</a></li> 
                        <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 运雪车">运雪车</a></li> 
                    </ul> 
                </li> 
                <li><a href="" title=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" 案例展示">案例展示</a></li> 
            </ul> 
        </nav> 
        <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script> 
        <script> 
            var $li = $("nav > ul > li"); 
        $li.mouseenter(function () { 
        $(this).children("ul").stop().slideDown(); 
        }); 
        $li.mouseleave(function () { 
            $(this).children("ul").stop().slideUp(); 
        });
   
        </script> 
    </body> 
</html>

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