1、所实现的具体功能效果

在这里插入图片描述

2、具体功能实现代码

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>下拉菜单</title>
        <style type="text/css">
            body {
                width: 600px;
            }
            ul {
                list-style-type: none;
            }
            #app > ul > li {
                float: left;
                text-align: center;
                position: relative;
            }
            a {
                text-decoration: none;
                display: block;
                color: #fff;
                width: 120px;
                height: 40px;
                line-height: 40px;
                border: 1px solid #fff;
                border: 1px 1px 0 0;
                background-color: #255f9e;
            }
            a:hover {
                background-color: burlywood;
            }
            #app > ul > li ul {
                position: absolute;
                left: -40px;
            }
        </style>
    </head>
    <body>
        <div id="app">
            <ul>
                <li v-for="menu in menus" @mouseover="menu.show = !menu.show" @mouseout="menu.show = !menu.show">
                    <a :href="menu.url">{{menu.name}}</a>
                    <ul v-show="menu.show">
                        <li v-for="subMenu in menu.subMenus">
                            <a :href="subMenu.url">{{subMenu.name}}</a>
                        </li>
                    </ul>
                </li>
            </ul>
        </div>
        <script src="../../plugings/vue.js"></script>
        <script>
            new Vue({
                el: '#app',
                data: {
                    menus: [
                        {
                            name: '我的淘宝', url: '#', show: false, subMenus: [
                                {name: '已买宝贝', url: '#'},
                                {name: '已卖宝贝', url: '#'}
                            ]
                        },
                        {
                            name: '收藏夹', url: '#', show:false, subMenus: [
                                {name: '收藏宝贝', url: '#'},
                                {name: '收藏店铺', url: '#'}
                            ]
                        }
                    ]
                }
            })
        </script>
    </body>
</html>
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