css 实现三级联动菜单

时间：2025-03-30 18:05:19

昨天因为项目中想要把二级联动菜单改成三级联动菜单，所以我就单独写了一个tab导航栏，用纯css的方式实现的三级联动。一开始我想着可以用js实现，但是js的hover事件和mouseenter,mouseover,mouseleave,mouseout事件都会有一个问题，就是当鼠标移出区域块儿的时候，我们希望弹出来的二级菜单和三级菜单可能不会像我们希望的显示隐藏。所以，我们可以用css3的伪类元素实现。

大家可以去我的gitHub上去看demo,我把网址贴一下：https://github.com/dreamITGirl/projectStudy/blob/master/html/%E5%88%86%E7%BA%A7%E8%81%94%E5%8A%A8%E8%8F%9C%E5%8D%95%E6%A0%8F.html

顺便再把效果图贴一下：

css 实现三级联动菜单

代码如下

<!DOCTYPE html>

<html>

<head lang="en">

    <meta charset="UTF-8">

    <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0"/>

    <title>菜单栏</title>

    <style>

        html, body, ul, li {

            margin: 0;

            padding: 0;

            font-family: "微软雅黑", Helvetica, Arial, sans-serif;

        }

        ul, li {

            list-style: none;

        }

        .top {

            background: #4db3a4;

            height: 34px;

            width: 100%;

            padding: 0 10%;

            box-sizing: border-box;

        }

        .main-nav {

            display: flex;

            line-height: 34px;

        }

        .two-nav {

            background: #4db3a4;

            position: relative;

            display: none;

        }

        .three-nav {

            background: #4db3a4;

            position: absolute;

            top: 0;

            right: -116px;

            display: none;

        }

        .item-nav, .two-item, .three-item {

            width: 126px;

            text-align: center;

        }

        .item-nav > a, .two-item > a, .three-item > a {

            text-decoration: none;

            color: #fff;

        }

        .none {

            display: none;

        }

        .item-nav:hover > .two-nav {

            display: block;

        }

        .two-item:hover > .three-nav {

            display: block;

        }

        .item-nav:hover, .two-item:hover, .three-item:hover {

            background: #44a597;

        }

    </style>

</head>

<body>

<div class="top">

    <ul class="main-nav">

        <li class="item-nav">

            <a href="javascript:;">我的行程</a>

        </li>

        <li class="item-nav">

            <a href="javascript:;">ES管理员</a>

            <ul class="two-nav none">

                <li class="two-item">

                    <a href="javascript:;">ES差旅预订</a>

                    <ul class="three-nav none">

                        <li class="three-item">

                            <a href="javascript:;">ES差旅1</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">2</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">3</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">4</a>

                        </li>

                    </ul>

                </li>

                <li class="two-item">

                    <a href="javascript:;">ES差旅</a>

                    <ul class="three-nav none">

                        <li class="three-item">

                            <a href="javascript:;">酒店账单</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">飞机账单</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">火车账单</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">全部账单</a>

                        </li>

                    </ul>

                </li>

            </ul>

        </li>

        <li class="item-nav">

            <a href="javascript:;">差旅报表</a>

        </li>

        <li class="item-nav">

            <a href="javascript:;">差旅审批</a>

            <ul class="two-nav none">

                <li class="two-item">

                    <a href="javascript:;">酒店账单</a>

                    <ul class="three-nav none">

                        <li class="three-item">

                            <a href="javascript:;">酒店账单</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">飞机账单</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">火车账单</a>

                        </li>

                        <li class="three-item">

                            <a href="javascript:;">全部账单</a>

                        </li>

                    </ul>

                </li>

            </ul>

        </li>

    </ul>

</div>

</body>

</html>

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