css实现淡入淡出多级菜单效果代码-html代码-BFW代码库

css实现淡入淡出多级菜单效果代码

代码语言：html

代码描述：css实现淡入淡出多级菜单效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">

    <link rel='stylesheet prefetch' href='https://fonts.googleapis.com/css?family=Karla'>
    <link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/font-awesome-4.7.0/css/font-awesome.min.css">
    <style>
        html, body {
            padding: 0px;
            margin: 0px;
            background: #222;
            font-family: 'Karla', sans-serif;
            width: 100vw;
        }
        body * {
            margin: 0;
            padding: 0;
        }

        /* HTML Nav Styles */
        /* HTML Nav Styles */
        /* HTML Nav Styles */
        nav menuitem {
            position: relative;
            display: block;
            opacity: 0;
            cursor: pointer;
        }

        nav menuitem > menu {
            position: absolute;
            pointer-events: none;
        }
        nav > menu {
            display: -webkit-box;
            display: -ms-flexbox;
            display: flex;
        }

        nav > menu > menuitem {
            pointer-events: all;
            opacity: 1;
        }
        menu menuitem a {
            white-space: nowrap;
            display: block;
        }

        menuitem:hover > menu {
            pointer-events: initial;
        }
        menuitem:hover > menu > menuitem,
        menu:hover > menuitem {
            opacity: 1;
        }
        nav > menu > menuitem menuitem menu {
            -webkit-transform: translateX(100%);
            transform: translateX(100%);
            top: 0;
            right: 0;
        }
        /* User Styles Below Not Required */
        /* User Styles Below Not Required */
        /* User Styles Below Not Required */

        nav {
            margin-top: 40px;
            margin-left: 40px;
        }

        nav a {
            background: #75F;
            color: #FFF;
            min-width: 190px;
            -webkit-transition: background 0.5s, color 0.5s, -webkit-transform 0.5s;
            transition: background 0.5s, color 0.5s, -webkit-transform 0.5s;
            transition: background 0.5s, color 0.5s, transform 0.5s;
            transition: background 0.5s, color 0.5s, transform 0.5s, -webkit-transform 0.5s;
            margin: 0px 6px 6px 0px;
            padding: 20px 40px;
            -webkit-box-sizing: border-box;
            box-sizing: border-box;
            border-radius: 3px;
            -webkit-box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.5);
            box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.5);
            position: relative;
        }

        nav a:hover:before {
            content: '';
            top: 0;
            left: 0;
            position: absolute;
            background: rgba(0, 0, 0, 0.2);
            width: 100%;
            height: 100%;
        }

        nav > menu > menuitem > a + menu:after {
            content: '';
            position: absolute;
            border: 10px solid transparent;
            border-top: 10px solid white;
            left: 12px;
            top: -40px;
        }
        nav menuitem > menu > menuitem > a + menu:after {
            content: '';
            position: absolute;
            border: 10px solid transparent;
            border-left: 10px solid white;
            top: 20px;
            left: -180px;
            -webkit-transition: opacity 0.6, -webkit-transform 0s;
            transition: opacity .........完整代码请登录后点击上方下载按钮下载查看