网页左侧边栏二级菜单的学习_网站左侧两个菜单-优快云博客

本文链接：https://blog.youkuaiyun.com/luzhiweistudy/article/details/70226148

本文介绍了一款基于CSS3的垂直手风琴折叠菜单，包括HTML结构、CSS样式及JavaScript交互实现。该菜单适用于网站导航，通过简洁的代码实现了优雅的展开与折叠效果。

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1.二级菜单

手风琴垂直菜单，网上很多（未改），设计上拉下拉来实现
资源地址：http://download.youkuaiyun.com/detail/luzhiweistudy/9828978

1. index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>CSS3垂直手风琴折叠菜单DEMO演示</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- Iconos -->
    <link href="http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">

    <link rel="stylesheet" href="css/style.css" media="screen" type="text/css" />

</head>

<body>
<div style="text-align:center;clear:both">
<script src="/gg_bd_ad_720x90.js" type="text/javascript"></script>
<script src="/follow.js" type="text/javascript"></script>
</div>
    <!-- Contenedor -->
    <ul id="accordion" class="accordion">
        <li>
            <div class="link"><i class="fa fa-paint-brush"></i>Diseño web<i class="fa fa-chevron-down"></i></div>
            <ul class="submenu">
                <li><a href="#">Photoshop</a></li>
                <li><a href="#">HTML</a></li>
                <li><a href="#">CSS</a></li>
                <li><a href="#">Maquetacion web</a></li>
            </ul>
        </li>
        <li>
            <div class="link"><i class="fa fa-code"></i>Desarrollo front-end<i class="fa fa-chevron-down"></i></div>
            <ul class="submenu">
                <li><a href="#">Javascript</a></li>
                <li><a href="#">jQuery</a></li>
                <li><a href="#">Frameworks javascript</a></li>
            </ul>
        </li>
        <li>
            <div class="link"><i class="fa fa-mobile"></i>Diseño responsive<i class="fa fa-chevron-down"></i></div>
            <ul class="submenu">
                <li><a href="#">Tablets</a></li>
                <li><a href="#">Dispositivos mobiles</a></li>
                <li><a href="#">Medios de escritorio</a></li>
                <li><a href="#">Otros dispositivos</a></li>
            </ul>
        </li>
        <li><div class="link"><i class="fa fa-globe"></i>Posicionamiento web<i class="fa fa-chevron-down"></i></div>
            <ul class="submenu">
                <li><a href="#">Google</a></li>
                <li><a href="#">Bing</a></li>
                <li><a href="#">Yahoo</a></li>
                <li><a href="#">Otros buscadores</a></li>
            </ul>
        </li>
    </ul>

  <script src='http://codepen.io/assets/libs/fullpage/jquery.js'></script>

  <script src="js/index.js"></script>

</body>

</html>

2. style.css

* {
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

body {
    background: #2d2c41;
    font-family: 'Open Sans', Arial, Helvetica, Sans-serif, Verdana, Tahoma;
}

ul {
    list-style-type: none;
}

a {
    color: #b63b4d;
    text-decoration: none;
}

/** =======================
 * Contenedor Principal
 ===========================*/
h1 {
    color: #FFF;
    font-size: 24px;
    font-weight: 400;
    text-align: center;
    margin-top: 80px;
 }

h1 a {
    color: #c12c42;
    font-size: 16px;
 }

 .accordion {
    width: 100%;
    max-width: 360px;
    margin: 30px auto 20px;
    background: #FFF;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
 }

.accordion .link {
    cursor: pointer;
    display: block;
    padding: 15px 15px 15px 42px;
    color: #4D4D4D;
    font-size: 14px;
    font-weight: 700;
    border-bottom: 1px solid #CCC;
    position: relative;
    -webkit-transition: all 0.4s ease;
    -o-transition: all 0.4s ease;
    transition: all 0.4s ease;
}

.accordion li:last-child .link {
    border-bottom: 0;
}

.accordion li i {
    position: absolute;
    top: 16px;
    left: 12px;
    font-size: 18px;
    color: #595959;
    -webkit-transition: all 0.4s ease;
    -o-transition: all 0.4s ease;
    transition: all 0.4s ease;
}

.accordion li i.fa-chevron-down {
    right: 12px;
    left: auto;
    font-size: 16px;
}

.accordion li.open .link {
    color: #b63b4d;
}

.accordion li.open i {
    color: #b63b4d;
}
.accordion li.open i.fa-chevron-down {
    -webkit-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
    -o-transform: rotate(180deg);
    transform: rotate(180deg);
}

/**
 * Submenu
 -----------------------------*/
 .submenu {
    display: none;
    background: #444359;
    font-size: 14px;
 }

 .submenu li {
    border-bottom: 1px solid #4b4a5e;
 }

 .submenu a {
    display: block;
    text-decoration: none;
    color: #d9d9d9;
    padding: 12px;
    padding-left: 42px;
    -webkit-transition: all 0.25s ease;
    -o-transition: all 0.25s ease;
    transition: all 0.25s ease;
 }

 .submenu a:hover {
    background: #b63b4d;
    color: #FFF;
 }

3. index.js

$(function() {
    var Accordion = function(el, multiple) {
        this.el = el || {};
        this.multiple = multiple || false;

        // Variables privadas
        var links = this.el.find('.link');
        // Evento
        links.on('click', {el: this.el, multiple: this.multiple}, this.dropdown)
    }

    Accordion.prototype.dropdown = function(e) {
        var $el = e.data.el;
            $this = $(this),
            $next = $this.next();

        $next.slideToggle();
        $this.parent().toggleClass('open');

        if (!e.data.multiple) {
            $el.find('.submenu').not($next).slideUp().parent().removeClass('open');
        };
    }   

    var accordion = new Accordion($('#accordion'), false);
});